CINXE.COM

MPEG-1 Layer II - Wikipedia

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available" lang="it" dir="ltr"> <head> <meta charset="UTF-8"> <title>MPEG-1 Layer II - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available";var cookie=document.cookie.match(/(?:^|; )itwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":[",\t."," \t,"],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","gennaio","febbraio","marzo","aprile","maggio","giugno","luglio","agosto","settembre","ottobre","novembre","dicembre"],"wgRequestId":"18ff7ade-9f7e-4f3e-afdc-99f098b84d94","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"MPEG-1_Layer_II","wgTitle":"MPEG-1 Layer II","wgCurRevisionId":139182277,"wgRevisionId":139182277,"wgArticleId":1594762,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["Senza fonti - informatica","Senza fonti - luglio 2014","Collegamento interprogetto a Wikisource presente ma assente su Wikidata","Codec audio","MPEG"],"wgPageViewLanguage":"it","wgPageContentLanguage":"it","wgPageContentModel":"wikitext","wgRelevantPageName":"MPEG-1_Layer_II","wgRelevantArticleId":1594762,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject":"wikipedia", "wgCiteReferencePreviewsActive":false,"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"it","pageLanguageDir":"ltr","pageVariantFallbacks":"it"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":true,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":3000,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q592654","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready", "ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["site","mediawiki.page.ready","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.MainPageWikiList","ext.gadget.stru-commonsupload","ext.gadget.HiddenCat","ext.gadget.ReferenceTooltips","ext.gadget.TitoloErrato","ext.gadget.NewSection","ext.gadget.RichiediRevisioneBozza","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents", "ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=it&amp;modules=ext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&amp;only=styles&amp;skin=vector-2022"> <script async="" src="/w/load.php?lang=it&amp;modules=startup&amp;only=scripts&amp;raw=1&amp;skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=it&amp;modules=site.styles&amp;only=styles&amp;skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.17"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="MPEG-1 Layer II - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//it.m.wikipedia.org/wiki/MPEG-1_Layer_II"> <link rel="alternate" type="application/x-wiki" title="Modifica" href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (it)"> <link rel="EditURI" type="application/rsd+xml" href="//it.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://it.wikipedia.org/wiki/MPEG-1_Layer_II"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.it"> <link rel="alternate" type="application/atom+xml" title="Feed Atom di Wikipedia" href="/w/index.php?title=Speciale:UltimeModifiche&amp;feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-MPEG-1_Layer_II rootpage-MPEG-1_Layer_II skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Vai al contenuto</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Sito"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" title="Menu principale" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Menu principale" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-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-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Menu principale</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Menu principale</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">nascondi</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigazione </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Pagina_principale" title="Visita la pagina principale [z]" accesskey="z"><span>Pagina principale</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Speciale:UltimeModifiche" title="Elenco delle ultime modifiche del sito [r]" accesskey="r"><span>Ultime modifiche</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Speciale:PaginaCasuale" title="Mostra una pagina a caso [x]" accesskey="x"><span>Una voce a caso</span></a></li><li id="n-nearby-pages-title" class="mw-list-item"><a href="/wiki/Speciale:NelleVicinanze"><span>Nelle vicinanze</span></a></li><li id="n-vetrina" class="mw-list-item"><a href="/wiki/Wikipedia:Vetrina"><span>Vetrina</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Aiuto:Aiuto" title="Pagine di aiuto"><span>Aiuto</span></a></li><li id="n-Sportello-informazioni" class="mw-list-item"><a href="/wiki/Aiuto:Sportello_informazioni"><span>Sportello informazioni</span></a></li><li id="n-specialpages" class="mw-list-item"><a href="/wiki/Speciale:PagineSpeciali"><span>Pagine speciali</span></a></li> </ul> </div> </div> <div id="p-Comunità" class="vector-menu mw-portlet mw-portlet-Comunità" > <div class="vector-menu-heading"> Comunità </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-portal" class="mw-list-item"><a href="/wiki/Portale:Comunit%C3%A0" title="Descrizione del progetto, cosa puoi fare, dove trovare le cose"><span>Portale Comunità</span></a></li><li id="n-villagepump" class="mw-list-item"><a href="/wiki/Wikipedia:Bar"><span>Bar</span></a></li><li id="n-wikipediano" class="mw-list-item"><a href="/wiki/Wikipedia:Wikipediano"><span>Il Wikipediano</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="/wiki/Wikipedia:Contatti"><span>Contatti</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Pagina_principale" 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="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="L&#039;enciclopedia libera" src="/static/images/mobile/copyright/wikipedia-tagline-it.svg" width="120" height="13" style="width: 7.5em; height: 0.8125em;"> </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/Speciale:Ricerca" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Cerca in Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Ricerca</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 in Wikipedia" aria-label="Cerca in Wikipedia" autocapitalize="sentences" title="Cerca in Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Speciale:Ricerca"> </div> <button class="cdx-button cdx-search-input__end-button">Ricerca</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Strumenti personali"> <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="Aspetto"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Modifica la dimensione, la larghezza e il colore del testo" > <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="Aspetto" > <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">Aspetto</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&amp;wmf_medium=sidebar&amp;wmf_campaign=it.wikipedia.org&amp;uselang=it" class=""><span>Fai una donazione</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=Speciale:CreaUtenza&amp;returnto=MPEG-1+Layer+II" title="Si consiglia di registrarsi e di effettuare l&#039;accesso, anche se non è obbligatorio" class=""><span>registrati</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=Speciale:Entra&amp;returnto=MPEG-1+Layer+II" title="Si consiglia di effettuare l&#039;accesso, anche se non è obbligatorio [o]" accesskey="o" class=""><span>entra</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="Altre opzioni" > <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="Strumenti personali" > <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">Strumenti personali</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Menu utente" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&amp;wmf_medium=sidebar&amp;wmf_campaign=it.wikipedia.org&amp;uselang=it"><span>Fai una donazione</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speciale:CreaUtenza&amp;returnto=MPEG-1+Layer+II" title="Si consiglia di registrarsi e di effettuare l&#039;accesso, anche se non è obbligatorio"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>registrati</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speciale:Entra&amp;returnto=MPEG-1+Layer+II" title="Si consiglia di effettuare l&#039;accesso, anche se non è obbligatorio [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>entra</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pagine per utenti anonimi <a href="/wiki/Aiuto:Benvenuto" aria-label="Ulteriori informazioni sulla contribuzione"><span>ulteriori informazioni</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/Speciale:MieiContributi" title="Un elenco delle modifiche fatte da questo indirizzo IP [y]" accesskey="y"><span>contributi</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speciale:MieDiscussioni" title="Discussioni sulle modifiche fatte da questo indirizzo IP [n]" accesskey="n"><span>discussioni</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"><!-- CentralNotice --></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="Sito"> <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="Indice" 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">Indice</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</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">Inizio</div> </a> </li> <li id="toc-Ambiti_di_utilizzo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ambiti_di_utilizzo"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Ambiti di utilizzo</span> </div> </a> <ul id="toc-Ambiti_di_utilizzo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Caratteristiche_principali" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Caratteristiche_principali"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Caratteristiche principali</span> </div> </a> <ul id="toc-Caratteristiche_principali-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Estensioni_dello_standard" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Estensioni_dello_standard"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Estensioni dello standard</span> </div> </a> <button aria-controls="toc-Estensioni_dello_standard-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>Attiva/disattiva la sottosezione Estensioni dello standard</span> </button> <ul id="toc-Estensioni_dello_standard-sublist" class="vector-toc-list"> <li id="toc-Estensioni_retrocompatibili" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Estensioni_retrocompatibili"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Estensioni retrocompatibili</span> </div> </a> <ul id="toc-Estensioni_retrocompatibili-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Estensioni_non_retrocompatibili" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Estensioni_non_retrocompatibili"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Estensioni non retrocompatibili</span> </div> </a> <ul id="toc-Estensioni_non_retrocompatibili-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-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="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indice" > <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="Mostra/Nascondi l&#039;indice" > <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">Mostra/Nascondi l&#039;indice</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">MPEG-1 Layer II</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="Vai a una voce in un&#039;altra lingua. Disponibile in 15 lingue" > <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-15" 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">15 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/MP2" title="MP2 - asturiano" lang="ast" hreflang="ast" data-title="MP2" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/MP2" title="MP2 - ceco" lang="cs" hreflang="cs" data-title="MP2" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/MPEG-1_Audio_Layer_2" title="MPEG-1 Audio Layer 2 - tedesco" lang="de" hreflang="de" data-title="MPEG-1 Audio Layer 2" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II - inglese" lang="en" hreflang="en" data-title="MPEG-1 Audio Layer II" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/MP2" title="MP2 - spagnolo" lang="es" hreflang="es" data-title="MP2" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Mp2" title="Mp2 - croato" lang="hr" hreflang="hr" data-title="Mp2" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/MPEG-1_%EC%98%A4%EB%94%94%EC%98%A4_%EB%A0%88%EC%9D%B4%EC%96%B4_II" title="MPEG-1 오디오 레이어 II - coreano" lang="ko" hreflang="ko" data-title="MPEG-1 오디오 레이어 II" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/MP2" title="MP2 - polacco" lang="pl" hreflang="pl" data-title="MP2" data-language-autonym="Polski" data-language-local-name="polacco" 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/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II - portoghese" lang="pt" hreflang="pt" data-title="MPEG-1 Audio Layer II" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II - russo" lang="ru" hreflang="ru" data-title="MPEG-1 Audio Layer II" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/MP2" title="MP2 - slovacco" lang="sk" hreflang="sk" data-title="MP2" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/MP2" title="MP2 - turco" lang="tr" hreflang="tr" data-title="MP2" data-language-autonym="Türkçe" data-language-local-name="turco" 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/MP2" title="MP2 - ucraino" lang="uk" hreflang="uk" data-title="MP2" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II - yoruba" lang="yo" hreflang="yo" data-title="MPEG-1 Audio Layer II" data-language-autonym="Yorùbá" data-language-local-name="yoruba" 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/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II - cinese" lang="zh" hreflang="zh" data-title="MPEG-1 Audio Layer II" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</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/Q592654#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</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="Namespace"> <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/MPEG-1_Layer_II" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussione:MPEG-1_Layer_II&amp;action=edit&amp;redlink=1" rel="discussion" class="new" title="Vedi le discussioni relative a questa pagina (la pagina non esiste) [t]" accesskey="t"><span>Discussione</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="Cambia versione linguistica" > <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">italiano</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="Visite"> <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/MPEG-1_Layer_II"><span>Leggi</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit" title="Modifica questa pagina [v]" accesskey="v"><span>Modifica</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit" title="Modifica il wikitesto di questa pagina [e]" accesskey="e"><span>Modifica wikitesto</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=history" title="Versioni precedenti di questa pagina [h]" accesskey="h"><span>Cronologia</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <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="Strumenti" > <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">Strumenti</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">Strumenti</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">nascondi</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Altre opzioni" > <div class="vector-menu-heading"> Azioni </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/MPEG-1_Layer_II"><span>Leggi</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit" title="Modifica questa pagina [v]" accesskey="v"><span>Modifica</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit" title="Modifica il wikitesto di questa pagina [e]" accesskey="e"><span>Modifica wikitesto</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=history"><span>Cronologia</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Generale </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciale:PuntanoQui/MPEG-1_Layer_II" title="Elenco di tutte le pagine che sono collegate a questa [j]" accesskey="j"><span>Puntano qui</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciale:ModificheCorrelate/MPEG-1_Layer_II" rel="nofollow" title="Elenco delle ultime modifiche alle pagine collegate a questa [k]" accesskey="k"><span>Modifiche correlate</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;oldid=139182277" title="Collegamento permanente a questa versione di questa pagina"><span>Link permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=info" title="Ulteriori informazioni su questa pagina"><span>Informazioni pagina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Speciale:Cita&amp;page=MPEG-1_Layer_II&amp;id=139182277&amp;wpFormIdentifier=titleform" title="Informazioni su come citare questa pagina"><span>Cita questa voce</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Speciale:UrlShortener&amp;url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FMPEG-1_Layer_II"><span>Ottieni URL breve</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speciale:QrCode&amp;url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FMPEG-1_Layer_II"><span>Scarica codice 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"> Stampa/esporta </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=Speciale:Libro&amp;bookcmd=book_creator&amp;referer=MPEG-1+Layer+II"><span>Crea un libro</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speciale:DownloadAsPdf&amp;page=MPEG-1_Layer_II&amp;action=show-download-screen"><span>Scarica come PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=MPEG-1_Layer_II&amp;printable=yes" title="Versione stampabile di questa pagina [p]" accesskey="p"><span>Versione stampabile</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"> In altri progetti </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q592654" title="Collegamento all&#039;elemento connesso dell&#039;archivio dati [g]" accesskey="g"><span>Elemento 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="Strumenti pagine"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <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">Aspetto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">nascondi</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">Da Wikipedia, l&#039;enciclopedia libera.</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="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r133964453">.mw-parser-output .avviso .mbox-text-div>div,.mw-parser-output .avviso .mbox-text-full-div>div{font-size:90%}.mw-parser-output .avviso .mbox-image{flex-basis:52px;flex-grow:0;flex-shrink:0}.mw-parser-output .avviso .mbox-text-full-div .hide-when-compact{display:block}</style><div style="" class="ambox metadata plainlinks avviso avviso-contenuto"> <div class="avviso-immagine mbox-image noprint"><span typeof="mw:File"><a href="/wiki/File:Question_book-4.svg" class="mw-file-description" title="Niente fonti!"><img alt="Niente fonti!" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/45px-Question_book-4.svg.png" decoding="async" width="45" height="35" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/68px-Question_book-4.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/90px-Question_book-4.svg.png 2x" data-file-width="262" data-file-height="204" /></a></span></div> <div class="avviso-testo mbox-text"> <div class="mbox-text-div"><b>Questa voce o sezione &#32;sull'argomento informatica <a href="/wiki/Wikipedia:Uso_delle_fonti" title="Wikipedia:Uso delle fonti">non cita le fonti necessarie</a> o quelle presenti sono insufficienti</b>. <div class="hide-when-compact"> <div class="noprint"><hr />Puoi <a class="external text" href="https://it.wikipedia.org/w/index.php?title=MPEG-1_Layer_II&amp;action=edit">migliorare questa voce</a> aggiungendo citazioni da <a href="/wiki/Wikipedia:Fonti_attendibili" title="Wikipedia:Fonti attendibili">fonti attendibili</a> secondo le <a href="/wiki/Wikipedia:Uso_delle_fonti" title="Wikipedia:Uso delle fonti">linee guida sull'uso delle fonti</a>. Segui i suggerimenti del <a href="/wiki/Progetto:Informatica" title="Progetto:Informatica">progetto di riferimento</a>.</div> </div> </div> </div> </div> <p><b>MPEG-1 Part 3 Layer II</b>, anche chiamato <b>MPEG-1 Audio Layer II</b> o <b>MPEG-1 Audio Layer 2</b>, comunemente abbreviato in <b>MPEG-1 Layer II</b> o <b>MPEG-1 Layer 2</b>, sigla <b>MP2</b>, in origine <b>MUSICAM</b> (acronimo dell'<a href="/wiki/Lingua_inglese" title="Lingua inglese">inglese</a> <i>Masking-pattern Universal Sub-band Integrated Coding And Multiplexing</i>), è uno standard di <a href="/wiki/Audio_digitale" title="Audio digitale">audio digitale</a> del <a href="/wiki/MPEG" title="MPEG">Moving Picture Experts Group</a>, in particolare un <a href="/wiki/Codec_audio" title="Codec audio">codec audio</a> <a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">con perdita</a>. </p><p>L'MPEG-1 Layer II è un'estensione dell'<a href="/wiki/MPEG-1_Layer_I" title="MPEG-1 Layer I">MPEG-1 Layer I</a> quindi un decoder MPEG-1 Layer II oltre che decodificare l'MPEG-1 Layer II è in grado di decodificare anche l'MPEG-1 Layer I. Non è però un'estensione retrocompatibile quindi un decoder MPEG-1 Layer I non è in grado di decodificare l'MPEG-1 Layer II. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Ambiti_di_utilizzo">Ambiti di utilizzo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=1" title="Modifica la sezione Ambiti di utilizzo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Ambiti di utilizzo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'MPEG-1 Layer II è utilizzato in vari ambiti. Di seguito sono riportati gli ambiti di utilizzo e gli standard che ne fanno uso: </p> <ul><li><a href="/wiki/Televisione_digitale" title="Televisione digitale">televisione digitale</a>: <a href="/wiki/DVB-T" title="DVB-T">DVB-T</a>, <a href="/wiki/DVB-C" title="DVB-C">DVB-C</a>, <a href="/wiki/DVB-S" title="DVB-S">DVB-S</a> e <a href="/wiki/DVB-S2" title="DVB-S2">DVB-S2</a>;</li> <li><a href="/wiki/Radio_(mass_media)" title="Radio (mass media)">radio</a> digitale: <a href="/wiki/Digital_Audio_Broadcasting" title="Digital Audio Broadcasting">DAB</a>;</li> <li><a href="/wiki/Supporto_di_memorizzazione" class="mw-redirect" title="Supporto di memorizzazione">supporti</a> di <a href="/wiki/Videoregistrazione" title="Videoregistrazione">videoregistrazione</a>: <a href="/wiki/Video_CD" title="Video CD">Video CD</a>, <a href="/wiki/Super_Video_CD" title="Super Video CD">Super Video CD</a>, <a href="/wiki/China_Video_Disc" title="China Video Disc">China Video Disc</a>, <a href="/wiki/DVD-Video" title="DVD-Video">DVD-Video</a> e <a href="/wiki/DualDisc" title="DualDisc">DualDisc</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Caratteristiche_principali">Caratteristiche principali</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=2" title="Modifica la sezione Caratteristiche principali" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: Caratteristiche principali"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Compressione_dati_con_perdita" class="mw-redirect" title="Compressione dati con perdita">Compressione dati con perdita</a>.</li> <li><a href="/wiki/Frequenza_di_campionamento" title="Frequenza di campionamento">Frequenze di campionamento</a> ammesse: 32, 44,1 e 48 <a href="/wiki/KHz" class="mw-redirect" title="KHz">kHz</a>.</li> <li><a href="/wiki/Bitrate" class="mw-redirect" title="Bitrate">Bitrate</a> ammessi: 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 e 384 <a href="/wiki/Kilobit_per_secondo" class="mw-redirect" title="Kilobit per secondo">kb/s</a>.</li> <li>Numero massimo di canali audio discreti: 2.</li> <li>Modalità audio supportate: <a href="/wiki/Monofonia_(audio)" title="Monofonia (audio)">monofonia</a>, <a href="/wiki/Stereofonia" title="Stereofonia">stereofonia</a>, <a href="/wiki/Dolby_Surround" title="Dolby Surround">Dolby Surround</a> e <a href="/wiki/Dolby_Pro_Logic_II" class="mw-redirect" title="Dolby Pro Logic II">Dolby Pro Logic II</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Estensioni_dello_standard">Estensioni dello standard</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=3" title="Modifica la sezione Estensioni dello standard" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Estensioni dello standard"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Lo standard MPEG-1 Layer II ha 3 estensioni, 1 retrocompatibile e 2 non retrocompatibili. </p> <div class="mw-heading mw-heading3"><h3 id="Estensioni_retrocompatibili">Estensioni retrocompatibili</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=4" title="Modifica la sezione Estensioni retrocompatibili" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Estensioni retrocompatibili"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Estensione retrocompatibile dell'MPEG-1 Layer II è: </p> <ul><li><a href="/w/index.php?title=MPEG-2_Layer_II&amp;action=edit&amp;redlink=1" class="new" title="MPEG-2 Layer II (la pagina non esiste)">MPEG-2 Layer II</a></li></ul> <p>Un decoder (quindi un qualsiasi lettore, hardware o software che sia) MPEG-2 Layer II è quindi in grado di decodificare l'MPEG-1 Layer II, ma anche un decoder MPEG-1 Layer II è in grado di decodificare l'MPEG-2 Layer II. </p> <div class="mw-heading mw-heading3"><h3 id="Estensioni_non_retrocompatibili">Estensioni non retrocompatibili</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=5" title="Modifica la sezione Estensioni non retrocompatibili" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=5" title="Edit section&#039;s source code: Estensioni non retrocompatibili"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Estensioni non retrocompatibili dell'MPEG-1 Layer II sono: </p> <ul><li><a href="/wiki/MPEG-1_Layer_III" class="mw-redirect" title="MPEG-1 Layer III">MPEG-1 Layer III</a></li> <li><a href="/wiki/MPEG-2_Layer_III" class="mw-redirect" title="MPEG-2 Layer III">MPEG-2 Layer III</a></li></ul> <p>Un decoder (quindi un qualsiasi lettore, hardware o software che sia) MPEG-1 Layer III o MPEG-2 Layer III è quindi in grado di decodificare l'MPEG-1 Layer II, mentre invece un decoder MPEG-1 Layer II non è in grado di decodificare l'MPEG-1 Layer III e l'MPEG-2 Layer III. </p> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=6" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=6" title="Edit section&#039;s source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a></li> <li><a href="/wiki/Audio" title="Audio">Audio</a></li> <li><a href="/wiki/Audio_digitale" title="Audio digitale">Audio digitale</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;veaction=edit&amp;section=7" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MPEG-1_Layer_II&amp;action=edit&amp;section=7" title="Edit section&#039;s source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><a href="https://it.wikisource.org/wiki/Codifica_numerica_del_segnale_audio/Capitolo_7#7_2_6" class="extiw" title="s:Codifica numerica del segnale audio/Capitolo 7">Wikisource</a></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wikisource.org/wiki/" title="Collabora a Wikisource"><img alt="Collabora a Wikisource" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/18px-Wikisource-logo.svg.png" decoding="async" width="18" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/27px-Wikisource-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/36px-Wikisource-logo.svg.png 2x" data-file-width="410" data-file-height="430" /></a></span> <a href="https://it.wikisource.org/wiki/" class="extiw" title="s:">Wikisource</a> contiene una pagina dedicata a <b><a href="https://it.wikisource.org/wiki/Codifica_numerica_del_segnale_audio/Capitolo_7#7_2_6" class="extiw" title="s:Codifica numerica del segnale audio/Capitolo 7">MPEG-1 Layer II</a></b></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Formati_di_compressione"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Formati_di_compressione" title="Template:Formati di compressione"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/wiki/Discussioni_template:Formati_di_compressione" title="Discussioni template:Formati di compressione"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Formati_di_compressione&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title">Standard di <a href="/wiki/Compressione_dei_dati" title="Compressione dei dati">compressione dei dati</a> per il <a href="/wiki/Multimedialit%C3%A0" title="Multimedialità">multimedia</a></span></th></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Compressione_video_digitale" title="Compressione video digitale">Video</a></th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>/<a href="/wiki/Commissione_elettrotecnica_internazionale" title="Commissione elettrotecnica internazionale">IEC</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Motion_JPEG" title="Motion JPEG">Motion JPEG</a><b>&#160;·</b> <a href="/wiki/JPEG_2000#Motion_JPEG_2000" title="JPEG 2000">Motion JPEG 2000</a><b>&#160;·</b> <a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a><b>&#160;·</b> <a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a><b>&#160;·</b> <a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4 ASP</a><b>&#160;·</b> <a href="/wiki/H.264" title="H.264">MPEG-4 AVC</a><b>&#160;·</b> <a href="/wiki/Multiview_Video_Coding" title="Multiview Video Coding">MVC</a><b>&#160;·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">MPEG-H Part 2 / HEVC</a><b>&#160;·</b> <a href="/w/index.php?title=Versatile_Video_Codec&amp;action=edit&amp;redlink=1" class="new" title="Versatile Video Codec (la pagina non esiste)">MPEG-I Part 3 / VVC</a><b>&#160;·</b> <a href="/w/index.php?title=MPEG-5&amp;action=edit&amp;redlink=1" class="new" title="MPEG-5 (la pagina non esiste)">MPEG-5 (Part1/EVC, Part2/LC EVC)</a><b>&#160;·</b></td></tr><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/H.120" title="H.120">H.120</a><b>&#160;·</b> <a href="/wiki/H.261" title="H.261">H.261</a><b>&#160;·</b> <a href="/wiki/H.262" title="H.262">H.262</a><b>&#160;·</b> <a href="/wiki/H.263" title="H.263">H.263</a><b>&#160;·</b> <a href="/wiki/H.264" title="H.264">H.264</a><b>&#160;·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">H.265</a><b>&#160;·</b> <a href="/w/index.php?title=Versatile_Video_Codec&amp;action=edit&amp;redlink=1" class="new" title="Versatile Video Codec (la pagina non esiste)">H.266</a><b>&#160;·</b> <a href="/w/index.php?title=Enhanced_Coding_Model&amp;action=edit&amp;redlink=1" class="new" title="Enhanced Coding Model (la pagina non esiste)">H.267</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">altro</th><td colspan="1" style="width:auto; text-align:left;"><a href="/w/index.php?title=AMV_(formato_video)&amp;action=edit&amp;redlink=1" class="new" title="AMV (formato video) (la pagina non esiste)">AMV</a><b>&#160;·</b> <a href="/wiki/AOMedia_Video_1" title="AOMedia Video 1">AV1</a><b>&#160;·</b> <a href="/wiki/Audio_Video_Standard" title="Audio Video Standard">AVS</a><b>&#160;·</b> <a href="/wiki/Bink_Video" title="Bink Video">Bink</a><b>&#160;·</b> <a href="/w/index.php?title=Daala_(codec_video)&amp;action=edit&amp;redlink=1" class="new" title="Daala (codec video) (la pagina non esiste)">Daala</a><b>&#160;·</b> <a href="/w/index.php?title=Dirac_(codec_video)&amp;action=edit&amp;redlink=1" class="new" title="Dirac (codec video) (la pagina non esiste)">Dirac</a><b>&#160;·</b> <a href="/wiki/DNxHD" title="DNxHD">DNxHD</a><b>&#160;·</b> <a href="/wiki/FFV1" title="FFV1">FFV1</a><b>&#160;·</b> <a href="/wiki/Huffyuv" title="Huffyuv">Huffyuv</a><b>&#160;·</b> <a href="/wiki/Indeo_Video" title="Indeo Video">Indeo</a><b>&#160;·</b> <a href="/wiki/Pixlet" title="Pixlet">Pixlet</a><b>&#160;·</b> <a href="/wiki/ProRes" title="ProRes">ProRes</a><b>&#160;·</b> <a href="/wiki/RealVideo" title="RealVideo">RealVideo</a><b>&#160;·</b> <a href="/w/index.php?title=RTVideo&amp;action=edit&amp;redlink=1" class="new" title="RTVideo (la pagina non esiste)">RTVideo</a><b>&#160;·</b> <a href="/w/index.php?title=SheerVideo&amp;action=edit&amp;redlink=1" class="new" title="SheerVideo (la pagina non esiste)">SheerVideo</a><b>&#160;·</b> <a href="/w/index.php?title=Smacker_video&amp;action=edit&amp;redlink=1" class="new" title="Smacker video (la pagina non esiste)">Smacker</a><b>&#160;·</b> <a href="/w/index.php?title=Snow_(codec)&amp;action=edit&amp;redlink=1" class="new" title="Snow (codec) (la pagina non esiste)">Snow</a><b>&#160;·</b> <a href="/wiki/Codec_Sorenson" title="Codec Sorenson">Sorenson</a><b>&#160;·</b> <a href="/wiki/Theora" title="Theora">Theora</a><b>&#160;·</b> <a href="/wiki/VC-1" title="VC-1">VC-1</a><b>&#160;·</b> <a href="/wiki/VP6" title="VP6">VP6</a><b>&#160;·</b> <a href="/wiki/VP7" title="VP7">VP7</a><b>&#160;·</b> <a href="/wiki/VP8" title="VP8">VP8</a><b>&#160;·</b> <a href="/wiki/VP9" title="VP9">VP9</a><b>&#160;·</b> <a href="/wiki/Windows_Media_Video" title="Windows Media Video">WMV</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Compressione_audio_digitale" title="Compressione audio digitale">Audio</a></th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>/<a href="/wiki/Commissione_elettrotecnica_internazionale" title="Commissione elettrotecnica internazionale">IEC</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a><b>&#160;·</b> <a href="/w/index.php?title=HE-AAC&amp;action=edit&amp;redlink=1" class="new" title="HE-AAC (la pagina non esiste)">HE-AAC</a><b>&#160;·</b> <a href="/w/index.php?title=HE-AAC_v2&amp;action=edit&amp;redlink=1" class="new" title="HE-AAC v2 (la pagina non esiste)">HE-AAC v2</a><b>&#160;·</b> <a href="/wiki/MPEG-1_Layer_I" title="MPEG-1 Layer I">MPEG-1 Layer I</a><b>&#160;·</b> <a class="mw-selflink selflink">MPEG-1 Layer II</a><b>&#160;·</b> <a href="/wiki/MP3" title="MP3">MPEG-1 Layer III (MP3)</a><b>&#160;·</b> <a href="/w/index.php?title=MPEG-2_Layer_I&amp;action=edit&amp;redlink=1" class="new" title="MPEG-2 Layer I (la pagina non esiste)">MPEG-2 Layer I</a><b>&#160;·</b> <a href="/w/index.php?title=MPEG-2_Layer_II&amp;action=edit&amp;redlink=1" class="new" title="MPEG-2 Layer II (la pagina non esiste)">MPEG-2 Layer II</a><b>&#160;·</b> <a href="/wiki/MP3" title="MP3">MPEG-2 Layer III (MP3)</a></td></tr><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/G.711" title="G.711">G.711</a><b>&#160;·</b> <a href="/wiki/G.722" title="G.722">G.722</a><b>&#160;·</b> <a href="/w/index.php?title=G.722.1&amp;action=edit&amp;redlink=1" class="new" title="G.722.1 (la pagina non esiste)">G.722.1</a><b>&#160;·</b> <a href="/w/index.php?title=G.722.2&amp;action=edit&amp;redlink=1" class="new" title="G.722.2 (la pagina non esiste)">G.722.2</a><b>&#160;·</b> <a href="/wiki/G.723" title="G.723">G.723</a><b>&#160;·</b> <a href="/w/index.php?title=G.723.1&amp;action=edit&amp;redlink=1" class="new" title="G.723.1 (la pagina non esiste)">G.723.1</a><b>&#160;·</b> <a href="/w/index.php?title=G.726&amp;action=edit&amp;redlink=1" class="new" title="G.726 (la pagina non esiste)">G.726</a><b>&#160;·</b> <a href="/w/index.php?title=G.728&amp;action=edit&amp;redlink=1" class="new" title="G.728 (la pagina non esiste)">G.728</a><b>&#160;·</b> <a href="/wiki/G.729" title="G.729">G.729</a><b>&#160;·</b> <a href="/w/index.php?title=G.729.1&amp;action=edit&amp;redlink=1" class="new" title="G.729.1 (la pagina non esiste)">G.729.1</a><b>&#160;·</b> <a href="/w/index.php?title=G.729a&amp;action=edit&amp;redlink=1" class="new" title="G.729a (la pagina non esiste)">G.729a</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">altro</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Dolby_Digital" title="Dolby Digital">AC3</a><b>&#160;·</b> <a href="/wiki/Adaptive_Multi-Rate" title="Adaptive Multi-Rate">AMR</a><b>&#160;·</b> <a href="/wiki/Apple_Lossless_Encoding" title="Apple Lossless Encoding">Apple Lossless</a><b>&#160;·</b> <a href="/wiki/AptX" title="AptX">aptX</a><b>&#160;·</b> <a href="/wiki/ATRAC" title="ATRAC">ATRAC</a><b>&#160;·</b> <a href="/w/index.php?title=Constrained_Energy_Lapped_Transform&amp;action=edit&amp;redlink=1" class="new" title="Constrained Energy Lapped Transform (la pagina non esiste)">CELT</a><b>&#160;·</b> <a href="/wiki/Free_Lossless_Audio_Codec" title="Free Lossless Audio Codec">FLAC</a><b>&#160;·</b> <a href="/wiki/Internet_Low_Bit_Rate_Codec" title="Internet Low Bit Rate Codec">iLBC</a><b>&#160;·</b> <a href="/wiki/Monkey%27s_Audio" title="Monkey&#39;s Audio">Monkey's Audio</a><b>&#160;·</b> <a href="/w/index.php?title=%CE%9C-law_algorithm&amp;action=edit&amp;redlink=1" class="new" title="Μ-law algorithm (la pagina non esiste)">μ-law</a><b>&#160;·</b> <a href="/wiki/Musepack" title="Musepack">Musepack</a><b>&#160;·</b> <a href="/w/index.php?title=Nellymoser_Asao_Codec_in_Flash&amp;action=edit&amp;redlink=1" class="new" title="Nellymoser Asao Codec in Flash (la pagina non esiste)">Nellymoser</a><b>&#160;·</b> <a href="/w/index.php?title=OptimFROG&amp;action=edit&amp;redlink=1" class="new" title="OptimFROG (la pagina non esiste)">OptimFROG</a><b>&#160;·</b> <a href="/wiki/Opus_(codec_audio)" title="Opus (codec audio)">Opus</a><b>&#160;·</b> <a href="/wiki/RealAudio" title="RealAudio">RealAudio</a><b>&#160;·</b> <a href="/w/index.php?title=RTAudio&amp;action=edit&amp;redlink=1" class="new" title="RTAudio (la pagina non esiste)">RTAudio</a><b>&#160;·</b> <a href="/w/index.php?title=Shorten&amp;action=edit&amp;redlink=1" class="new" title="Shorten (la pagina non esiste)">SHN</a><b>&#160;·</b> <a href="/wiki/SILK" title="SILK">SILK</a><b>&#160;·</b> <a href="/w/index.php?title=Siren_Codec&amp;action=edit&amp;redlink=1" class="new" title="Siren Codec (la pagina non esiste)">Siren</a><b>&#160;·</b> <a href="/wiki/Speex" title="Speex">Speex</a><b>&#160;·</b> <a href="/w/index.php?title=TAK_(audio_codec)&amp;action=edit&amp;redlink=1" class="new" title="TAK (audio codec) (la pagina non esiste)">TAK</a><b>&#160;·</b> <a href="/wiki/Vorbis" title="Vorbis">Vorbis</a><b>&#160;·</b> <a href="/w/index.php?title=WavPack&amp;action=edit&amp;redlink=1" class="new" title="WavPack (la pagina non esiste)">WavPack</a><b>&#160;·</b> <a href="/wiki/Windows_Media_Audio" title="Windows Media Audio">WMA</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Compressione_dell%27immagine" title="Compressione dell&#39;immagine">Immagine</a></th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>/<a href="/wiki/Commissione_elettrotecnica_internazionale" title="Commissione elettrotecnica internazionale">IEC</a>/<a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/High_Efficiency_Image_File_Format" title="High Efficiency Image File Format">HEIF</a><b>&#160;·</b> <a href="/wiki/JPEG" title="JPEG">JPEG</a><b>&#160;·</b> <a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a><b>&#160;·</b> <a href="/wiki/JPEG_XL" title="JPEG XL">JPEG XL</a><b>&#160;·</b> <a href="/w/index.php?title=JBIG&amp;action=edit&amp;redlink=1" class="new" title="JBIG (la pagina non esiste)">JBIG</a><b>&#160;·</b> <a href="/w/index.php?title=JBIG2&amp;action=edit&amp;redlink=1" class="new" title="JBIG2 (la pagina non esiste)">JBIG2</a><b>&#160;·</b> <a href="/w/index.php?title=Lossless_JPEG&amp;action=edit&amp;redlink=1" class="new" title="Lossless JPEG (la pagina non esiste)">lossless JPEG</a><b>&#160;·</b> <a href="/wiki/Portable_Network_Graphics" title="Portable Network Graphics">PNG</a><b>&#160;·</b> <a href="/w/index.php?title=Multiple_image_Network_Graphics&amp;action=edit&amp;redlink=1" class="new" title="Multiple image Network Graphics (la pagina non esiste)">MNG</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">altro</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Windows_bitmap" title="Windows bitmap">BMP</a><b>&#160;·</b> <a href="/wiki/FXG" title="FXG">FXG</a><b>&#160;·</b> <a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">GIF</a><b>&#160;·</b> <a href="/wiki/ICER" title="ICER">ICER</a><b>&#160;·</b> <a href="/w/index.php?title=ILBM&amp;action=edit&amp;redlink=1" class="new" title="ILBM (la pagina non esiste)">ILBM</a><b>&#160;·</b> <a href="/wiki/Truevision_TGA" title="Truevision TGA">TGA</a><b>&#160;·</b> <a href="/wiki/Codec_JPDP" title="Codec JPDP">JPDP</a><b>&#160;·</b> <a href="/wiki/JPEG_XR" title="JPEG XR">JPEG XR/HD Photo</a><b>&#160;·</b> <a href="/wiki/Apple_Icon_Image" title="Apple Icon Image">ICNS</a><b>&#160;·</b> <a href="/wiki/OpenEXR" title="OpenEXR">OpenEXR</a><b>&#160;·</b> <a href="/wiki/OpenRaster" title="OpenRaster">OpenRaster</a><b>&#160;·</b> <a href="/wiki/PCX" title="PCX">PCX</a><b>&#160;·</b> <a href="/w/index.php?title=Progressive_Graphics_File&amp;action=edit&amp;redlink=1" class="new" title="Progressive Graphics File (la pagina non esiste)">PGF</a><b>&#160;·</b> <a href="/wiki/PSD_(formato_di_file)" title="PSD (formato di file)">PSD</a><b>&#160;·</b> <a href="/wiki/Tagged_Image_File_Format" class="mw-redirect" title="Tagged Image File Format">TIFF</a><b>&#160;·</b> <a href="/w/index.php?title=Wireless_Application_Protocol_Bitmap_Format&amp;action=edit&amp;redlink=1" class="new" title="Wireless Application Protocol Bitmap Format (la pagina non esiste)">WBMP</a><b>&#160;·</b> <a href="/wiki/WebP" title="WebP">WebP</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Formato_contenitore" title="Formato contenitore">Contenitore</a></th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;">generico</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/3gp" title="3gp">3gp</a><b>&#160;·</b> <a href="/wiki/Advanced_Systems_Format" title="Advanced Systems Format">ASF</a><b>&#160;·</b> <a href="/wiki/Audio_Video_Interleave" title="Audio Video Interleave">AVI</a><b>&#160;·</b> <a href="/wiki/Bink_Video" title="Bink Video">Bink</a><b>&#160;·</b> <a href="/w/index.php?title=DivX_Media_Format&amp;action=edit&amp;redlink=1" class="new" title="DivX Media Format (la pagina non esiste)">DMF</a><b>&#160;·</b> <a href="/wiki/Digital_Picture_Exchange" title="Digital Picture Exchange">DPX</a><b>&#160;·</b> <a href="/wiki/Adobe_Flash" title="Adobe Flash">FLV</a><b>&#160;·</b> <a href="/wiki/.m2ts" title=".m2ts">M2TS</a><b>&#160;·</b> <a href="/wiki/Matroska" title="Matroska">Matroska</a><b>&#160;·</b> <a href="/wiki/MOD_e_TOD" title="MOD e TOD">MOD</a><b>&#160;·</b> <a href="/wiki/MPEG-4" title="MPEG-4">MP4</a><b>&#160;·</b> <a href="/w/index.php?title=Media_Exchange_Format&amp;action=edit&amp;redlink=1" class="new" title="Media Exchange Format (la pagina non esiste)">MXF</a><b>&#160;·</b> <a href="/w/index.php?title=NUT_(formato_di_file)&amp;action=edit&amp;redlink=1" class="new" title="NUT (formato di file) (la pagina non esiste)">NUT</a><b>&#160;·</b> <a href="/wiki/Ogg" title="Ogg">Ogg</a><b>&#160;·</b> <a href="/wiki/QuickTime" class="mw-redirect" title="QuickTime">QuickTime</a><b>&#160;·</b> <a href="/wiki/RealMedia" title="RealMedia">RealMedia</a><b>&#160;·</b> <a href="/w/index.php?title=Smacker_video&amp;action=edit&amp;redlink=1" class="new" title="Smacker video (la pagina non esiste)">Smacker</a><b>&#160;·</b> <a href="/w/index.php?title=Resource_Interchange_File_Format&amp;action=edit&amp;redlink=1" class="new" title="Resource Interchange File Format (la pagina non esiste)">RIFF</a><b>&#160;·</b> <a href="/wiki/MOD_e_TOD" title="MOD e TOD">TOD</a><b>&#160;·</b> <a href="/wiki/VOB" title="VOB">VOB</a><b>&#160;·</b> <a href="/wiki/WebM" title="WebM">WebM</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">solo audio</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Audio_Interchange_File_Format" title="Audio Interchange File Format">AIFF</a><b>&#160;·</b> <a href="/w/index.php?title=Formato_file_au&amp;action=edit&amp;redlink=1" class="new" title="Formato file au (la pagina non esiste)">AU</a><b>&#160;·</b> <a href="/wiki/WAV" class="mw-redirect" title="WAV">WAV</a><b>&#160;·</b> <a href="/wiki/Broadcast_Wave_Format" title="Broadcast Wave Format">BWF</a><b>&#160;·</b> <a href="/wiki/RF64" title="RF64">RF64</a></td></tr></tbody></table></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r141815314"><table class="navbox mw-collapsible autocollapse noprint metadata" id="navbox-Alta_definizione"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Alta_definizione" title="Template:Alta definizione"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/w/index.php?title=Discussioni_template:Alta_definizione&amp;action=edit&amp;redlink=1" class="new" title="Discussioni template:Alta definizione (la pagina non esiste)"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Alta_definizione&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title">Alta definizione</span></th></tr><tr><th colspan="1" class="navbox_group">Formati</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/High_Definition_Video" title="High Definition Video">HDV</a><b>&#160;·</b> <a href="/wiki/HDTV" title="HDTV">HD</a><b>&#160;·</b> <a href="/wiki/Televisione_a_ultra_alta_definizione" class="mw-redirect" title="Televisione a ultra alta definizione">8K Ultra HD</a><b>&#160;·</b> <a href="/wiki/High_Definition_Audio" title="High Definition Audio">High Definition Audio</a></td></tr><tr><th colspan="1" class="navbox_group">Standard digitale</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/ATSC" title="ATSC">ATSC</a><b>&#160;·</b> <a href="/wiki/Digital_Video_Broadcasting" title="Digital Video Broadcasting">DVB</a><b>&#160;·</b> <a href="/wiki/Standard_televisivo_terrestre#Formati_ISDB-T,_ISDB-C_e_ISDB-S" title="Standard televisivo terrestre">ISDB</a><b>&#160;·</b> <a href="/wiki/Standard_televisivo_terrestre#Formati_ISDB-T,_ISDB-C_e_ISDB-S" title="Standard televisivo terrestre">SBTVD</a><b>&#160;·</b> <a href="/wiki/Digital_Multimedia_Broadcasting" title="Digital Multimedia Broadcasting">DMB-T/H</a></td></tr><tr><th colspan="1" class="navbox_group">Audio</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Dolby_Digital" title="Dolby Digital">Dolby Digital</a> (<a href="/wiki/Dolby_Digital" title="Dolby Digital">5.1</a>)<b>&#160;·</b> <a class="mw-selflink selflink">MPEG-1 Layer II</a><b>&#160;·</b> <a href="/wiki/Modulazione_a_impulsi_codificati" title="Modulazione a impulsi codificati">PCM</a><b>&#160;·</b> <a href="/wiki/Modulazione_a_impulsi_codificati" title="Modulazione a impulsi codificati">LPCM</a><b>&#160;·</b> <a href="/wiki/Digital_eXtreme_Definition" title="Digital eXtreme Definition">DXD</a><b>&#160;·</b> <a href="/wiki/Direct_Stream_Digital" title="Direct Stream Digital">DSD</a><b>&#160;·</b> <a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a></td></tr><tr><th colspan="1" class="navbox_group">Videoregistrazione</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/High_Definition_Video" title="High Definition Video">HDV</a><b>&#160;·</b> <a href="/wiki/Digital_Cinema_Initiatives" title="Digital Cinema Initiatives">DCI</a></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Compressione_video_digitale" title="Compressione video digitale">Compressione e supporti</a></th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Blu-ray_Disc" title="Blu-ray Disc">Blu-ray Disc</a><b>&#160;·</b> <a href="/wiki/CBHD" title="CBHD">CBHD</a><b>&#160;·</b> <a href="/wiki/HD_DVD" title="HD DVD">HD DVD</a><b>&#160;·</b> <a href="/wiki/Ultra_HD_Blu-ray" title="Ultra HD Blu-ray">Ultra HD Blu-ray</a><b>&#160;·</b> <a href="/wiki/Versatile_Multilayer_Disc" title="Versatile Multilayer Disc">HD VMD</a><b>&#160;·</b> <a href="/wiki/D-VHS" title="D-VHS">D-VHS</a><b>&#160;·</b> <a href="/wiki/Super_Audio_CD" title="Super Audio CD">Super Audio CD</a><b>&#160;·</b> <a href="/wiki/DVD-Audio" title="DVD-Audio">DVD-Audio</a><b>&#160;·</b> <a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a><b>&#160;·</b> <a href="/wiki/H.264" title="H.264">H.264</a><b>&#160;·</b> <a href="/wiki/VC-1" title="VC-1">VC-1</a><b>&#160;·</b> <a href="/wiki/Multiview_Video_Coding" title="Multiview Video Coding">MVC</a><b>&#160;·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">H.265/HEVC</a></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Interfaccia_video" title="Interfaccia video">Interfaccia video</a></th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Video_a_componenti" title="Video a componenti">Component</a><b>&#160;·</b> <a href="/wiki/High-Definition_Multimedia_Interface" title="High-Definition Multimedia Interface">HDMI</a><b>&#160;·</b> <a href="/wiki/Digital_Visual_Interface" title="Digital Visual Interface">DVI</a><b>&#160;·</b> <a href="/wiki/DisplayPort" title="DisplayPort">DisplayPort</a><b>&#160;·</b> <a href="/wiki/Video_Graphics_Array" title="Video Graphics Array">VGA</a><b>&#160;·</b> <a href="/wiki/HDBaseT" title="HDBaseT">HDBaseT</a></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Risoluzione_dello_schermo" title="Risoluzione dello schermo">Risoluzione</a></th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/2K" title="2K">2K</a><b>&#160;·</b> <a href="/wiki/4K" title="4K">4K</a><b>&#160;·</b> <a href="/wiki/5K" title="5K">5K</a><b>&#160;·</b> <a href="/wiki/Televisione_a_ultra_alta_definizione" class="mw-redirect" title="Televisione a ultra alta definizione">8K</a><b>&#160;·</b> <a href="/wiki/16K" title="16K">16K</a><b>&#160;·</b> <a href="/wiki/720p" title="720p">720p</a><b>&#160;·</b> <a href="/wiki/1080i" title="1080i">1080i</a><b>&#160;·</b> <a href="/wiki/1080p" title="1080p">1080p</a><b>&#160;·</b> <a href="/wiki/1440p" title="1440p">1440p</a><b>&#160;·</b> <a href="/wiki/2160p" title="2160p">2160p</a><b>&#160;·</b> <a href="/wiki/Televisione_a_ultra_alta_definizione" class="mw-redirect" title="Televisione a ultra alta definizione">4320p</a></td></tr><tr><th colspan="1" class="navbox_group">Standard applicati</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/BT.709" title="BT.709">BT.709</a><b>&#160;·</b> <a href="/wiki/BT.2020" title="BT.2020">BT.2020</a><b>&#160;·</b> <a href="/wiki/High-dynamic-range_video" title="High-dynamic-range video">HDR</a></td></tr></tbody></table> <div class="noprint" style="width:100%; padding: 3px 0; display: flex; flex-wrap: wrap; row-gap: 4px; column-gap: 8px; box-sizing: border-box;"><div style="flex-grow: 1"><style data-mw-deduplicate="TemplateStyles:r140555418">.mw-parser-output .itwiki-template-occhiello{width:100%;line-height:25px;border:1px solid #CCF;background-color:#F0EEFF;box-sizing:border-box}.mw-parser-output .itwiki-template-occhiello-progetto{background-color:#FAFAFA}@media screen{html.skin-theme-clientpref-night .mw-parser-output .itwiki-template-occhiello{background-color:#202122;border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .itwiki-template-occhiello-progetto{background-color:#282929}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .itwiki-template-occhiello{background-color:#202122;border-color:#54595D}html.skin-theme-clientpref-os .mw-parser-output .itwiki-template-occhiello-progetto{background-color:#282929}}</style><div class="itwiki-template-occhiello"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Computer_n_screen.svg" class="mw-file-description" title="Informatica"><img alt="&#160;" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Computer_n_screen.svg/24px-Computer_n_screen.svg.png" decoding="async" width="24" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Computer_n_screen.svg/37px-Computer_n_screen.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/77/Computer_n_screen.svg/48px-Computer_n_screen.svg.png 2x" data-file-width="119" data-file-height="123" /></a></span>&#32;<b><a href="/wiki/Portale:Informatica" title="Portale:Informatica">Portale Informatica</a></b>&#58; accedi alle voci di Wikipedia che trattano di informatica</div></div></div> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐64f8f8dcdb‐5z57d Cached time: 20250221212624 Cache expiry: 2592000 Reduced expiry: false Complications: [show‐toc] CPU time usage: 0.203 seconds Real time usage: 0.296 seconds Preprocessor visited node count: 4196/1000000 Post‐expand include size: 56940/2097152 bytes Template argument size: 1708/2097152 bytes Highest expansion depth: 15/100 Expensive parser function count: 4/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 6859/5000000 bytes Lua time usage: 0.078/10.000 seconds Lua memory usage: 1459900/52428800 bytes Number of Wikibase entities loaded: 1/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 218.622 1 -total 33.91% 74.128 1 Template:Interprogetto 31.73% 69.367 2 Template:Navbox 29.82% 65.190 1 Template:Formati_di_compressione 18.74% 40.979 1 Template:F 17.97% 39.276 1 Template:Avviso 12.65% 27.658 1 Template:Categorie_avviso 12.38% 27.074 1 Template:Portale 9.94% 21.732 3 Template:Rp 9.33% 20.395 4 Template:Navbox_subgroup --> <!-- Saved in parser cache with key itwiki:pcache:1594762:|#|:idhash:canonical and timestamp 20250221212624 and revision id 139182277. Rendering was triggered because: page-view --> </div><!--esi <esi:include src="/esitest-fa8a495983347898/content" /> --><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&amp;type=1x1&amp;usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Estratto da "<a dir="ltr" href="https://it.wikipedia.org/w/index.php?title=MPEG-1_Layer_II&amp;oldid=139182277">https://it.wikipedia.org/w/index.php?title=MPEG-1_Layer_II&amp;oldid=139182277</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Categoria:Categorie" title="Categoria:Categorie">Categorie</a>: <ul><li><a href="/wiki/Categoria:Codec_audio" title="Categoria:Codec audio">Codec audio</a></li><li><a href="/wiki/Categoria:MPEG" title="Categoria:MPEG">MPEG</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Categorie nascoste: <ul><li><a href="/wiki/Categoria:Senza_fonti_-_informatica" title="Categoria:Senza fonti - informatica">Senza fonti - informatica</a></li><li><a href="/wiki/Categoria:Senza_fonti_-_luglio_2014" title="Categoria:Senza fonti - luglio 2014">Senza fonti - luglio 2014</a></li><li><a href="/wiki/Categoria:Collegamento_interprogetto_a_Wikisource_presente_ma_assente_su_Wikidata" title="Categoria:Collegamento interprogetto a Wikisource presente ma assente su Wikidata">Collegamento interprogetto a Wikisource presente ma assente su Wikidata</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Questa pagina è stata modificata per l'ultima volta il&#160;7 mag 2024 alle 14:59.</li> <li id="footer-info-copyright">Il testo è disponibile secondo la <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.it">licenza Creative Commons Attribuzione-Condividi allo stesso modo</a>; possono applicarsi condizioni ulteriori. Vedi le <a class="external text" href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use/it">condizioni d'uso</a> per i dettagli.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy/it">Informativa sulla privacy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:Sala_stampa/Wikipedia">Informazioni su Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:Avvertenze_generali">Avvertenze</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Codice di condotta</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Sviluppatori</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/it.wikipedia.org">Statistiche</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Dichiarazione sui cookie</a></li> <li id="footer-places-mobileview"><a href="//it.m.wikipedia.org/w/index.php?title=MPEG-1_Layer_II&amp;mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Versione mobile</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/static/images/footer/wikimedia-button.svg" width="84" height="29"><img src="/static/images/footer/wikimedia.svg" width="25" height="25" alt="Wikimedia Foundation" lang="en" loading="lazy"></picture></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/w/resources/assets/poweredby_mediawiki.svg" width="88" height="31"><img src="/w/resources/assets/mediawiki_compact.svg" alt="Powered by MediaWiki" width="25" height="25" loading="lazy"></picture></a></li> </ul> </footer> </div> </div> </div> <div class="vector-header-container vector-sticky-header-container"> <div id="vector-sticky-header" class="vector-sticky-header"> <div class="vector-sticky-header-start"> <div class="vector-sticky-header-icon-start vector-button-flush-left vector-button-flush-right" aria-hidden="true"> <button class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-sticky-header-search-toggle" tabindex="-1" data-event-name="ui.vector-sticky-search-form.icon"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Ricerca</span> </button> </div> <div role="search" class="vector-search-box-vue vector-search-box-show-thumbnail vector-search-box"> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail"> <form action="/w/index.php" id="vector-sticky-search-form" class="cdx-search-input cdx-search-input--has-end-button"> <div 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 in Wikipedia"> <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Speciale:Ricerca"> </div> <button class="cdx-button cdx-search-input__end-button">Ricerca</button> </form> </div> </div> </div> <div class="vector-sticky-header-context-bar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-sticky-header-toc" class="vector-dropdown mw-portlet mw-portlet-sticky-header-toc vector-sticky-header-toc vector-button-flush-left" > <input type="checkbox" id="vector-sticky-header-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-sticky-header-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l&#039;indice" > <label id="vector-sticky-header-toc-label" for="vector-sticky-header-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">Mostra/Nascondi l&#039;indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-sticky-header-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div class="vector-sticky-header-context-bar-primary" aria-hidden="true" ><span class="mw-page-title-main">MPEG-1 Layer II</span></div> </div> </div> <div class="vector-sticky-header-end" aria-hidden="true"> <div class="vector-sticky-header-icons"> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-talk-sticky-header" tabindex="-1" data-event-name="talk-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbles mw-ui-icon-wikimedia-speechBubbles"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-subject-sticky-header" tabindex="-1" data-event-name="subject-sticky-header"><span class="vector-icon mw-ui-icon-article mw-ui-icon-wikimedia-article"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-history-sticky-header" tabindex="-1" data-event-name="history-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-history mw-ui-icon-wikimedia-wikimedia-history"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only mw-watchlink" id="ca-watchstar-sticky-header" tabindex="-1" data-event-name="watch-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-star mw-ui-icon-wikimedia-wikimedia-star"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-ve-edit-sticky-header" tabindex="-1" data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>15 lingue</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Aggiungi argomento</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-d8647bfd6-w9smj","wgBackendResponseTime":172,"wgPageParseReport":{"limitreport":{"cputime":"0.203","walltime":"0.296","ppvisitednodes":{"value":4196,"limit":1000000},"postexpandincludesize":{"value":56940,"limit":2097152},"templateargumentsize":{"value":1708,"limit":2097152},"expansiondepth":{"value":15,"limit":100},"expensivefunctioncount":{"value":4,"limit":500},"unstrip-depth":{"value":0,"limit":20},"unstrip-size":{"value":6859,"limit":5000000},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 218.622 1 -total"," 33.91% 74.128 1 Template:Interprogetto"," 31.73% 69.367 2 Template:Navbox"," 29.82% 65.190 1 Template:Formati_di_compressione"," 18.74% 40.979 1 Template:F"," 17.97% 39.276 1 Template:Avviso"," 12.65% 27.658 1 Template:Categorie_avviso"," 12.38% 27.074 1 Template:Portale"," 9.94% 21.732 3 Template:Rp"," 9.33% 20.395 4 Template:Navbox_subgroup"]},"scribunto":{"limitreport-timeusage":{"value":"0.078","limit":"10.000"},"limitreport-memusage":{"value":1459900,"limit":52428800}},"cachereport":{"origin":"mw-web.eqiad.main-64f8f8dcdb-5z57d","timestamp":"20250221212624","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"MPEG-1 Layer II","url":"https:\/\/it.wikipedia.org\/wiki\/MPEG-1_Layer_II","sameAs":"http:\/\/www.wikidata.org\/entity\/Q592654","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q592654","author":{"@type":"Organization","name":"Contributori ai progetti Wikimedia"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2008-02-09T04:17:28Z","dateModified":"2024-05-07T13:59:37Z","headline":"formato di compressione audio"}</script> </body> </html>

Pages: 1 2 3 4 5 6 7 8 9 10