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class="vector-menu-heading"> Comunitat </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-portal" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Portal" title="Sobre el projecte, què podeu fer, on trobareu les coses"><span>Portal viquipedista</span></a></li><li id="n-Agenda-d'actes" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Trobades"><span>Agenda d'actes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Especial:Canvis_recents" title="Una llista dels canvis recents al wiki [r]" accesskey="r"><span>Canvis recents</span></a></li><li id="n-La-taverna" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:La_taverna"><span>La taverna</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Contacte"><span>Contacte</span></a></li><li id="n-Xat" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Canals_IRC"><span>Xat</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Ajuda" title="El lloc per a saber més coses"><span>Ajuda</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Portada" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Viquipèdia" src="/static/images/mobile/copyright/wikipedia-wordmark-ca.svg" style="width: 7.5em; height: 1.4375em;"> <img class="mw-logo-tagline" alt="l'Enciclopèdia Lliure" src="/static/images/mobile/copyright/wikipedia-tagline-ca.svg" width="120" height="14" style="width: 7.5em; height: 0.875em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Especial:Cerca" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Cerca a la Viquipèdia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Cerca</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Cerca a Viquipèdia" aria-label="Cerca a Viquipèdia" autocapitalize="sentences" title="Cerca a la Viquipèdia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Especial:Cerca"> </div> <button class="cdx-button cdx-search-input__end-button">Cerca</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Eines personals"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Aparença" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Aparença</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=ca.wikipedia.org&uselang=ca" class=""><span>Donatius</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Crea_compte&returnto=MP3" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori" class=""><span>Crea un compte</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Registre_i_entrada&returnto=MP3" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o" class=""><span>Inicia la sessió</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Més opcions" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Eines personals" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Eines personals</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Menú d'usuari" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a 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registrats <a href="/wiki/Ajuda:Introducci%C3%B3" aria-label="Vegeu més informació sobre l'edició"><span>més informació</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Especial:Contribucions_pr%C3%B2pies" title="Una llista de les modificacions fetes des d'aquesta adreça IP [y]" accesskey="y"><span>Contribucions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Especial:Discussi%C3%B3_personal" title="Discussió sobre les edicions per aquesta adreça ip. [n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Codificador" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Codificador"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Codificador</span> </div> </a> <button aria-controls="toc-Codificador-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Commuta la subsecció Codificador</span> </button> <ul id="toc-Codificador-sublist" class="vector-toc-list"> <li id="toc-Banc_de_Filtres" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Banc_de_Filtres"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Banc de Filtres</span> </div> </a> <ul id="toc-Banc_de_Filtres-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Transformació_en_freqüència" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Transformació_en_freqüència"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Transformació en freqüència</span> </div> </a> <ul id="toc-Transformació_en_freqüència-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Emmascarament_temporal_i_freqüencial" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Emmascarament_temporal_i_freqüencial"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Emmascarament temporal i freqüencial</span> </div> </a> <ul id="toc-Emmascarament_temporal_i_freqüencial-sublist" class="vector-toc-list"> <li id="toc-Emmascarament_freqüencial" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Emmascarament_freqüencial"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3.1</span> <span>Emmascarament freqüencial</span> </div> </a> <ul id="toc-Emmascarament_freqüencial-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Emmascarament_temporal" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Emmascarament_temporal"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3.2</span> <span>Emmascarament temporal</span> </div> </a> <ul id="toc-Emmascarament_temporal-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Escalabilitat_i_Quantificació" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Escalabilitat_i_Quantificació"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Escalabilitat i Quantificació</span> </div> </a> <ul id="toc-Escalabilitat_i_Quantificació-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Codificació_de_Huffmann" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Codificació_de_Huffmann"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Codificació de Huffmann</span> </div> </a> <ul id="toc-Codificació_de_Huffmann-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Descodificador" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Descodificador"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Descodificador</span> </div> </a> <ul id="toc-Descodificador-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Estructura_MP3" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Estructura_MP3"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Estructura MP3</span> </div> </a> <ul id="toc-Estructura_MP3-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Taxa_de_bits" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Taxa_de_bits"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Taxa de bits</span> </div> </a> <ul id="toc-Taxa_de_bits-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vegeu_també" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vegeu_també"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Vegeu també</span> </div> </a> <ul id="toc-Vegeu_també-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enllaços_externs" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enllaços_externs"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Enllaços externs</span> </div> </a> <ul id="toc-Enllaços_externs-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contingut" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Taula de continguts" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Commuta la taula de continguts." > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Commuta la taula de continguts.</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">MP3</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vés a un article en una altra llengua. Disponible en 77 llengües" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-77" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">77 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/MP3" title="MP3 - afrikaans" lang="af" hreflang="af" data-title="MP3" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8A%A4%E1%88%9D%E1%8D%923" title="ኤምፒ3 - amhàric" lang="am" hreflang="am" data-title="ኤምፒ3" data-language-autonym="አማርኛ" data-language-local-name="amhàric" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A5%D9%85_%D8%A8%D9%8A_3" title="إم بي 3 - àrab" lang="ar" hreflang="ar" data-title="إم بي 3" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/MP3" title="MP3 - asturià" lang="ast" hreflang="ast" data-title="MP3" data-language-autonym="Asturianu" data-language-local-name="asturià" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/MP3" title="MP3 - azerbaidjanès" lang="az" hreflang="az" data-title="MP3" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaidjanès" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/MP3" title="MP3 - belarús" lang="be" hreflang="be" data-title="MP3" data-language-autonym="Беларуская" data-language-local-name="belarús" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/MP3" title="MP3 - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="MP3" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/MP3" title="MP3 - búlgar" lang="bg" hreflang="bg" data-title="MP3" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/MP3" title="MP3 - bosnià" lang="bs" hreflang="bs" data-title="MP3" data-language-autonym="Bosanski" data-language-local-name="bosnià" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%A6%DB%8E%D9%85_%D9%BE%DB%8C_%D8%AA%D8%B1%DB%8C" title="ئێم پی تری - kurd central" lang="ckb" hreflang="ckb" data-title="ئێم پی تری" data-language-autonym="کوردی" data-language-local-name="kurd central" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/MP3" title="MP3 - txec" lang="cs" hreflang="cs" data-title="MP3" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/MP3" title="MP3 - danès" lang="da" hreflang="da" data-title="MP3" data-language-autonym="Dansk" data-language-local-name="danès" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/MP3" title="MP3 - alemany" lang="de" hreflang="de" data-title="MP3" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/MP3" title="MP3 - grec" lang="el" hreflang="el" data-title="MP3" data-language-autonym="Ελληνικά" data-language-local-name="grec" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/MP3" title="MP3 - anglès" lang="en" hreflang="en" data-title="MP3" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/MP3" title="MP3 - esperanto" lang="eo" hreflang="eo" data-title="MP3" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/MP3" title="MP3 - espanyol" lang="es" hreflang="es" data-title="MP3" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/MP3" title="MP3 - estonià" lang="et" hreflang="et" data-title="MP3" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/MP3" title="MP3 - basc" lang="eu" hreflang="eu" data-title="MP3" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/MP3" title="MP3 - persa" lang="fa" hreflang="fa" data-title="MP3" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/MP3" title="MP3 - finès" lang="fi" hreflang="fi" data-title="MP3" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/MP3" title="MP3 - francès" lang="fr" hreflang="fr" data-title="MP3" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/MP3" title="MP3 - irlandès" lang="ga" hreflang="ga" data-title="MP3" data-language-autonym="Gaeilge" data-language-local-name="irlandès" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/MP3" title="MP3 - gallec" lang="gl" hreflang="gl" data-title="MP3" data-language-autonym="Galego" data-language-local-name="gallec" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%8F%E0%AA%AE%E0%AA%AA%E0%AB%80%E0%AA%A5%E0%AB%8D%E0%AA%B0%E0%AB%80" title="એમપીથ્રી - gujarati" lang="gu" hreflang="gu" data-title="એમપીથ્રી" data-language-autonym="ગુજરાતી" data-language-local-name="gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/MP3" title="MP3 - hebreu" lang="he" hreflang="he" data-title="MP3" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/MP3" title="MP3 - croat" lang="hr" hreflang="hr" data-title="MP3" data-language-autonym="Hrvatski" data-language-local-name="croat" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/MP3" title="MP3 - hongarès" lang="hu" hreflang="hu" data-title="MP3" data-language-autonym="Magyar" data-language-local-name="hongarès" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/MP3" title="MP3 - armeni" lang="hy" hreflang="hy" data-title="MP3" data-language-autonym="Հայերեն" data-language-local-name="armeni" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/MP3" title="MP3 - interlingua" lang="ia" hreflang="ia" data-title="MP3" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/MP3" title="MP3 - indonesi" lang="id" hreflang="id" data-title="MP3" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesi" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/MP3" title="MP3 - italià" lang="it" hreflang="it" data-title="MP3" data-language-autonym="Italiano" data-language-local-name="italià" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/MP3" title="MP3 - japonès" lang="ja" hreflang="ja" data-title="MP3" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/MP3" title="MP3 - georgià" lang="ka" hreflang="ka" data-title="MP3" data-language-autonym="ქართული" data-language-local-name="georgià" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/MP3" title="MP3 - kannada" lang="kn" hreflang="kn" data-title="MP3" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/MP3" title="MP3 - coreà" lang="ko" hreflang="ko" data-title="MP3" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/MP3" title="MP3 - llatí" lang="la" hreflang="la" data-title="MP3" data-language-autonym="Latina" data-language-local-name="llatí" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/MP3" title="MP3 - luxemburguès" lang="lb" hreflang="lb" data-title="MP3" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemburguès" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/MP3" title="MP3 - limburguès" lang="li" hreflang="li" data-title="MP3" data-language-autonym="Limburgs" data-language-local-name="limburguès" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/MP3" title="MP3 - llombard" lang="lmo" hreflang="lmo" data-title="MP3" data-language-autonym="Lombard" data-language-local-name="llombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/MP3" title="MP3 - lituà" lang="lt" hreflang="lt" data-title="MP3" data-language-autonym="Lietuvių" data-language-local-name="lituà" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/MP3" title="MP3 - letó" lang="lv" hreflang="lv" data-title="MP3" data-language-autonym="Latviešu" data-language-local-name="letó" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/MP3" title="MP3 - minangkabau" lang="min" hreflang="min" data-title="MP3" data-language-autonym="Minangkabau" data-language-local-name="minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%8E%E0%B4%82%E2%80%8C%E0%B4%AA%E0%B4%BF3" title="എം‌പി3 - malaiàlam" lang="ml" hreflang="ml" data-title="എം‌പി3" data-language-autonym="മലയാളം" data-language-local-name="malaiàlam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%8F%E0%A4%AE%E0%A4%AA%E0%A5%80%E0%A5%A9" title="एमपी३ - marathi" lang="mr" hreflang="mr" data-title="एमपी३" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/MP3" title="MP3 - malai" lang="ms" hreflang="ms" data-title="MP3" data-language-autonym="Bahasa Melayu" data-language-local-name="malai" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%A1%E1%80%99%E1%80%BA%E1%80%95%E1%80%AE%E1%80%9E%E1%80%9B%E1%80%AE%E1%80%B8" title="အမ်ပီသရီး - birmà" lang="my" hreflang="my" data-title="အမ်ပီသရီး" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmà" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/MP3" title="MP3 - neerlandès" lang="nl" hreflang="nl" data-title="MP3" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/MP3" title="MP3 - noruec nynorsk" lang="nn" hreflang="nn" data-title="MP3" data-language-autonym="Norsk nynorsk" data-language-local-name="noruec nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/MP3" title="MP3 - noruec bokmål" lang="nb" hreflang="nb" data-title="MP3" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pam mw-list-item"><a href="https://pam.wikipedia.org/wiki/MP3" title="MP3 - pampanga" lang="pam" hreflang="pam" data-title="MP3" data-language-autonym="Kapampangan" data-language-local-name="pampanga" class="interlanguage-link-target"><span>Kapampangan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/MP3" title="MP3 - polonès" lang="pl" hreflang="pl" data-title="MP3" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/MP3" title="MP3 - portuguès" lang="pt" hreflang="pt" data-title="MP3" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/MP3" title="MP3 - romanès" lang="ro" hreflang="ro" data-title="MP3" data-language-autonym="Română" data-language-local-name="romanès" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/MP3" title="MP3 - rus" lang="ru" hreflang="ru" data-title="MP3" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/MP3" title="MP3 - serbocroat" lang="sh" hreflang="sh" data-title="MP3" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroat" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/MP3" title="MP3 - singalès" lang="si" hreflang="si" data-title="MP3" data-language-autonym="සිංහල" data-language-local-name="singalès" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/MP3" title="MP3 - Simple English" lang="en-simple" hreflang="en-simple" data-title="MP3" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/MP3" title="MP3 - eslovac" lang="sk" hreflang="sk" data-title="MP3" data-language-autonym="Slovenčina" data-language-local-name="eslovac" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/MP3" title="MP3 - eslovè" lang="sl" hreflang="sl" data-title="MP3" data-language-autonym="Slovenščina" data-language-local-name="eslovè" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/MP3" title="MP3 - albanès" lang="sq" hreflang="sq" data-title="MP3" data-language-autonym="Shqip" data-language-local-name="albanès" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/MP3" title="MP3 - serbi" lang="sr" hreflang="sr" data-title="MP3" data-language-autonym="Српски / srpski" data-language-local-name="serbi" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/MP3" title="MP3 - suec" lang="sv" hreflang="sv" data-title="MP3" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%8E%E0%AE%AE%E0%AF%8D%E0%AE%AA%E0%AE%BF3" title="எம்பி3 - tàmil" lang="ta" hreflang="ta" data-title="எம்பி3" data-language-autonym="தமிழ்" data-language-local-name="tàmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%8E%E0%B0%82%E0%B0%AA%E0%B1%803" title="ఎంపీ3 - telugu" lang="te" hreflang="te" data-title="ఎంపీ3" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AD%E0%B9%87%E0%B8%A1%E0%B8%9E%E0%B8%B53" title="เอ็มพี3 - tai" lang="th" hreflang="th" data-title="เอ็มพี3" data-language-autonym="ไทย" data-language-local-name="tai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/MP3" title="MP3 - tagal" lang="tl" hreflang="tl" data-title="MP3" data-language-autonym="Tagalog" data-language-local-name="tagal" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/MP3" title="MP3 - turc" lang="tr" hreflang="tr" data-title="MP3" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/MP3" title="MP3 - ucraïnès" lang="uk" hreflang="uk" data-title="MP3" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/MP3" title="MP3 - vènet" lang="vec" hreflang="vec" data-title="MP3" data-language-autonym="Vèneto" data-language-local-name="vènet" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/MP3" title="MP3 - vietnamita" lang="vi" hreflang="vi" data-title="MP3" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/MP3" title="MP3 - xinès wu" lang="wuu" hreflang="wuu" data-title="MP3" data-language-autonym="吴语" data-language-local-name="xinès wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/MP3" title="MP3 - ídix" lang="yi" hreflang="yi" data-title="MP3" data-language-autonym="ייִדיש" data-language-local-name="ídix" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/MP3" title="MP3 - ioruba" lang="yo" hreflang="yo" data-title="MP3" data-language-autonym="Yorùbá" data-language-local-name="ioruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/MP3" title="MP3 - xinès" lang="zh" hreflang="zh" data-title="MP3" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/MP3" title="MP3 - xinès min del sud" lang="nan" hreflang="nan" data-title="MP3" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="xinès min del sud" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/MP3" title="MP3 - cantonès" lang="yue" hreflang="yue" data-title="MP3" data-language-autonym="粵語" data-language-local-name="cantonès" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q42591#sitelinks-wikipedia" title="Modifica enllaços interlingües" class="wbc-editpage">Modifica els enllaços</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espais de noms"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/MP3" title="Vegeu el contingut de la pàgina [c]" accesskey="c"><span>Pàgina</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussi%C3%B3:MP3" rel="discussion" title="Discussió sobre el contingut d'aquesta pàgina [t]" accesskey="t"><span>Discussió</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Canvia la variant de llengua" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">català</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vistes"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/MP3"><span>Mostra</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=MP3&action=edit" title="Modifica el codi font d'aquesta pàgina [e]" accesskey="e"><span>Modifica</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=MP3&action=history" title="Versions antigues d'aquesta pàgina [h]" accesskey="h"><span>Mostra l'historial</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Eines de la pàgina"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Eines" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Eines</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Eines</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">amaga</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Més opcions" > <div class="vector-menu-heading"> Accions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/MP3"><span>Mostra</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=MP3&action=edit" title="Modifica el codi font d'aquesta pàgina [e]" accesskey="e"><span>Modifica</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=MP3&action=history"><span>Mostra l'historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:Enlla%C3%A7os/MP3" title="Una llista de totes les pàgines wiki que enllacen amb aquesta [j]" accesskey="j"><span>Què hi enllaça</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:Seguiment/MP3" rel="nofollow" title="Canvis recents a pàgines enllaçades des d'aquesta pàgina [k]" accesskey="k"><span>Canvis relacionats</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=MP3&oldid=34797568" title="Enllaç permanent a aquesta revisió de la pàgina"><span>Enllaç permanent</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=MP3&action=info" title="Més informació sobre aquesta pàgina"><span>Informació de la pàgina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citau&page=MP3&id=34797568&wpFormIdentifier=titleform" title="Informació sobre com citar aquesta pàgina"><span>Citau aquest article</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:UrlShortener&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FMP3"><span>Obtén una URL abreujada</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrCode&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FMP3"><span>Descarrega el codi QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprimeix/exporta </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Llibre&bookcmd=book_creator&referer=MP3"><span>Crea un llibre</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=MP3&action=show-download-screen"><span>Baixa com a PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=MP3&printable=yes" title="Versió per a impressió d'aquesta pàgina [p]" accesskey="p"><span>Versió per a impressora</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> En altres projectes </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:MP3" hreflang="en"><span>Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q42591" title="Enllaç a l'element del repositori de dades connectat [g]" accesskey="g"><span>Element a Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Eines de la pàgina"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aparença</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">amaga</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Viquipèdia, l'enciclopèdia lliure</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ca" dir="ltr"><table class="infobox" style="font-size:90%;width:25em"><caption style="font-weight:bold;background-color:#b0d1ad"><span style="float:left;"><span typeof="mw:File"><span title="Infotaula de format de fitxer"><img alt="Infotaula de format de fitxer" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Octicons-file-code.svg/20px-Octicons-file-code.svg.png" decoding="async" width="20" height="27" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Octicons-file-code.svg/30px-Octicons-file-code.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Octicons-file-code.svg/40px-Octicons-file-code.svg.png 2x" data-file-width="768" data-file-height="1024" /></span></span></span>MPEG-1 Audio Layer 3</caption><tbody><tr><td colspan="2" class="infobox-full-data infobox-data" style="text-align:center"><span typeof="mw:File"><a href="/w/index.php?title=Fitxer:Mp3.svg&lang=ca" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Mp3.svg/langca-150px-Mp3.svg.png" decoding="async" width="150" height="76" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Mp3.svg/langca-225px-Mp3.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Mp3.svg/langca-300px-Mp3.svg.png 2x" data-file-width="917" data-file-height="463" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">Tipus</th><td class="infobox-data">Àudio</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">Extensió</th><td class="infobox-data">.mp3</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee"><a href="/wiki/MIME" class="mw-redirect" title="MIME">MIME</a></th><td class="infobox-data">audio/mpeg</td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">Magic number</th><td class="infobox-data">494433 <span class="penicon" data-bridge-edit-flow="single-best-value"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q42591?uselang=ca#P4152" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee"><a href="/wiki/Desenvolupador_de_programari" title="Desenvolupador de programari">Desenvolupador</a></th><td class="infobox-data"><a href="/wiki/Institut_Fraunhofer" title="Institut Fraunhofer">Fraunhofer-Gesellschaft</a>, <a href="/wiki/Karlheinz_Brandenburg" title="Karlheinz Brandenburg">Karlheinz Brandenburg</a>, <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q22670767" class="extiw" title="d:Special:EntityPage/Q22670767">Heinz Gerhäuser</a>, <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q122757" class="extiw" title="d:Special:EntityPage/Q122757">Bernhard Grill</a> i <a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1409632" class="extiw" title="d:Special:EntityPage/Q1409632">Harald Popp</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q42591?uselang=ca#P178" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee"><a href="/wiki/Est%C3%A0ndard_internacional" class="mw-redirect" title="Estàndard internacional">Estàndard</a></th><td class="infobox-data">ISO/IEC 11172-3, ISO/IEC 13818-3</td></tr><tr><th colspan="2" class="infobox-header" style="text-align:center;background-color:#b0d1ad">Més informació</th></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">Stack Exchange</th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://stackoverflow.com/tags/mp3">Etiqueta</a>, <a rel="nofollow" class="external text" href="https://ja.stackoverflow.com/tags/mp3">Etiqueta</a>, <a rel="nofollow" class="external text" href="https://superuser.com/tags/mp3">Etiqueta</a> i <a rel="nofollow" class="external text" href="https://sound.stackexchange.com/tags/mp3">Etiqueta</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q42591?uselang=ca#P1482" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">Wiki del format de fitxer</th><td class="infobox-data"><a rel="nofollow" class="external text" href="http://fileformats.archiveteam.org/wiki/MP3">MP3</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q42591?uselang=ca#P3381" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">LocFDD</th><td class="infobox-data"><a rel="nofollow" class="external text" href="http://www.digitalpreservation.gov/formats/fdd/fdd000012.shtml">fdd000012</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q42591?uselang=ca#P3266" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="text-align:left;background:#eeeeee">PRONOM</th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://www.nationalarchives.gov.uk/pronom/fmt/134">fmt/134</a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q42591?uselang=ca#P2748" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span></td></tr></tbody></table> <p><i><b>MPEG-1 Audio Layer III</b></i> o <b><a rel="nofollow" class="external text" href="https://convertor.tools/mp3-to-ogg">mp3 to ogg</a></b> és un format d'àudio digital basat en la compressió amb pèrdues, desenvolupat pel grup d'experts <a href="/w/index.php?title=Media_Picture_Group&action=edit&redlink=1" class="new" title="Media Picture Group (encara no existeix)">Media Picture Group</a> (<a href="/wiki/MPEG" title="MPEG">MPEG</a>) i descrit per una norma <a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>. </p><p><a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a> Audio o Part 3 està dissenyat per a l'emmagatzematge i distribució d'àudio en temps real. <b>MP3</b> és un dels nivells de compressió d'aquest estàndard, concretament el nivell o capa 3. Aquest nivell és el que té més complexitat i pot aconseguir un <a href="/wiki/Bitrate" class="mw-redirect" title="Bitrate">bitrate</a> d'uns 192 kbps, per aquest motiu el seu ús més freqüent és la transmissió per XDSI i xarxes <a href="/wiki/TCP/IP" title="TCP/IP">TCP/IP</a>. </p><p>L'objectiu de l'algoritme de compressió d'aquest format és poder comprimir qualsevol senyal que estigui destinat a ser escoltat i explotar al màxim les limitacions del <a href="/wiki/Sistema_auditiu" title="Sistema auditiu">Sistema Auditiu Humà</a> o <i>SAH</i>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Codificador">Codificador</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=1" title="Modifica la secció: Codificador"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Les tècniques emprades en la codificació MPEG són: </p> <ul><li>Models perceptuals</li> <li>Assignació dinàmica de bits</li> <li>Commutació de finestres</li></ul> <p>Els blocs del codificador són: </p> <ul><li>Anàlisis per filtres</li> <li>Transformada MDCT amb <a href="/wiki/Enfinestrament" title="Enfinestrament">enfinestrament</a>.</li> <li><a href="/wiki/FFT" class="mw-redirect" title="FFT">FFT</a></li> <li><a href="/wiki/Emmascarament_temporal" title="Emmascarament temporal">Emmascarament temporal</a> i <a href="/wiki/Emmascarament_freq%C3%BCencial" title="Emmascarament freqüencial">freqüencial</a></li> <li>Escalabilitat i <a href="/wiki/Quantificaci%C3%B3_(processament_d%27%C3%A0udio)" title="Quantificació (processament d'àudio)">quantificació</a></li> <li><a href="/wiki/Codificaci%C3%B3_de_Huffman" title="Codificació de Huffman">Codificació de Huffman</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="Banc_de_Filtres">Banc de Filtres</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=2" title="Modifica la secció: Banc de Filtres"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b>MP3</b> utilitza 32 banc de filtres híbrids col·locats en cascada. Aquest filtres són <a href="/w/index.php?title=Polif%C3%A0sics&action=edit&redlink=1" class="new" title="Polifàsics (encara no existeix)">polifàsics</a>, és a dir, amb un retard baix i incorporen una transformada <a href="/w/index.php?title=Transformada_de_Discreta_de_Cosinus_Modificada&action=edit&redlink=1" class="new" title="Transformada de Discreta de Cosinus Modificada (encara no existeix)">Transformada de Discreta de Cosinus Modificada</a> amb un nombre màxim de punts de 576. Degut a l'aplicació de la MDCT es pot eliminar informació redundant. </p> <div class="mw-heading mw-heading3"><h3 id="Transformació_en_freqüència"><span id="Transformaci.C3.B3_en_freq.C3.BC.C3.A8ncia"></span>Transformació en freqüència</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=3" title="Modifica la secció: Transformació en freqüència"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La transformada utilitzada en la codificació és la <a href="/w/index.php?title=Transformada_de_Discreta_de_Cosinus_Modificada&action=edit&redlink=1" class="new" title="Transformada de Discreta de Cosinus Modificada (encara no existeix)">Transformada de Discreta de Cosinus Modificada</a> (MDCT). Aquesta transformació incorpora un <a href="/wiki/Enfinestrament" title="Enfinestrament">enfinestrament</a> per tal d'evitar pre-ecos produïts per un nombre de mostres de la transformada elevat en les zones de silenci-percussió. Aquest <a href="/wiki/Enfinestrament" title="Enfinestrament">enfinestrament</a> es realitza mitjançant quatre tipus de finestres segons sigui el senyal: </p> <ul><li>Finestra normal o llarga <ul><li>576 mostres</li> <li>Simètrica</li> <li>Zona homogènia</li></ul></li> <li>Finestra d'inici <ul><li>480 mostres</li> <li>Asimètrica</li> <li>Zona de transició</li></ul></li> <li>Finestra de parada <ul><li>480 mostres</li> <li>Asimètrica</li> <li>Zona de transició</li></ul></li> <li>Finestra curta <ul><li>196 mostres</li> <li>Simètrica</li> <li>Zona homogènia</li></ul></li></ul> <p>Per passar de finestra normal o llarga a finestra curta sempre s'ha de passar per les finestres de transició. </p> <div class="mw-heading mw-heading3"><h3 id="Emmascarament_temporal_i_freqüencial"><span id="Emmascarament_temporal_i_freq.C3.BCencial"></span>Emmascarament temporal i freqüencial</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=4" title="Modifica la secció: Emmascarament temporal i freqüencial"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Degut a les limitacions del <a href="/wiki/Sistema_auditiu" title="Sistema auditiu">SAH</a> es pot definir un model <a href="/wiki/Psicoac%C3%BAstica" title="Psicoacústica">psicoacústic</a>. Aquest model parteix de descompondre el senyal com les <a href="/wiki/Bandes_cr%C3%ADtiques" class="mw-redirect" title="Bandes crítiques">bandes crítiques</a> de l'<a href="/wiki/O%C3%AFda" title="Oïda">oïda</a> humana. Per tal de poder eliminar informació per emmascarament s'utilitza una <a href="/wiki/Transformada_de_Fourier" title="Transformada de Fourier">transformada de Fourier</a> (FFT) de 576 punts. </p><p>En aquest bloc es defineix el llindar per tal de saber quins tons es consideren emmascarats i, per tant, no audibles, i així utilitzar aquest informació per tal de fer la quantificació. Aquest senyal emmascarat pot ser causat per senyals de baix nivell, soroll de quantificació, distorsió de solapament o errors de transmissió. </p> <div class="mw-heading mw-heading4"><h4 id="Emmascarament_freqüencial"><span id="Emmascarament_freq.C3.BCencial"></span>Emmascarament freqüencial</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=5" title="Modifica la secció: Emmascarament freqüencial"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Un <a href="/wiki/So" title="So">so</a> pot ser emmascarat pel fet que dins la mateixa banda crítica hi hagi un altre so amb un nivell més elevat. Existeixen quatre tipus de fenòmens en què es produeix aquest emmascarament: </p> <ul><li>To – To</li> <li>Soroll – To</li> <li>To – Soroll</li> <li>Soroll – Soroll</li></ul> <div class="mw-heading mw-heading4"><h4 id="Emmascarament_temporal">Emmascarament temporal</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=6" title="Modifica la secció: Emmascarament temporal"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>El <a href="/wiki/Sistema_auditiu" title="Sistema auditiu">SAH</a> té memoria auditiva per aquest motiu apareix el fenomen d'emmascarament temporal. Aquest fenomen apareix quant dos tons apareixen distanciats per un interval de temps molt petit i un dels tons té un nivell molt més elevat que l'altre. L'emmascarament anterior és més breu que el posterior. </p> <div class="mw-heading mw-heading3"><h3 id="Escalabilitat_i_Quantificació"><span id="Escalabilitat_i_Quantificaci.C3.B3"></span>Escalabilitat i Quantificació</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=7" title="Modifica la secció: Escalabilitat i Quantificació"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Els llindars d'emmascarament són utilitzats per determinar quina assignació de bits correspon a cada banda crítica. El codificador el que busca és trobar una assignació de bits el més constant possible. </p> <div class="mw-heading mw-heading3"><h3 id="Codificació_de_Huffmann"><span id="Codificaci.C3.B3_de_Huffmann"></span>Codificació de Huffmann</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=8" title="Modifica la secció: Codificació de Huffmann"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Els <a href="/wiki/Bits" class="mw-redirect" title="Bits">bits</a> quantificats són codificats amb Huffman i emmagatzemades a la cadena de bits amb els seus factors d'escala i la seva informació lateral. Aquesta informació lateral incorpora els paràmetres que necessita el descodificador com poden ser la taula de Huffman, la commutació de finestres i el control de guany. </p> <div class="mw-heading mw-heading2"><h2 id="Descodificador">Descodificador</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=9" title="Modifica la secció: Descodificador"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>El <a href="/wiki/Descodificador" title="Descodificador">descodificador</a> ha de recuperar un senyal sintetitzat del senyal d'àudio <a href="/wiki/PCM" class="mw-redirect" title="PCM">PCM</a> d'entrada al <a href="/wiki/Codificador" title="Codificador">codificador</a>. </p><p>Els seus blocs són: </p> <ul><li>Descodificador de Huffman.</li> <li>Desquantificador.</li> <li>MDCT inversa amb enfinestrament.</li> <li>Filtre de síntesi.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Estructura_MP3">Estructura MP3</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=10" title="Modifica la secció: Estructura MP3"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Els quadres <b>MP3</b> són de 1152 mostres més el camp de <a href="/wiki/ID3" title="ID3">ID3</a>. Aquestes mostres estan compostes pels següents camps: </p> <table class="wikitable"> <tbody><tr> <td><b>Camp</b></td> <td><b>Mida</b></td> <td><b>Descripció</b> </td></tr> <tr> <td><b>Metadades</b></td> <td>-</td> <td>ID3v2 </td></tr> <tr> <td><b>Capçalera</b></td> <td>32 mostres</td> <td>Capçalera MP3 </td></tr> <tr> <td><b>CRC</b></td> <td>0 - 16 mostres</td> <td>Control d'errors </td></tr> <tr> <td><b>Informació Lateral</b></td> <td>136 – 256 mostres</td> <td>Informació lateral per tal de realitzar la descodificació </td></tr> <tr> <td><b>Dades</b></td> <td>-</td> <td>Informació d'àudio </td></tr> <tr> <td><b>Metadades</b></td> <td>128 bytes</td> <td>ID3v1 </td></tr></tbody></table> <p><br /> Les 32 mostres de la capçalera es descomponen: </p> <table class="wikitable"> <tbody><tr> <td><b>Camp</b></td> <td><b>Valor</b> </td></tr> <tr> <td>Paraula de sincronització</td> <td>111111111111 </td></tr> <tr> <td>ID</td> <td>1 (MPEG) </td></tr> <tr> <td>Capa</td> <td>01 (Capa 3) </td></tr> <tr> <td>Protecció d'errors</td> <td>1 (No) </td></tr> <tr> <td>Índex de taxa de bits</td> <td>- </td></tr> <tr> <td>Freqüència</td> <td>00 (44100 Hz) </td></tr> <tr> <td>Padding Bit</td> <td>0 (No) </td></tr> <tr> <td>Bit privat</td> <td>- </td></tr> <tr> <td>Freqüència</td> <td>00 (44100 Hz) </td></tr> <tr> <td>Mode</td> <td>- </td></tr> <tr> <td>Extensió de Mode</td> <td>- </td></tr> <tr> <td>Còpia</td> <td>0 (No drets d'autor) </td></tr> <tr> <td>Original/Còpia</td> <td>0 (Còpia) </td></tr> <tr> <td>Èmfasi</td> <td>00 (Sense èmfasi) </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Taxa_de_bits">Taxa de bits</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=11" title="Modifica la secció: Taxa de bits"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>MP3 permet les taxes de bits següents: </p> <ul><li>32 kbps</li> <li>40 kbps</li> <li>48 kbps</li> <li>56 kbps</li> <li>64 kbps</li> <li>80 kbps</li> <li>96 kbps</li> <li>112 kbps</li> <li>128 kbps</li> <li>160 kbps</li> <li>192 kbps</li> <li>224 kbps</li> <li>256 kbps</li> <li>320 kbps</li></ul> <p>Les freqüències disponibles són: </p> <ul><li>32 kHz</li> <li>44100 Hz</li> <li>48 kHz</li></ul> <p>Es pot considerar que a partir d'una taxa de bits de 128 kbps obtenim una qualitat semblant a la del CD amb un factor de compressió d'11:1. </p> <div class="mw-heading mw-heading2"><h2 id="Vegeu_també"><span id="Vegeu_tamb.C3.A9"></span>Vegeu també</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=12" title="Modifica la secció: Vegeu també"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/ID3" title="ID3">ID3</a>.</li> <li><a href="/wiki/C%C3%B2dec_d%27%C3%A0udio" title="Còdec d'àudio">Còdec d'àudio</a>.</li> <li><a href="/wiki/Muziic" title="Muziic">Muziic</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Enllaços_externs"><span id="Enlla.C3.A7os_externs"></span>Enllaços externs</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MP3&action=edit&section=13" title="Modifica la secció: Enllaços externs"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r33663753">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output 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href="https://commons.wikimedia.org/wiki/P%C3%A0gina_principal?uselang=ca">Wikimedia Commons</a></span> hi ha contingut multimèdia relatiu a: <i><b><a href="https://commons.wikimedia.org/wiki/Category:MP3" class="extiw" title="commons:Category:MP3">MP3</a></b></i></div></div> </div> <ul><li><a rel="nofollow" class="external free" href="http://www.chiariglione.org/mpeg/">http://www.chiariglione.org/mpeg/</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20081109215716/http://www.chiariglione.org/mpeg/">Arxivat</a> 2008-11-09 a <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>.</li> <li><a rel="nofollow" class="external free" href="http://www.mpeg.org/">http://www.mpeg.org/</a></li> <li><a rel="nofollow" class="external free" href="http://www.iso.org/">http://www.iso.org/</a></li></ul> <div role="navigation" class="navbox" aria-labelledby="Compressió_de_dades_de_formats_multimèdia" style="padding:3px"><table class="nowraplinks collapsible collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div class="plainlinks hlist navbar mini"><ul><li class="nv-view"><span typeof="mw:File"><a href="/wiki/Plantilla:Formats_de_compressi%C3%B3" title="Plantilla:Formats de compressió"><img alt="Vegeu aquesta plantilla" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/28/Commons-emblem-notice.svg/18px-Commons-emblem-notice.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/28/Commons-emblem-notice.svg/27px-Commons-emblem-notice.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/28/Commons-emblem-notice.svg/36px-Commons-emblem-notice.svg.png 2x" data-file-width="48" data-file-height="48" /></a></span></li></ul></div><div id="Compressió_de_dades_de_formats_multimèdia" style="font-size:114%;margin:0 4em"><a href="/wiki/Compressi%C3%B3_de_dades" title="Compressió de dades">Compressió de dades</a> de formats <a href="/wiki/Multim%C3%A8dia" title="Multimèdia">multimèdia</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Compressi%C3%B3_de_v%C3%ADdeo" title="Compressió de vídeo">Compressió de vídeo</a></th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/International_Organization_for_Standardization" class="mw-redirect" title="International Organization for Standardization">ISO</a>, <a href="/wiki/International_Electrotechnical_Commission" class="mw-redirect" title="International Electrotechnical Commission">IEC</a>, <a href="/wiki/MPEG" title="MPEG">MPEG</a></div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Motion_JPEG&action=edit&redlink=1" class="new" title="Motion JPEG (encara no existeix)">MJPEG</a></li> <li><a href="/w/index.php?title=Motion_JPEG_2000&action=edit&redlink=1" class="new" title="Motion JPEG 2000 (encara no existeix)">Motion JPEG 2000</a></li> <li><a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a></li> <li><a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a> <ul><li><a href="/w/index.php?title=H.262/MPEG-2_Part_2&action=edit&redlink=1" class="new" title="H.262/MPEG-2 Part 2 (encara no existeix)">Part 2</a></li></ul></li> <li><a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4</a> <ul><li><a href="/w/index.php?title=MPEG-4_Part_2&action=edit&redlink=1" class="new" title="MPEG-4 Part 2 (encara no existeix)">Part 2 / ASP</a></li> <li><a href="/wiki/H.264/MPEG-4_AVC" title="H.264/MPEG-4 AVC">Part 10 / AVC</a></li> <li><a href="/w/index.php?title=MPEG-4_IVC&action=edit&redlink=1" class="new" title="MPEG-4 IVC (encara no existeix)">Part 33 / IVC</a></li></ul></li> <li><a href="/w/index.php?title=MPEG-H&action=edit&redlink=1" class="new" title="MPEG-H (encara no existeix)">MPEG-H</a> <ul><li><a href="/wiki/H.265" title="H.265">Part 2 / HEVC</a></li></ul></li> <li><a href="/w/index.php?title=MPEG-I&action=edit&redlink=1" class="new" title="MPEG-I (encara no existeix)">MPEG-I</a> <ul><li><a href="/wiki/H.266" title="H.266">Part 3 / VVC</a></li></ul></li> <li><a href="/w/index.php?title=MPEG-5&action=edit&redlink=1" class="new" title="MPEG-5 (encara no existeix)">MPEG-5</a> <ul><li><a href="/w/index.php?title=Essential_Video_Coding&action=edit&redlink=1" class="new" title="Essential Video Coding (encara no existeix)">Part 1 / EVC</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/ITU-T" class="mw-redirect" title="ITU-T">ITU-T</a>, <a href="/w/index.php?title=Video_Coding_Experts_Group&action=edit&redlink=1" class="new" title="Video Coding Experts Group (encara no existeix)">VCEG</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=H.120&action=edit&redlink=1" class="new" title="H.120 (encara no existeix)">H.120</a></li> <li><a href="/w/index.php?title=Discrete_cosine_transform&action=edit&redlink=1" class="new" title="Discrete cosine transform (encara no existeix)">DCT</a> <ul><li><a href="/wiki/H.261" title="H.261">H.261</a></li> <li><a href="/w/index.php?title=H.262/MPEG-2_Part_2&action=edit&redlink=1" class="new" title="H.262/MPEG-2 Part 2 (encara no existeix)">H.262</a></li> <li><a href="/w/index.php?title=H.263&action=edit&redlink=1" class="new" title="H.263 (encara no existeix)">H.263</a></li> <li><a href="/wiki/Advanced_Video_Coding" class="mw-redirect" title="Advanced Video Coding">H.264 / AVC</a></li> <li><a href="/w/index.php?title=High_Efficiency_Video_Coding&action=edit&redlink=1" class="new" title="High Efficiency Video Coding (encara no existeix)">H.265 / HEVC</a></li> <li><a href="/wiki/Versatile_Video_Coding" class="mw-redirect" title="Versatile Video Coding">H.266 / VVC</a></li> <li><a href="/wiki/DV" class="mw-redirect" title="DV">DV</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/Society_of_Motion_Picture_and_Television_Engineers" class="mw-redirect" title="Society of Motion Picture and Television Engineers">SMPTE</a></div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/VC-1" title="VC-1">VC-1</a></li> <li><a href="/w/index.php?title=Dirac_(codec)&action=edit&redlink=1" class="new" title="Dirac (codec) (encara no existeix)">VC-2</a></li> <li><a href="/w/index.php?title=Avid_DNxHD&action=edit&redlink=1" class="new" title="Avid DNxHD (encara no existeix)">VC-3</a></li> <li><a href="/w/index.php?title=CineForm&action=edit&redlink=1" class="new" title="CineForm (encara no existeix)">VC-5</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/On2_Technologies" title="On2 Technologies">TrueMotion</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/On2_Technologies#TrueMotion_S" title="On2 Technologies">TrueMotion S</a></li> <li><a href="/w/index.php?title=Discrete_cosine_transform&action=edit&redlink=1" class="new" title="Discrete cosine transform (encara no existeix)">DCT</a> <ul><li><a href="/wiki/VP3" title="VP3">VP3</a></li> <li><a href="/w/index.php?title=VP6&action=edit&redlink=1" class="new" title="VP6 (encara no existeix)">VP6</a></li> <li><a href="/w/index.php?title=VP7&action=edit&redlink=1" class="new" title="VP7 (encara no existeix)">VP7</a></li> <li><a href="/wiki/VP8" title="VP8">VP8</a></li> <li><a href="/wiki/VP9" title="VP9">VP9</a></li> <li><a href="/wiki/AV1" title="AV1">AV1</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;">Altres</div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Apple_Video&action=edit&redlink=1" class="new" title="Apple Video (encara no existeix)">Apple Video</a></li> <li><a href="/w/index.php?title=Audio_Video_Standard&action=edit&redlink=1" class="new" title="Audio Video Standard (encara no existeix)">AVS</a></li> <li><a href="/w/index.php?title=Bink_Video&action=edit&redlink=1" class="new" title="Bink Video (encara no existeix)">Bink</a></li> <li><a href="/w/index.php?title=Cinepak&action=edit&redlink=1" class="new" title="Cinepak (encara no existeix)">Cinepak</a></li> <li><a href="/w/index.php?title=Daala&action=edit&redlink=1" class="new" title="Daala (encara no existeix)">Daala</a></li> <li><a href="/w/index.php?title=Digital_Video_Interactive&action=edit&redlink=1" class="new" title="Digital Video Interactive (encara no existeix)">DVI</a></li> <li><a href="/w/index.php?title=FFV1&action=edit&redlink=1" class="new" title="FFV1 (encara no existeix)">FFV1</a></li> <li><a href="/w/index.php?title=Huffyuv&action=edit&redlink=1" class="new" title="Huffyuv (encara no existeix)">Huffyuv</a></li> <li><a href="/w/index.php?title=Indeo&action=edit&redlink=1" class="new" title="Indeo (encara no existeix)">Indeo</a></li> <li><a href="/w/index.php?title=Lagarith&action=edit&redlink=1" class="new" title="Lagarith (encara no existeix)">Lagarith</a></li> <li><a href="/w/index.php?title=Microsoft_Video_1&action=edit&redlink=1" class="new" title="Microsoft Video 1 (encara no existeix)">Microsoft Video 1</a></li> <li><a href="/w/index.php?title=MSU_Lossless_Video_Codec&action=edit&redlink=1" class="new" title="MSU Lossless Video Codec (encara no existeix)">MSU Lossless</a></li> <li><a href="/w/index.php?title=OMS_Video&action=edit&redlink=1" class="new" title="OMS Video (encara no existeix)">OMS Video</a></li> <li><a href="/w/index.php?title=Pixlet&action=edit&redlink=1" class="new" title="Pixlet (encara no existeix)">Pixlet</a></li> <li><a href="/w/index.php?title=ProRes_422&action=edit&redlink=1" class="new" title="ProRes 422 (encara no existeix)">ProRes 422</a></li> <li><a href="/w/index.php?title=ProRes_4444&action=edit&redlink=1" class="new" title="ProRes 4444 (encara no existeix)">ProRes 4444</a></li> <li>QuickTime <ul><li><a href="/w/index.php?title=QuickTime_Animation&action=edit&redlink=1" class="new" title="QuickTime Animation (encara no existeix)">Animation</a></li> <li><a href="/w/index.php?title=QuickTime_Graphics&action=edit&redlink=1" class="new" title="QuickTime Graphics (encara no existeix)">Graphics</a></li></ul></li> <li><a href="/w/index.php?title=RealVideo&action=edit&redlink=1" class="new" title="RealVideo (encara no existeix)">RealVideo</a></li> <li><a href="/w/index.php?title=RTVideo&action=edit&redlink=1" class="new" title="RTVideo (encara no existeix)">RTVideo</a></li> <li><a href="/w/index.php?title=SheerVideo&action=edit&redlink=1" class="new" title="SheerVideo (encara no existeix)">SheerVideo</a></li> <li><a href="/w/index.php?title=Smacker_video&action=edit&redlink=1" class="new" title="Smacker video (encara no existeix)">Smacker</a></li> <li><a href="/w/index.php?title=Sorenson_Media&action=edit&redlink=1" class="new" title="Sorenson Media (encara no existeix)">Sorenson Video/Spark</a></li> <li><a href="/wiki/Theora" title="Theora">Theora</a></li> <li><a href="/w/index.php?title=Thor_(video_codec)&action=edit&redlink=1" class="new" title="Thor (video codec) (encara no existeix)">Thor</a></li> <li><a href="/wiki/Windows_Media_Video" title="Windows Media Video">WMV</a></li> <li><a href="/wiki/RatDVD" title="RatDVD">XEB</a></li> <li><a href="/w/index.php?title=YULS&action=edit&redlink=1" class="new" title="YULS (encara no existeix)">YULS</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Compressi%C3%B3_d%27%C3%A0udio" title="Compressió d'àudio">Compressió d'àudio</a></th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/International_Organization_for_Standardization" class="mw-redirect" title="International Organization for Standardization">ISO</a>, <a href="/wiki/International_Electrotechnical_Commission" class="mw-redirect" title="International Electrotechnical Commission">IEC</a>, <a href="/w/index.php?title=Moving_Picture_Experts_Group&action=edit&redlink=1" class="new" title="Moving Picture Experts Group (encara no existeix)">MPEG</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=MPEG-1_Audio_Layer_II&action=edit&redlink=1" class="new" title="MPEG-1 Audio Layer II (encara no existeix)">MPEG-1 Layer II</a> <ul><li><a href="/w/index.php?title=MPEG_Multichannel&action=edit&redlink=1" class="new" title="MPEG Multichannel (encara no existeix)">Multichannel</a></li></ul></li> <li><a href="/w/index.php?title=MPEG-1_Audio_Layer_I&action=edit&redlink=1" class="new" title="MPEG-1 Audio Layer I (encara no existeix)">MPEG-1 Layer I</a></li> <li><a class="mw-selflink selflink">MPEG-1 Layer III (MP3)</a></li> <li><a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a> <ul><li><a href="/wiki/HE-AAC" title="HE-AAC">HE-AAC</a></li> <li><a href="/wiki/LD-AAC" title="LD-AAC">LD-AAC</a></li></ul></li> <li><a href="/w/index.php?title=MPEG_Surround&action=edit&redlink=1" class="new" title="MPEG Surround (encara no existeix)">MPEG Surround</a></li> <li><a href="/w/index.php?title=Audio_Lossless_Coding&action=edit&redlink=1" class="new" title="Audio Lossless Coding (encara no existeix)">MPEG-4 ALS</a></li> <li><a href="/w/index.php?title=MPEG-4_SLS&action=edit&redlink=1" class="new" title="MPEG-4 SLS (encara no existeix)">MPEG-4 SLS</a></li> <li><a href="/wiki/Super_Audio_CD#DST" title="Super Audio CD">MPEG-4 DST</a></li> <li><a href="/w/index.php?title=Harmonic_Vector_Excitation_Coding&action=edit&redlink=1" class="new" title="Harmonic Vector Excitation Coding (encara no existeix)">MPEG-4 HVXC</a></li> <li><a href="/w/index.php?title=Code-excited_linear_prediction&action=edit&redlink=1" class="new" title="Code-excited linear prediction (encara no existeix)">MPEG-4 CELP</a></li> <li><a href="/w/index.php?title=Unified_Speech_and_Audio_Coding&action=edit&redlink=1" class="new" title="Unified Speech and Audio Coding (encara no existeix)">MPEG-D USAC</a></li> <li><a href="/w/index.php?title=MPEG-H_3D_Audio&action=edit&redlink=1" class="new" title="MPEG-H 3D Audio (encara no existeix)">MPEG-H 3D Audio</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/ITU-T" class="mw-redirect" title="ITU-T">ITU-T</a></div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/G.711" title="G.711">G.711</a> <ul><li><a href="/w/index.php?title=Llei_A&action=edit&redlink=1" class="new" title="Llei A (encara no existeix)">Llei A</a></li> <li><a href="/wiki/Llei_Mu" title="Llei Mu">Llei Mu</a></li></ul></li> <li><a href="/w/index.php?title=G.718&action=edit&redlink=1" class="new" title="G.718 (encara no existeix)">G.718</a></li> <li><a href="/w/index.php?title=G.719&action=edit&redlink=1" class="new" title="G.719 (encara no existeix)">G.719</a></li> <li><a href="/wiki/G.722" title="G.722">G.722</a></li> <li><a href="/w/index.php?title=G.722.1&action=edit&redlink=1" class="new" title="G.722.1 (encara no existeix)">G.722.1</a></li> <li><a href="/w/index.php?title=Adaptive_Multi-Rate_Wideband&action=edit&redlink=1" class="new" title="Adaptive Multi-Rate Wideband (encara no existeix)">G.722.2</a></li> <li><a href="/w/index.php?title=G.723&action=edit&redlink=1" class="new" title="G.723 (encara no existeix)">G.723</a></li> <li><a href="/w/index.php?title=G.723.1&action=edit&redlink=1" class="new" title="G.723.1 (encara no existeix)">G.723.1</a></li> <li><a href="/wiki/G.726" title="G.726">G.726</a></li> <li><a href="/w/index.php?title=G.728&action=edit&redlink=1" class="new" title="G.728 (encara no existeix)">G.728</a></li> <li><a href="/wiki/G.729" title="G.729">G.729</a></li> <li><a href="/w/index.php?title=G.729.1&action=edit&redlink=1" class="new" title="G.729.1 (encara no existeix)">G.729.1</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Opus_(codec)&action=edit&redlink=1" class="new" title="Opus (codec) (encara no existeix)">Opus</a></li> <li><a href="/w/index.php?title=Internet_Low_Bitrate_Codec&action=edit&redlink=1" class="new" title="Internet Low Bitrate Codec (encara no existeix)">iLBC</a></li> <li><a href="/wiki/Speex" title="Speex">Speex</a></li> <li><a href="/wiki/Vorbis" class="mw-redirect" title="Vorbis">Vorbis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/3GPP" title="3GPP">3GPP</a></div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Compressi%C3%B3_multi-taxa_adaptativa&action=edit&redlink=1" class="new" title="Compressió multi-taxa adaptativa (encara no existeix)">AMR</a></li> <li><a href="/w/index.php?title=Adaptive_Multi-Rate_Wideband&action=edit&redlink=1" class="new" title="Adaptive Multi-Rate Wideband (encara no existeix)">AMR-WB</a></li> <li><a href="/w/index.php?title=Extended_Adaptive_Multi-Rate_%E2%80%93_Wideband&action=edit&redlink=1" class="new" title="Extended Adaptive Multi-Rate – Wideband (encara no existeix)">AMR-WB+</a></li> <li><a href="/w/index.php?title=Enhanced_Variable_Rate_Codec&action=edit&redlink=1" class="new" title="Enhanced Variable Rate Codec (encara no existeix)">EVRC</a></li> <li><a href="/w/index.php?title=Enhanced_Variable_Rate_Codec_B&action=edit&redlink=1" class="new" title="Enhanced Variable Rate Codec B (encara no existeix)">EVRC-B</a></li> <li><a href="/wiki/Enhanced_Voice_Services" title="Enhanced Voice Services">EVS</a></li> <li><a href="/w/index.php?title=Half_Rate&action=edit&redlink=1" class="new" title="Half Rate (encara no existeix)">GSM-HR</a></li> <li><a href="/w/index.php?title=Full_Rate&action=edit&redlink=1" class="new" title="Full Rate (encara no existeix)">GSM-FR</a></li> <li><a href="/w/index.php?title=Enhanced_full_rate&action=edit&redlink=1" class="new" title="Enhanced full rate (encara no existeix)">GSM-EFR</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/ETSI" class="mw-redirect" title="ETSI">ETSI</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/Dolby_Digital" title="Dolby Digital">AC-3</a></li> <li><a href="/w/index.php?title=Dolby_AC-4&action=edit&redlink=1" class="new" title="Dolby AC-4 (encara no existeix)">AC-4</a></li> <li><a href="/wiki/DTS_(sistema_de_so)" title="DTS (sistema de so)">DTS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;">Altres</div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Algebraic_code-excited_linear_prediction&action=edit&redlink=1" class="new" title="Algebraic code-excited linear prediction (encara no existeix)">ACELP</a></li> <li><a href="/w/index.php?title=Apple_Lossless&action=edit&redlink=1" class="new" title="Apple Lossless (encara no existeix)">ALAC</a></li> <li><a href="/w/index.php?title=Asao_(codec)&action=edit&redlink=1" class="new" title="Asao (codec) (encara no existeix)">Asao</a></li> <li><a href="/wiki/Adaptive_Transform_Acoustic_Coding" title="Adaptive Transform Acoustic Coding">ATRAC</a></li> <li><a href="/w/index.php?title=Audio_Video_Standard&action=edit&redlink=1" class="new" title="Audio Video Standard (encara no existeix)">AVS</a></li> <li><a href="/w/index.php?title=CELT&action=edit&redlink=1" class="new" title="CELT (encara no existeix)">CELT</a></li> <li><a href="/w/index.php?title=Codec_2&action=edit&redlink=1" class="new" title="Codec 2 (encara no existeix)">Codec 2</a></li> <li><a href="/w/index.php?title=Dynamic_Resolution_Adaptation&action=edit&redlink=1" class="new" title="Dynamic Resolution Adaptation (encara no existeix)">DRA</a></li> <li><a href="/wiki/FLAC" title="FLAC">FLAC</a></li> <li><a href="/w/index.php?title=Internet_Speech_Audio_Codec&action=edit&redlink=1" class="new" title="Internet Speech Audio Codec (encara no existeix)">iSAC</a></li> <li><a href="/w/index.php?title=Mixed-excitation_linear_prediction&action=edit&redlink=1" class="new" title="Mixed-excitation linear prediction (encara no existeix)">MELP</a></li> <li><a href="/w/index.php?title=Monkey%27s_Audio&action=edit&redlink=1" class="new" title="Monkey's Audio (encara no existeix)">Monkey's Audio</a></li> <li><a href="/w/index.php?title=MT9&action=edit&redlink=1" class="new" title="MT9 (encara no existeix)">MT9</a></li> <li><a href="/w/index.php?title=Musepack&action=edit&redlink=1" class="new" title="Musepack (encara no existeix)">Musepack</a></li> <li><a href="/w/index.php?title=OptimFROG&action=edit&redlink=1" class="new" title="OptimFROG (encara no existeix)">OptimFROG</a></li> <li><a href="/w/index.php?title=Original_Sound_Quality&action=edit&redlink=1" class="new" title="Original Sound Quality (encara no existeix)">OSQ</a></li> <li><a href="/w/index.php?title=Qualcomm_code-excited_linear_prediction&action=edit&redlink=1" class="new" title="Qualcomm code-excited linear prediction (encara no existeix)">QCELP</a></li> <li><a href="/w/index.php?title=Relaxed_code-excited_linear_prediction&action=edit&redlink=1" class="new" title="Relaxed code-excited linear prediction (encara no existeix)">RCELP</a></li> <li><a href="/wiki/RealAudio" title="RealAudio">RealAudio</a></li> <li><a href="/w/index.php?title=RTAudio&action=edit&redlink=1" class="new" title="RTAudio (encara no existeix)">RTAudio</a></li> <li><a href="/w/index.php?title=Avid_Audio&action=edit&redlink=1" class="new" title="Avid Audio (encara no existeix)">SD2</a></li> <li><a href="/w/index.php?title=Shorten_(format_de_fitxer)&action=edit&redlink=1" class="new" title="Shorten (format de fitxer) (encara no existeix)">SHN</a></li> <li><a href="/w/index.php?title=SILK&action=edit&redlink=1" class="new" title="SILK (encara no existeix)">SILK</a></li> <li><a href="/w/index.php?title=Siren_(codec)&action=edit&redlink=1" class="new" title="Siren (codec) (encara no existeix)">Siren</a></li> <li><a href="/w/index.php?title=Selectable_Mode_Vocoder&action=edit&redlink=1" class="new" title="Selectable Mode Vocoder (encara no existeix)">SMV</a></li> <li><a href="/w/index.php?title=SVOPC&action=edit&redlink=1" class="new" title="SVOPC (encara no existeix)">SVOPC</a></li> <li><a href="/w/index.php?title=TTA_(codec)&action=edit&redlink=1" class="new" title="TTA (codec) (encara no existeix)">TTA</a> <ul><li>True Audio</li></ul></li> <li><a href="/w/index.php?title=TwinVQ&action=edit&redlink=1" class="new" title="TwinVQ (encara no existeix)">TwinVQ</a></li> <li><a href="/w/index.php?title=Variable-Rate_Multimode_Wideband&action=edit&redlink=1" class="new" title="Variable-Rate Multimode Wideband (encara no existeix)">VMR-WB</a></li> <li><a href="/w/index.php?title=Vector_sum_excited_linear_prediction&action=edit&redlink=1" class="new" title="Vector sum excited linear prediction (encara no existeix)">VSELP</a></li> <li><a href="/w/index.php?title=WavPack&action=edit&redlink=1" class="new" title="WavPack (encara no existeix)">WavPack</a></li> <li><a href="/wiki/Windows_Media_Audio" title="Windows Media Audio">WMA</a></li> <li><a href="/w/index.php?title=Master_Quality_Authenticated&action=edit&redlink=1" class="new" title="Master Quality Authenticated (encara no existeix)">MQA</a></li> <li><a href="/w/index.php?title=AptX&action=edit&redlink=1" class="new" title="AptX (encara no existeix)">aptX</a></li> <li><a href="/w/index.php?title=AptX&action=edit&redlink=1" class="new" title="AptX (encara no existeix)">aptX HD</a></li> <li><a href="/w/index.php?title=AptX&action=edit&redlink=1" class="new" title="AptX (encara no existeix)">aptX Low Latency</a></li> <li><a href="/w/index.php?title=AptX&action=edit&redlink=1" class="new" title="AptX (encara no existeix)">aptX Adaptive</a></li> <li><a href="/w/index.php?title=LDAC_(codec)&action=edit&redlink=1" class="new" title="LDAC (codec) (encara no existeix)">LDAC</a></li> <li><a href="/w/index.php?title=LHDC_(codec)&action=edit&redlink=1" class="new" title="LHDC (codec) (encara no existeix)">LHDC</a></li> <li><a href="/w/index.php?title=LHDC_(codec)&action=edit&redlink=1" class="new" title="LHDC (codec) (encara no existeix)">LLAC</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Compressi%C3%B3_d%27imatges" class="mw-redirect" title="Compressió d'imatges">Compressió d'imatges</a></th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/International_Organization_for_Standardization" class="mw-redirect" title="International Organization for Standardization">ISO</a>/<a href="/wiki/International_Electrotechnical_Commission" class="mw-redirect" title="International Electrotechnical Commission">IEC</a>/<a href="/wiki/ITU-T" class="mw-redirect" title="ITU-T">ITU-T</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Compressi%C3%B3_del_grup_4&action=edit&redlink=1" class="new" title="Compressió del grup 4 (encara no existeix)">CCITT Group 4</a></li> <li><a href="/wiki/Transformada_cosinus_discreta" title="Transformada cosinus discreta">DCT</a> <ul><li><a href="/w/index.php?title=High_Efficiency_Image_File_Format&action=edit&redlink=1" class="new" title="High Efficiency Image File Format (encara no existeix)">HEIC</a></li> <li><a href="/w/index.php?title=High_Efficiency_Video_Coding&action=edit&redlink=1" class="new" title="High Efficiency Video Coding (encara no existeix)">HEVC</a></li> <li><a href="/wiki/JPEG" title="JPEG">JPEG</a></li> <li><a href="/wiki/JPEG_XL" title="JPEG XL">JPEG XL</a></li> <li><a href="/w/index.php?title=JPEG_XR&action=edit&redlink=1" class="new" title="JPEG XR (encara no existeix)">JPEG XR</a></li> <li><a href="/w/index.php?title=JPEG_XT&action=edit&redlink=1" class="new" title="JPEG XT (encara no existeix)">JPEG XT</a></li> <li><a href="/w/index.php?title=TIFF/EP&action=edit&redlink=1" class="new" title="TIFF/EP (encara no existeix)">TIFF/EP</a></li></ul></li> <li><a href="/w/index.php?title=Codificaci%C3%B3_aritm%C3%A8tica&action=edit&redlink=1" class="new" title="Codificació aritmètica (encara no existeix)">Aritmètica</a> <ul><li><a href="/w/index.php?title=JBIG&action=edit&redlink=1" class="new" title="JBIG (encara no existeix)">JBIG</a></li> <li><a href="/w/index.php?title=JBIG2&action=edit&redlink=1" class="new" title="JBIG2 (encara no existeix)">JBIG2</a></li></ul></li> <li><a href="/w/index.php?title=JPEG-LS&action=edit&redlink=1" class="new" title="JPEG-LS (encara no existeix)">JPEG-LS</a></li> <li><a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a></li> <li><a href="/w/index.php?title=LZ77_and_LZ78&action=edit&redlink=1" class="new" title="LZ77 and LZ78 (encara no existeix)">LZ</a> <ul><li><a href="/wiki/GIF" title="GIF">GIF</a></li> <li><a href="/wiki/Portable_Network_Graphics" class="mw-redirect" title="Portable Network Graphics">PNG</a></li></ul></li> <li><a href="/wiki/TIFF" class="mw-redirect" title="TIFF">TIFF</a></li> <li><a href="/w/index.php?title=TIFF/IT&action=edit&redlink=1" class="new" title="TIFF/IT (encara no existeix)">TIFF/IT</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;">Altres</div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/APNG" title="APNG">APNG</a></li> <li><a href="/wiki/AVIF" title="AVIF">AVIF</a></li> <li><a href="/w/index.php?title=Better_Portable_Graphics&action=edit&redlink=1" class="new" title="Better Portable Graphics (encara no existeix)">BPG</a></li> <li><a href="/wiki/DjVu" title="DjVu">DjVu</a></li> <li><a href="/wiki/OpenEXR" title="OpenEXR">EXR</a></li> <li><a href="/w/index.php?title=Free_Lossless_Image_Format&action=edit&redlink=1" class="new" title="Free Lossless Image Format (encara no existeix)">FLIF</a></li> <li><a href="/w/index.php?title=ICER&action=edit&redlink=1" class="new" title="ICER (encara no existeix)">ICER</a></li> <li><a href="/w/index.php?title=Multiple-image_Network_Graphics&action=edit&redlink=1" class="new" title="Multiple-image Network Graphics (encara no existeix)">MNG</a></li> <li><a href="/w/index.php?title=Progressive_Graphics_File&action=edit&redlink=1" class="new" title="Progressive Graphics File (encara no existeix)">PGF</a></li> <li><a href="/wiki/QuickTime_VR" title="QuickTime VR">QTVR</a></li> <li><a href="/w/index.php?title=Wireless_Application_Protocol_Bitmap_Format&action=edit&redlink=1" class="new" title="Wireless Application Protocol Bitmap Format (encara no existeix)">WBMP</a></li> <li><a href="/wiki/WebP" title="WebP">WebP</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Contenidor_multim%C3%A8dia" title="Contenidor multimèdia">Contenidors multimèdia</a></th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;">General</div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=MPEG_elementary_stream&action=edit&redlink=1" class="new" title="MPEG elementary stream (encara no existeix)">MPEG-ES</a> <ul><li><a href="/w/index.php?title=Packetized_elementary_stream&action=edit&redlink=1" class="new" title="Packetized elementary stream (encara no existeix)">MPEG-PES</a></li></ul></li> <li><a href="/w/index.php?title=MPEG_program_stream&action=edit&redlink=1" class="new" title="MPEG program stream (encara no existeix)">MPEG-PS</a></li> <li><a href="/wiki/MPEG_transport_stream" class="mw-redirect" title="MPEG transport stream">MPEG-TS</a></li> <li><a href="/w/index.php?title=ISO/IEC_base_media_file_format&action=edit&redlink=1" class="new" title="ISO/IEC base media file format (encara no existeix)">ISO/IEC base media file format</a></li> <li><a href="/wiki/MPEG-4_Part_14" title="MPEG-4 Part 14">MPEG-4 Part 14</a> (MP4)</li> <li><a href="/w/index.php?title=Motion_JPEG_2000&action=edit&redlink=1" class="new" title="Motion JPEG 2000 (encara no existeix)">Motion JPEG 2000</a></li> <li><a href="/wiki/MPEG-21" title="MPEG-21">MPEG-21 Part 9</a></li> <li><a href="/w/index.php?title=MPEG_media_transport&action=edit&redlink=1" class="new" title="MPEG media transport (encara no existeix)">MPEG media transport</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/ITU-T" class="mw-redirect" title="ITU-T">ITU-T</a></div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/MPEG-2#Systems" title="MPEG-2">H.222.0</a></li> <li><a href="/w/index.php?title=Motion_JPEG_2000&action=edit&redlink=1" class="new" title="Motion JPEG 2000 (encara no existeix)">T.802</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a></div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Real-time_Transport_Protocol&action=edit&redlink=1" class="new" title="Real-time Transport Protocol (encara no existeix)">RTP</a></li> <li><a href="/wiki/Ogg" title="Ogg">Ogg</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;"><a href="/wiki/Society_of_Motion_Picture_and_Television_Engineers" class="mw-redirect" title="Society of Motion Picture and Television Engineers">SMPTE</a></div></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=General_Exchange_Format&action=edit&redlink=1" class="new" title="General Exchange Format (encara no existeix)">GXF</a></li> <li><a href="/w/index.php?title=Material_Exchange_Format&action=edit&redlink=1" class="new" title="Material Exchange Format (encara no existeix)">MXF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;padding-left:0em;padding-right:0em;width:9em;"><div style="padding:0em 0.75em;">Altres</div></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;width:auto;"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=3GP_and_3G2&action=edit&redlink=1" class="new" title="3GP and 3G2 (encara no existeix)">3GP and 3G2</a></li> <li><a href="/w/index.php?title=AMV_video_format&action=edit&redlink=1" class="new" title="AMV video format (encara no existeix)">AMV</a></li> <li><a href="/wiki/Advanced_Systems_Format" title="Advanced Systems Format">ASF</a></li> <li><a href="/wiki/Audio_Interchange_File_Format" title="Audio Interchange File Format">AIFF</a></li> <li><a href="/wiki/Audio_Video_Interleave" title="Audio Video Interleave">AVI</a></li> <li><a href="/wiki/Au_file_format" class="mw-redirect" title="Au file format">AU</a></li> <li><a href="/w/index.php?title=Better_Portable_Graphics&action=edit&redlink=1" class="new" title="Better Portable Graphics (encara no existeix)">BPG</a></li> <li><a href="/w/index.php?title=Bink_Video&action=edit&redlink=1" class="new" title="Bink Video (encara no existeix)">Bink</a> <ul><li><a href="/w/index.php?title=Smacker_video&action=edit&redlink=1" class="new" title="Smacker video (encara no existeix)">Smacker</a></li></ul></li> <li><a href="/wiki/BMP_file_format" class="mw-redirect" title="BMP file format">BMP</a></li> <li><a href="/wiki/DivX#DivX_Media_Format_(DMF)" title="DivX">DivX Media Format</a></li> <li><a href="/w/index.php?title=Enhanced_VOB&action=edit&redlink=1" class="new" title="Enhanced VOB (encara no existeix)">EVO</a></li> <li><a href="/w/index.php?title=Flash_Video&action=edit&redlink=1" class="new" title="Flash Video (encara no existeix)">Flash Video</a></li> <li><a href="/w/index.php?title=Interchange_File_Format&action=edit&redlink=1" class="new" title="Interchange File Format (encara no existeix)">IFF</a></li> <li><a href="/wiki/.m2ts" title=".m2ts">M2TS</a></li> <li><a href="/wiki/Matroska" title="Matroska">Matroska</a> <ul><li><a href="/wiki/WebM" title="WebM">WebM</a></li></ul></li> <li><a href="/w/index.php?title=QuickTime_File_Format&action=edit&redlink=1" class="new" title="QuickTime File Format (encara no existeix)">QuickTime File Format</a></li> <li><a href="/wiki/RatDVD" title="RatDVD">RatDVD</a></li> <li><a href="/w/index.php?title=RealMedia&action=edit&redlink=1" class="new" title="RealMedia (encara no existeix)">RealMedia</a></li> <li><a href="/w/index.php?title=Resource_Interchange_File_Format&action=edit&redlink=1" class="new" title="Resource Interchange File Format (encara no existeix)">RIFF</a> <ul><li><a href="/wiki/WAV" title="WAV">WAV</a></li></ul></li> <li><a href="/w/index.php?title=MOD_and_TOD&action=edit&redlink=1" class="new" title="MOD and TOD (encara no existeix)">MOD and TOD</a></li> <li><a href="/wiki/VOB" title="VOB">VOB, IFO and BUP</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Col·laboracions</th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=NETVC&action=edit&redlink=1" class="new" title="NETVC (encara no existeix)">NETVC</a></li> <li><a href="/w/index.php?title=MPEG_LA&action=edit&redlink=1" class="new" title="MPEG LA (encara no existeix)">MPEG LA</a></li> <li><a href="/w/index.php?title=HEVC_Advance&action=edit&redlink=1" class="new" title="HEVC Advance (encara no existeix)">HEVC Advance</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Compressi%C3%B3_de_dades" title="Compressió de dades">Mèdodes</a></th><td class="navbox-list navbox-even hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/Transformada_cosinus_discreta" title="Transformada cosinus discreta">Transformada cosinus discreta</a> <ul><li><a href="/wiki/Transformada_cosinus_discreta" title="Transformada cosinus discreta">DCT</a></li> <li><a href="/wiki/Transformada_directa_del_cosinus_modificat" title="Transformada directa del cosinus modificat">MDCT</a></li></ul></li> <li><a href="/wiki/Codificaci%C3%B3_entr%C3%B2pica" title="Codificació entròpica">Entropia</a> <ul><li><a href="/w/index.php?title=Codificaci%C3%B3_aritm%C3%A8tica&action=edit&redlink=1" class="new" title="Codificació aritmètica (encara no existeix)">Aritmètica</a></li> <li><a href="/wiki/Codificaci%C3%B3_de_Huffman" title="Codificació de Huffman">Huffman</a></li> <li><a href="/w/index.php?title=Codificaci%C3%B3_de_Huffman_modificada&action=edit&redlink=1" class="new" title="Codificació de Huffman modificada (encara no existeix)">Modificada</a></li></ul></li> <li><a href="/wiki/Transformada_r%C3%A0pida_de_Fourier" title="Transformada ràpida de Fourier">FFT</a></li> <li><a href="/wiki/Codificaci%C3%B3_predictiva_lineal" class="mw-redirect" title="Codificació predictiva lineal">LPC</a> <ul><li><a href="/w/index.php?title=Predicci%C3%B3_lineal_excitat_de_codi_alg%C3%A8bric&action=edit&redlink=1" class="new" title="Predicció lineal excitat de codi algèbric (encara no existeix)">ACELP</a></li> <li><a href="/w/index.php?title=Predicci%C3%B3_lineal_excitat_per_codi&action=edit&redlink=1" class="new" title="Predicció lineal excitat per codi (encara no existeix)">CELP</a></li> <li><a href="/w/index.php?title=L%C3%ADnia_de_parells_espectrals&action=edit&redlink=1" class="new" title="Línia de parells espectrals (encara no existeix)">LSP</a></li> <li><a href="/w/index.php?title=Codificaci%C3%B3_predictiva_lineal_deformada&action=edit&redlink=1" class="new" title="Codificació predictiva lineal deformada (encara no existeix)">WLPC</a></li></ul></li> <li><a href="/wiki/Algorisme_de_compressi%C3%B3_sense_p%C3%A8rdua" class="mw-redirect" title="Algorisme de compressió sense pèrdua">Lossless</a></li> <li><a href="/wiki/Algorisme_de_compressi%C3%B3_amb_p%C3%A8rdua" title="Algorisme de compressió amb pèrdua">Lossy</a></li> <li><a href="/w/index.php?title=LZ77_i_LZ78&action=edit&redlink=1" class="new" title="LZ77 i LZ78 (encara no existeix)">LZ</a> <ul><li><a href="/wiki/Algorisme_de_deflaci%C3%B3" title="Algorisme de deflació">Algorisme de deflació</a></li> <li><a href="/wiki/LZW" title="LZW">LZW</a></li></ul></li> <li><a href="/wiki/Modulaci%C3%B3_per_impulsos_codificats" title="Modulació per impulsos codificats">PCM</a> <ul><li><a href="/w/index.php?title=Llei_A&action=edit&redlink=1" class="new" title="Llei A (encara no existeix)">Llei A</a></li> <li><a href="/wiki/Llei_Mu" title="Llei Mu">Llei Mu</a></li> <li><a href="/wiki/ADPCM" title="ADPCM">ADPCM</a></li> <li><a href="/wiki/DPCM" title="DPCM">DPCM</a></li></ul></li> <li><a href="/wiki/Codificaci%C3%B3_per_transformaci%C3%B3" class="mw-redirect" title="Codificació per transformació">Transform</a></li> <li><a href="/wiki/Wavelet" class="mw-redirect" title="Wavelet">Wavelet</a> <ul><li><a href="/w/index.php?title=Daubechies_wavelet&action=edit&redlink=1" class="new" title="Daubechies wavelet (encara no existeix)">Daubechies</a></li> <li><a href="/wiki/Transformada_discreta_d%27ondeta" title="Transformada discreta d'ondeta">DWT</a></li> <li><a href="/w/index.php?title=Transformaci%C3%B3_d%27ona&action=edit&redlink=1" class="new" title="Transformació d'ona (encara no existeix)">Transformació</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Llistes</th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/w/index.php?title=Comparaci%C3%B3_de_formats_de_codificaci%C3%B3_d%27%C3%A0udio&action=edit&redlink=1" class="new" title="Comparació de formats de codificació d'àudio (encara no existeix)">Comparació de formats de codificació d'àudio</a></li> <li><a href="/w/index.php?title=Comparaci%C3%B3_de_c%C3%B2decs_de_v%C3%ADdeo&action=edit&redlink=1" class="new" title="Comparació de còdecs de vídeo (encara no existeix)">Comparació de còdecs de vídeo</a></li> <li><a href="/wiki/Llista_de_c%C3%B2decs" title="Llista de còdecs">Llista de còdecs</a></li></ul> </div></td></tr></tbody></table></div> <div role="navigation" class="navbox" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Control_d%27autoritats" title="Control d'autoritats">Registres d'autoritat</a></th><td class="navbox-list navbox-odd" 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