CINXE.COM

<!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>H.263 - 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":"baf717fe-1301-4b96-b2cd-bd05e9975379","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"H.263","wgTitle":"H.263","wgCurRevisionId":132655365,"wgRevisionId":132655365,"wgArticleId":1098476,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["Voci con codice LCCN","Voci con codice J9U","Voci non biografiche con codici di controllo di autorità","Codec video","Standard ISO"],"wgPageViewLanguage":"it","wgPageContentLanguage":"it","wgPageContentModel":"wikitext","wgRelevantPageName":"H.263","wgRelevantArticleId":1098476,"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":10000,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q1063983","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":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"};RLPAGEMODULES=["mediawiki.page.media","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&modules=ext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=it&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.21"> <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 property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/9/93/Typical_H.323_Stack.png"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="720"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Typical_H.323_Stack.png/800px-Typical_H.323_Stack.png"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="480"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Typical_H.323_Stack.png/640px-Typical_H.323_Stack.png"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="384"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="H.263 - 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/H.263"> <link rel="alternate" type="application/x-wiki" title="Modifica" href="/w/index.php?title=H.263&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/H.263"> <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&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-H_263 rootpage-H_263 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'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&wmf_medium=sidebar&wmf_campaign=it.wikipedia.org&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&returnto=H.263" title="Si consiglia di registrarsi e di effettuare l'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&returnto=H.263" title="Si consiglia di effettuare l'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&wmf_medium=sidebar&wmf_campaign=it.wikipedia.org&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&returnto=H.263" title="Si consiglia di registrarsi e di effettuare l'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&returnto=H.263" title="Si consiglia di effettuare l'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"></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-Versioni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Versioni"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Versioni</span> </div> </a> <button aria-controls="toc-Versioni-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 Versioni</span> </button> <ul id="toc-Versioni-sublist" class="vector-toc-list"> <li id="toc-H.263v2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#H.263v2"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>H.263v2</span> </div> </a> <ul id="toc-H.263v2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-H.263v3" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#H.263v3"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>H.263v3</span> </div> </a> <ul id="toc-H.263v3-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Applicazioni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Applicazioni"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Applicazioni</span> </div> </a> <ul id="toc-Applicazioni-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-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'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'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">H.263</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'altra lingua. Disponibile in 16 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-16" 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">16 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/H.263" title="H.263 - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="H.263" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/H.263" title="H.263 - bulgaro" lang="bg" hreflang="bg" data-title="H.263" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/H.263" title="H.263 - tedesco" lang="de" hreflang="de" data-title="H.263" 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/H.263" title="H.263 - inglese" lang="en" hreflang="en" data-title="H.263" 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/H.263" title="H.263 - spagnolo" lang="es" hreflang="es" data-title="H.263" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/H.263" title="H.263 - persiano" lang="fa" hreflang="fa" data-title="H.263" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/H.263" title="H.263 - finlandese" lang="fi" hreflang="fi" data-title="H.263" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/H.263" title="H.263 - francese" lang="fr" hreflang="fr" data-title="H.263" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/H.263" title="H.263 - giapponese" lang="ja" hreflang="ja" data-title="H.263" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/H.263" title="H.263 - coreano" lang="ko" hreflang="ko" data-title="H.263" 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/H.263" title="H.263 - polacco" lang="pl" hreflang="pl" data-title="H.263" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/H.263" title="H.263 - rumeno" lang="ro" hreflang="ro" data-title="H.263" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/H.263" title="H.263 - russo" lang="ru" hreflang="ru" data-title="H.263" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/H.263" title="H.263 - ucraino" lang="uk" hreflang="uk" data-title="H.263" 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/H.263" title="H.263 - yoruba" lang="yo" hreflang="yo" data-title="H.263" 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/H.263" title="H.263 - cinese" lang="zh" hreflang="zh" data-title="H.263" 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/Q1063983#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/H.263" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussione:H.263" rel="discussion" title="Vedi le discussioni relative a questa pagina [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/H.263"><span>Leggi</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=H.263&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=H.263&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=H.263&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/H.263"><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=H.263&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=H.263&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=H.263&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/H.263" 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/H.263" 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=H.263&oldid=132655365" 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=H.263&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&page=H.263&id=132655365&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&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FH.263"><span>Ottieni URL breve</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speciale:QrCode&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FH.263"><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&bookcmd=book_creator&referer=H.263"><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&page=H.263&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=H.263&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/Q1063983" title="Collegamento all'elemento connesso dell'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'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"><p>Il <a href="/wiki/Codec_video" title="Codec video">codec video</a> <b>H.263</b> fu originariamente creato dall'<a href="/wiki/ITU-T" title="ITU-T">ITU-T</a> nel 1995/1996 come codec compresso con un basso bitrate per applicazioni di <a href="/wiki/Videoconferenza" title="Videoconferenza">videoconferenza</a>. </p> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Typical_H.323_Stack.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/93/Typical_H.323_Stack.png/500px-Typical_H.323_Stack.png" decoding="async" width="500" height="300" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/93/Typical_H.323_Stack.png/750px-Typical_H.323_Stack.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/93/Typical_H.323_Stack.png/1000px-Typical_H.323_Stack.png 2x" data-file-width="1152" data-file-height="691" /></a><figcaption></figcaption></figure> <p><br /> Esso fa parte della famiglia H.26x ed è stato progettato per essere utilizzato nei sistemi basati su <a href="/wiki/H.324" title="H.324">H.324</a> (<a href="/wiki/Public_Switched_Telephone_Network" class="mw-redirect" title="Public Switched Telephone Network">PSTN</a> e altre reti commutate di videoconferenza e telefonate), ma ha anche trovato uso nel protocollo <a href="/wiki/H.323" title="H.323">H.323</a> (video-conferenze basate su <a href="/wiki/Real-time_Transport_Protocol" title="Real-time Transport Protocol">RTP</a>/IP), <a href="/wiki/H.320" title="H.320">H.320</a> (video-conferenze basate su <a href="/wiki/Integrated_Services_Digital_Network" title="Integrated Services Digital Network">ISDN</a>), <a href="/wiki/Real_Time_Streaming_Protocol" title="Real Time Streaming Protocol">RTSP</a> (<a href="/wiki/Streaming" title="Streaming">Streaming</a>) e <a href="/wiki/Session_Initiation_Protocol" title="Session Initiation Protocol">SIP</a> (conferenze via Internet). Molti dei contenuti <a href="/wiki/FLV" class="mw-redirect" title="FLV">FLV</a> (video flash usati su siti come <a href="/wiki/YouTube" title="YouTube">YouTube</a>, <a href="/wiki/Google_Video" title="Google Video">Google Video</a>, <a href="/wiki/MySpace" class="mw-redirect" title="MySpace">MySpace</a> ecc.) sono compressi con questo codec, anche se alcuni siti usano adesso la compressione <a href="/wiki/VP6" title="VP6">VP6</a>, supportata da Flash a partire dalla versione 8. I video H.263 possono essere decodificati con la libreria <a href="/wiki/Libavcodec" title="Libavcodec">libavcodec</a> (con licenza <a href="/wiki/LGPL" class="mw-redirect" title="LGPL">LGPL</a> e parte del progetto <a href="/wiki/FFmpeg" title="FFmpeg">FFmpeg</a>) che è usata da programmi come <a href="/w/index.php?title=Ffdshow&action=edit&redlink=1" class="new" title="Ffdshow (la pagina non esiste)">ffdshow</a>, <a href="/wiki/VLC_media_player" title="VLC media player">VLC media player</a> e <a href="/wiki/MPlayer" title="MPlayer">MPlayer</a>. </p><p><br /> L'H.263 è stato sviluppato come un miglioramento del codec <a href="/wiki/H.261" title="H.261">H.261</a>, il precedente standard ITU-T per la compressione video, e gli standard <a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a> e <a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a>. La prima versione fu completata nel 1995 ed era un sostituto adeguato al codec <a href="/wiki/H.261" title="H.261">H.261</a> a tutti i bitrate. Fu ulteriormente migliorato nei progetti conosciuti come <a class="mw-selflink-fragment" href="#H.263v2">H.263v2</a> (conosciuto anche come H.263+ o H.263 1998) e <a class="mw-selflink-fragment" href="#H.263v3">H.263v3</a> (conosciuto anche come H.263++ o H.263 2000). </p><p>Molti <a href="/wiki/Telefono_cellulare" title="Telefono cellulare">telefoni celluari</a> e <a href="/wiki/Smartphone" title="Smartphone">smartphone</a> degli <a href="/wiki/Anni_2000" title="Anni 2000">anni 2000</a> e dei primi <a href="/wiki/Anni_2010" title="Anni 2010">anni 2010</a> registrano i video con la loro <a href="/wiki/Fotocamera_frontale" title="Fotocamera frontale">fotocamera</a>, utilizzando come codec l'H.263 e come <a href="/wiki/Formato_contenitore" title="Formato contenitore">formato contenitore</a> il <a href="/wiki/3gp" title="3gp">3gp</a>. </p><p>Lo standard supporta vari formati video, ad esempio i formati di tipo <a href="/wiki/Common_Intermediate_Format" title="Common Intermediate Format">CIF</a> (SQCIF, QCIF, CIF, 4CIF, 9CIF e 16CIF). </p><p><br /> Il codec successivo sviluppato dall'ITU-T <a href="/wiki/VCEG" class="mw-redirect" title="VCEG">VCEG</a> (in collaborazione con <a href="/wiki/MPEG" title="MPEG">MPEG</a>) dopo l'H.263 è lo standard <a href="/wiki/H.264" title="H.264">H.264</a>, conosciuto anche come AVC e <a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4</a> part 10. Poiché l'H.264 fornisce un miglioramento significativo rispetto all'H.263, lo sviluppo di quest'ultimo è considerato ormai solo per questioni di retrocompatibilità. La maggior parte dei prodotti per le video-conferenze includono ora sia l'H.264, sia l'H.263, sia l'H.261. </p><p><br /> L'H.263 supporta <a href="/wiki/Risoluzione_(grafica)" title="Risoluzione (grafica)">risoluzioni video</a> fino a 1408×1152 <a href="/wiki/Pixel" title="Pixel">pixel</a> (16CIF). </p><p>Risoluzioni video superiori come il <a href="/wiki/Full_HD" class="mw-redirect" title="Full HD">Full HD</a> e il <a href="/wiki/4K" title="4K">4K</a> necessitano l'utilizzo d'altri codec, ad esempio dell'H.264. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Versioni">Versioni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&veaction=edit&section=1" title="Modifica la sezione Versioni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=H.263&action=edit&section=1" title="Edit section's source code: Versioni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Dall'originale ratificazione dell'H.263 nel marzo 1996 (con l'approvazione di un documento prodotto nel novembre 1995), ci sono state due seguenti aggiunte che migliorarono il codec originale con l'aggiunta di estensioni opzionali (annexes). Per esempio, l'H.263v2 aggiunse un filtro debloccante (deblocking filter) attraverso l'Annex J. </p><p>L'originale H.263 specificava le seguenti estensioni: </p> <ul><li>Annex A - Specifica precisione della trasformazione inversa (Inverse transform accuracy specification)</li> <li>Annex B - Decodificatore ipotetico standard(Hypothetical Reference Decoder)</li> <li>Annex C - Considerazioni per il Multipoint (Considerations for Multipoint)</li> <li>Annex D - Metodo non restrittivo sui vettori di moto (Unrestricted Motion Vector mode)</li> <li>Annex E - Metodo di codifica aritmetica (Syntax-based Arithmetic Coding mode)</li> <li>Annex F - Metodo avanzato di predizione (Advanced Prediction mode)</li> <li>Annex G - Immagini P-B (PB-frames mode)</li> <li>Annex H - Correzione errori per il segnale video (Forward Error Correction for coded video signal)</li></ul> <p>Nel marzo 1997, l'estensione Annex I che descriveva il tracciamento degli errori (Error Tracking) — una tecnica di codifica per migliorare la robustezza di fronte alle perdite di dati e agli errori — fu approvata per fornire informazioni per l'aiuto degli sviluppatori che avevano intenzione di implementare questa tecnica. </p> <div class="mw-heading mw-heading3"><h3 id="H.263v2">H.263v2</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&veaction=edit&section=2" title="Modifica la sezione H.263v2" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=H.263&action=edit&section=2" title="Edit section's source code: H.263v2"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'H.263v2 (conosciuto anche come H.263+ o come la versione 1998 dell'H.263) è il nome informale della seconda edizione dello standard ITU-T H.263. Conserva tutte le capacità della versione originale dello standard, ma potenzi le capacità dell'H.263 aggiungendo molte estensioni che possono migliorare sostanzialmente l'efficienza della codifica e fornire altre funzioni (come la robustezza migliorata contro le perdite di dati nel canale di trasmissione). Il progetto H.263+ fu ratificato dall'ITU nel febbraio del 1998 e aggiunse le seguenti estensioni: </p> <ul><li>Annex I - Modalità di codifica avanzata INTRA (Advanced INTRA Coding mode)</li> <li>Annex J - Filtro debloccante</li> <li>Annex K - Slice Structured mode</li> <li>Annex L - Supplemental Enhancement Information Specification</li> <li>Annex M - Migliorata modalità Immagini PB (Improved PB-frames mode)</li> <li>Annex N - Reference Picture Selection mode</li> <li>Annex O - Metodo di scalabilità temporale, SNR e spaziale (Temporal, SNR, and Spatial Scalability mode)</li> <li>Annex P - Reference picture resampling</li> <li>Annex Q - Reduced-Resolution Update mode (see implementors' guide correction as noted below)</li> <li>Annex R - Independent Segment Decoding mode</li> <li>Annex S - Alternative INTER VLC mode</li> <li>Annex T - Modified Quantization mode</li></ul> <p>L'H.263v2 aggiunse inoltre il supporto flessibile per personalizzare il formato delle immagini e il tempo (picture clock frequencies). Precedentemente i soli possibili formati supportati dall'H.263 erano stati Sub-QCIF, QCIF, <a href="/wiki/Common_Intermediate_Format" title="Common Intermediate Format">CIF</a>, 4CIF, e 16CIF, e l'unica frequenza delle immagini era 30000/1001 (approssimativamente 29.97) <i>clock ticks</i> al secondo. </p><p>L'H.263v2 specificava un set di modalità raccomandate in un'appendice informativa (Appendice II, deprecata da allora): </p> <table class="wikitable" border="1" cellpadding="1" cellspacing="1" style="font-size: 100%; text-align: center;"> <tbody><tr> <th> </th> <th>Livello 1 </th> <th>Livello 2 </th> <th>Livello 3 </th></tr> <tr> <th>Advanced INTRA Coding </th> <td>Sì </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Filtro debloccante </th> <td>Sì </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Supplemental Enhancement Information (Full-Frame Freeze Only) </th> <td>Sì </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Quantizzazione modificata </th> <td>Sì </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Metodo non restrittivo sui vettori di moto </th> <td>No </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Slice Structured Mode </th> <td>No </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Reference Picture Resampling (Soltanto modalità Implicit Factor-of-4) </th> <td>No </td> <td>Sì </td> <td>Sì </td></tr> <tr> <th>Metodo avanzato di predizione </th> <td>No </td> <td>No </td> <td>Sì </td></tr> <tr> <th>Immagini PB migliorate </th> <td>No </td> <td>No </td> <td>Sì </td></tr> <tr> <th>Independent Segment Decoding </th> <td>No </td> <td>No </td> <td>Sì </td></tr> <tr> <th>Alternate INTER VLC </th> <td>No </td> <td>No </td> <td>Sì </td></tr> <tr> <th> </th> <th>Livello 1 </th> <th>Livello 2 </th> <th>Livello 3 </th></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="H.263v3">H.263v3</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&veaction=edit&section=3" title="Modifica la sezione H.263v3" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=H.263&action=edit&section=3" title="Edit section's source code: H.263v3"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La definizione dell'H.263v3 (conosciuto anche come H.263++ o come la versione 2000 dell'H.263) consisteva nell'aggiunta di tre estensioni. Queste estensioni e un'estensione aggiuntiva che specificava i profili (approvata l'anno seguente) furono originariamente pubblicate come documenti separati dal testo principale dello standard. Le estensioni aggiuntive specificate erano: </p> <ul><li>Annex U - Enhanced reference picture selection mode</li> <li>Annex V - Data-partitioned slice mode</li> <li>Annex W - Additional supplemental enhancement information specification</li> <li>Annex X (specificata originariamente nel 2001) - Definizioni di profili e livelli (Profiles and levels definition)</li></ul> <p>L'informativa precedente Appendix II (miglioramenti opzionali raccomandati) diventò obsoleta con la creazione della normativa Annex X. </p><p>Nel giugno 2001 un'altra informativa (Appendix III, Esempi per l'implementazione di un encoder/decoder H.263) fu approvata. Descrive le tecniche di codifica e ciò che riguarda gli errori e le perdite dei decoder. </p><p>Nel gennaio 2005, un documento unificato di specifica h.263 fu prodotto (con l'esclusione dell'Appendix III, che rimane un documento pubblicato separatamente). </p><p>Nell'agosto 2005, una guida degli implementatori fu approvata per correggere un piccolo errore nella poco usata estensione Annex Q reduced-resolution update mode. </p> <div class="mw-heading mw-heading2"><h2 id="Applicazioni">Applicazioni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&veaction=edit&section=4" title="Modifica la sezione Applicazioni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=H.263&action=edit&section=4" title="Edit section's source code: Applicazioni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>I video H.263 possono essere decodificati con la libreria gratuita (sotto licenza <a href="/wiki/LGPL" class="mw-redirect" title="LGPL">LGPL</a>) <a href="/wiki/Libavcodec" title="Libavcodec">libavcodec</a> (parte del progetto <a href="/w/index.php?title=Ffmpeg&action=edit&redlink=1" class="new" title="Ffmpeg (la pagina non esiste)">ffmpeg</a>) che è usata da programmi come <a href="/w/index.php?title=Ffdshow&action=edit&redlink=1" class="new" title="Ffdshow (la pagina non esiste)">ffdshow</a>, <a href="/wiki/VLC_media_player" title="VLC media player">VLC media player</a> e <a href="/wiki/MPlayer" title="MPlayer">MPlayer</a>.</li> <li>La maggior parte dei contenuti <a href="/wiki/Flash_Video" title="Flash Video">FLV</a> (usati su siti come <a href="/wiki/YouTube" title="YouTube">YouTube</a>, <a href="/wiki/Google_Video" title="Google Video">Google Video</a>, <a href="/wiki/MySpace" class="mw-redirect" title="MySpace">MySpace</a> etc.) è codificata in questo formato, anche se alcuni siti usano adesso la compressione <a href="/wiki/VP6" title="VP6">VP6</a>, supportata da Flash a partire dalla versione 8.</li> <li>La versione originale del codec <a href="/wiki/Real_Video" class="mw-redirect" title="Real Video">Real Video</a> era basata sull'H.263 fino alla distribuzione di RealVideo 8.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&veaction=edit&section=5" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=H.263&action=edit&section=5" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://itu.int/rec/T-REC-H"><span style="font-style:italic;">Specifiche dell'H.263 sul sito dell'ITU (in inglese)</span></a>, su <span style="font-style:italic;">itu.int</span>.</cite></li> <li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://members.aol.com/SlavTrainr/STsPage.html"><span style="font-style:italic;">I263 video codec (in inglese)</span></a>, su <span style="font-style:italic;">members.aol.com</span>.</cite></li> <li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www4.informatik.uni-erlangen.de/Projects/ScalVico/vic/"><span style="font-style:italic;">Implementazione dell'H.263 in vic (codice sorgente disponibile, in inglese)</span></a>, su <span style="font-style:italic;">www4.informatik.uni-erlangen.de</span>.</cite></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070501013429/http://www.video-demystified.com/">Video Demystified</a> - Libro con informazioni sull'H.263 (in inglese)</li> <li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20070418053236/http://www.compression-links.info/H.261_H.263"><span style="font-style:italic;">Lista di risorse sull'H.261-H.263 (in inglese)</span></a>, su <span style="font-style:italic;">compression-links.info</span>. <small>URL consultato il 30 aprile 2007</small> <small>(archiviato dall'<abbr title="http://www.compression-links.info/H.261_H.263">url originale</abbr> il 18 aprile 2007)</small>.</cite></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> · <a href="/wiki/Discussioni_template:Formati_di_compressione" title="Discussioni template:Formati di compressione"><span title="Discuti del template">D</span></a> · <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Formati_di_compressione&action=edit"><span title="Modifica il template. Usa l'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/Organizzazione_internazionale_per_la_normazione" title="Organizzazione internazionale per la normazione">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> ·</b> <a href="/wiki/JPEG_2000#Motion_JPEG_2000" title="JPEG 2000">Motion JPEG 2000</a><b> ·</b> <a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a><b> ·</b> <a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a><b> ·</b> <a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4 ASP</a><b> ·</b> <a href="/wiki/H.264" title="H.264">MPEG-4 AVC</a><b> ·</b> <a href="/wiki/Multiview_Video_Coding" title="Multiview Video Coding">MVC</a><b> ·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">MPEG-H Part 2 / HEVC</a><b> ·</b> <a href="/w/index.php?title=Versatile_Video_Codec&action=edit&redlink=1" class="new" title="Versatile Video Codec (la pagina non esiste)">MPEG-I Part 3 / VVC</a><b> ·</b> <a href="/w/index.php?title=MPEG-5&action=edit&redlink=1" class="new" title="MPEG-5 (la pagina non esiste)">MPEG-5</a> (<a href="/w/index.php?title=Essential_Video_Coding&action=edit&redlink=1" class="new" title="Essential Video Coding (la pagina non esiste)">Part1/EVC</a><b> ·</b> <a href="/w/index.php?title=LCEVC&action=edit&redlink=1" class="new" title="LCEVC (la pagina non esiste)">Part2/LC EVC</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/H.120" title="H.120">H.120</a><b> ·</b> <a href="/wiki/H.261" title="H.261">H.261</a><b> ·</b> <a href="/wiki/H.262" title="H.262">H.262</a><b> ·</b> <a class="mw-selflink selflink">H.263</a><b> ·</b> <a href="/wiki/H.264" title="H.264">H.264</a><b> ·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">H.265</a><b> ·</b> <a href="/w/index.php?title=Versatile_Video_Codec&action=edit&redlink=1" class="new" title="Versatile Video Codec (la pagina non esiste)">H.266</a><b> ·</b> <a href="/w/index.php?title=Enhanced_Coding_Model&action=edit&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)&action=edit&redlink=1" class="new" title="AMV (formato video) (la pagina non esiste)">AMV</a><b> ·</b> <a href="/wiki/AOMedia_Video_1" title="AOMedia Video 1">AV1</a><b> ·</b> <a href="/wiki/Audio_Video_Standard" title="Audio Video Standard">AVS</a><b> ·</b> <a href="/wiki/Bink_Video" title="Bink Video">Bink</a><b> ·</b> <a href="/w/index.php?title=Daala_(codec_video)&action=edit&redlink=1" class="new" title="Daala (codec video) (la pagina non esiste)">Daala</a><b> ·</b> <a href="/w/index.php?title=Dirac_(codec_video)&action=edit&redlink=1" class="new" title="Dirac (codec video) (la pagina non esiste)">Dirac</a><b> ·</b> <a href="/wiki/DNxHD" title="DNxHD">DNxHD</a><b> ·</b> <a href="/wiki/FFV1" title="FFV1">FFV1</a><b> ·</b> <a href="/wiki/Huffyuv" title="Huffyuv">Huffyuv</a><b> ·</b> <a href="/wiki/Indeo_Video" title="Indeo Video">Indeo</a><b> ·</b> <a href="/wiki/Pixlet" title="Pixlet">Pixlet</a><b> ·</b> <a href="/wiki/ProRes" title="ProRes">ProRes</a><b> ·</b> <a href="/wiki/RealVideo" title="RealVideo">RealVideo</a><b> ·</b> <a href="/w/index.php?title=RTVideo&action=edit&redlink=1" class="new" title="RTVideo (la pagina non esiste)">RTVideo</a><b> ·</b> <a href="/w/index.php?title=SheerVideo&action=edit&redlink=1" class="new" title="SheerVideo (la pagina non esiste)">SheerVideo</a><b> ·</b> <a href="/w/index.php?title=Smacker_video&action=edit&redlink=1" class="new" title="Smacker video (la pagina non esiste)">Smacker</a><b> ·</b> <a href="/w/index.php?title=Snow_(codec)&action=edit&redlink=1" class="new" title="Snow (codec) (la pagina non esiste)">Snow</a><b> ·</b> <a href="/wiki/Codec_Sorenson" title="Codec Sorenson">Sorenson</a><b> ·</b> <a href="/wiki/Theora" title="Theora">Theora</a><b> ·</b> <a href="/wiki/VC-1" title="VC-1">VC-1</a><b> ·</b> <a href="/wiki/VP6" title="VP6">VP6</a><b> ·</b> <a href="/wiki/VP7" title="VP7">VP7</a><b> ·</b> <a href="/wiki/VP8" title="VP8">VP8</a><b> ·</b> <a href="/wiki/VP9" title="VP9">VP9</a><b> ·</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> ·</b> <a href="/w/index.php?title=HE-AAC&action=edit&redlink=1" class="new" title="HE-AAC (la pagina non esiste)">HE-AAC</a><b> ·</b> <a href="/w/index.php?title=HE-AAC_v2&action=edit&redlink=1" class="new" title="HE-AAC v2 (la pagina non esiste)">HE-AAC v2</a><b> ·</b> <a href="/wiki/MPEG-1_Layer_I" title="MPEG-1 Layer I">MPEG-1 Layer I</a><b> ·</b> <a href="/wiki/MPEG-1_Layer_II" title="MPEG-1 Layer II">MPEG-1 Layer II</a><b> ·</b> <a href="/wiki/MP3" title="MP3">MPEG-1 Layer III (MP3)</a><b> ·</b> <a href="/w/index.php?title=MPEG-2_Layer_I&action=edit&redlink=1" class="new" title="MPEG-2 Layer I (la pagina non esiste)">MPEG-2 Layer I</a><b> ·</b> <a href="/w/index.php?title=MPEG-2_Layer_II&action=edit&redlink=1" class="new" title="MPEG-2 Layer II (la pagina non esiste)">MPEG-2 Layer II</a><b> ·</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> ·</b> <a href="/wiki/G.722" title="G.722">G.722</a><b> ·</b> <a href="/w/index.php?title=G.722.1&action=edit&redlink=1" class="new" title="G.722.1 (la pagina non esiste)">G.722.1</a><b> ·</b> <a href="/w/index.php?title=G.722.2&action=edit&redlink=1" class="new" title="G.722.2 (la pagina non esiste)">G.722.2</a><b> ·</b> <a href="/wiki/G.723" title="G.723">G.723</a><b> ·</b> <a href="/w/index.php?title=G.723.1&action=edit&redlink=1" class="new" title="G.723.1 (la pagina non esiste)">G.723.1</a><b> ·</b> <a href="/w/index.php?title=G.726&action=edit&redlink=1" class="new" title="G.726 (la pagina non esiste)">G.726</a><b> ·</b> <a href="/w/index.php?title=G.728&action=edit&redlink=1" class="new" title="G.728 (la pagina non esiste)">G.728</a><b> ·</b> <a href="/wiki/G.729" title="G.729">G.729</a><b> ·</b> <a href="/w/index.php?title=G.729.1&action=edit&redlink=1" class="new" title="G.729.1 (la pagina non esiste)">G.729.1</a><b> ·</b> <a href="/w/index.php?title=G.729a&action=edit&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> ·</b> <a href="/wiki/Adaptive_Multi-Rate" title="Adaptive Multi-Rate">AMR</a><b> ·</b> <a href="/wiki/Apple_Lossless_Encoding" title="Apple Lossless Encoding">Apple Lossless</a><b> ·</b> <a href="/wiki/AptX" title="AptX">aptX</a><b> ·</b> <a href="/wiki/ATRAC" title="ATRAC">ATRAC</a><b> ·</b> <a href="/w/index.php?title=Constrained_Energy_Lapped_Transform&action=edit&redlink=1" class="new" title="Constrained Energy Lapped Transform (la pagina non esiste)">CELT</a><b> ·</b> <a href="/wiki/Free_Lossless_Audio_Codec" title="Free Lossless Audio Codec">FLAC</a><b> ·</b> <a href="/wiki/Internet_Low_Bit_Rate_Codec" title="Internet Low Bit Rate Codec">iLBC</a><b> ·</b> <a href="/wiki/Monkey%27s_Audio" title="Monkey's Audio">Monkey's Audio</a><b> ·</b> <a href="/w/index.php?title=%CE%9C-law_algorithm&action=edit&redlink=1" class="new" title="Μ-law algorithm (la pagina non esiste)">μ-law</a><b> ·</b> <a href="/wiki/Musepack" title="Musepack">Musepack</a><b> ·</b> <a href="/w/index.php?title=Nellymoser_Asao_Codec_in_Flash&action=edit&redlink=1" class="new" title="Nellymoser Asao Codec in Flash (la pagina non esiste)">Nellymoser</a><b> ·</b> <a href="/w/index.php?title=OptimFROG&action=edit&redlink=1" class="new" title="OptimFROG (la pagina non esiste)">OptimFROG</a><b> ·</b> <a href="/wiki/Opus_(codec_audio)" title="Opus (codec audio)">Opus</a><b> ·</b> <a href="/wiki/RealAudio" title="RealAudio">RealAudio</a><b> ·</b> <a href="/w/index.php?title=RTAudio&action=edit&redlink=1" class="new" title="RTAudio (la pagina non esiste)">RTAudio</a><b> ·</b> <a href="/w/index.php?title=Shorten&action=edit&redlink=1" class="new" title="Shorten (la pagina non esiste)">SHN</a><b> ·</b> <a href="/wiki/SILK" title="SILK">SILK</a><b> ·</b> <a href="/w/index.php?title=Siren_Codec&action=edit&redlink=1" class="new" title="Siren Codec (la pagina non esiste)">Siren</a><b> ·</b> <a href="/wiki/Speex" title="Speex">Speex</a><b> ·</b> <a href="/w/index.php?title=TAK_(audio_codec)&action=edit&redlink=1" class="new" title="TAK (audio codec) (la pagina non esiste)">TAK</a><b> ·</b> <a href="/wiki/Vorbis" title="Vorbis">Vorbis</a><b> ·</b> <a href="/w/index.php?title=WavPack&action=edit&redlink=1" class="new" title="WavPack (la pagina non esiste)">WavPack</a><b> ·</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'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> ·</b> <a href="/wiki/JPEG" title="JPEG">JPEG</a><b> ·</b> <a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a><b> ·</b> <a href="/wiki/JPEG_XL" title="JPEG XL">JPEG XL</a><b> ·</b> <a href="/w/index.php?title=JBIG&action=edit&redlink=1" class="new" title="JBIG (la pagina non esiste)">JBIG</a><b> ·</b> <a href="/w/index.php?title=JBIG2&action=edit&redlink=1" class="new" title="JBIG2 (la pagina non esiste)">JBIG2</a><b> ·</b> <a href="/w/index.php?title=Lossless_JPEG&action=edit&redlink=1" class="new" title="Lossless JPEG (la pagina non esiste)">lossless JPEG</a><b> ·</b> <a href="/wiki/Portable_Network_Graphics" title="Portable Network Graphics">PNG</a><b> ·</b> <a href="/w/index.php?title=Multiple_image_Network_Graphics&action=edit&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> ·</b> <a href="/wiki/FXG" title="FXG">FXG</a><b> ·</b> <a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">GIF</a><b> ·</b> <a href="/wiki/ICER" title="ICER">ICER</a><b> ·</b> <a href="/w/index.php?title=ILBM&action=edit&redlink=1" class="new" title="ILBM (la pagina non esiste)">ILBM</a><b> ·</b> <a href="/wiki/Truevision_TGA" title="Truevision TGA">TGA</a><b> ·</b> <a href="/wiki/Codec_JPDP" title="Codec JPDP">JPDP</a><b> ·</b> <a href="/wiki/JPEG_XR" title="JPEG XR">JPEG XR/HD Photo</a><b> ·</b> <a href="/wiki/Apple_Icon_Image" title="Apple Icon Image">ICNS</a><b> ·</b> <a href="/wiki/OpenEXR" title="OpenEXR">OpenEXR</a><b> ·</b> <a href="/wiki/OpenRaster" title="OpenRaster">OpenRaster</a><b> ·</b> <a href="/wiki/PCX" title="PCX">PCX</a><b> ·</b> <a href="/w/index.php?title=Progressive_Graphics_File&action=edit&redlink=1" class="new" title="Progressive Graphics File (la pagina non esiste)">PGF</a><b> ·</b> <a href="/wiki/PSD_(formato_di_file)" title="PSD (formato di file)">PSD</a><b> ·</b> <a href="/wiki/Tag_Image_File_Format" title="Tag Image File Format">TIFF</a><b> ·</b> <a href="/w/index.php?title=Wireless_Application_Protocol_Bitmap_Format&action=edit&redlink=1" class="new" title="Wireless Application Protocol Bitmap Format (la pagina non esiste)">WBMP</a><b> ·</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> ·</b> <a href="/wiki/Advanced_Systems_Format" title="Advanced Systems Format">ASF</a><b> ·</b> <a href="/wiki/Audio_Video_Interleave" title="Audio Video Interleave">AVI</a><b> ·</b> <a href="/wiki/Bink_Video" title="Bink Video">Bink</a><b> ·</b> <a href="/w/index.php?title=DivX_Media_Format&action=edit&redlink=1" class="new" title="DivX Media Format (la pagina non esiste)">DMF</a><b> ·</b> <a href="/wiki/Digital_Picture_Exchange" title="Digital Picture Exchange">DPX</a><b> ·</b> <a href="/wiki/Adobe_Flash" title="Adobe Flash">FLV</a><b> ·</b> <a href="/wiki/.m2ts" title=".m2ts">M2TS</a><b> ·</b> <a href="/wiki/Matroska" title="Matroska">Matroska</a><b> ·</b> <a href="/wiki/MOD_e_TOD" title="MOD e TOD">MOD</a><b> ·</b> <a href="/wiki/MPEG-4" title="MPEG-4">MP4</a><b> ·</b> <a href="/w/index.php?title=Media_Exchange_Format&action=edit&redlink=1" class="new" title="Media Exchange Format (la pagina non esiste)">MXF</a><b> ·</b> <a href="/w/index.php?title=NUT_(formato_di_file)&action=edit&redlink=1" class="new" title="NUT (formato di file) (la pagina non esiste)">NUT</a><b> ·</b> <a href="/wiki/Ogg" title="Ogg">Ogg</a><b> ·</b> <a href="/wiki/QuickTime_File_Format" title="QuickTime File Format">QuickTime</a><b> ·</b> <a href="/wiki/RealMedia" title="RealMedia">RealMedia</a><b> ·</b> <a href="/w/index.php?title=Smacker_video&action=edit&redlink=1" class="new" title="Smacker video (la pagina non esiste)">Smacker</a><b> ·</b> <a href="/w/index.php?title=Resource_Interchange_File_Format&action=edit&redlink=1" class="new" title="Resource Interchange File Format (la pagina non esiste)">RIFF</a><b> ·</b> <a href="/wiki/MOD_e_TOD" title="MOD e TOD">TOD</a><b> ·</b> <a href="/wiki/VOB" title="VOB">VOB</a><b> ·</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> ·</b> <a href="/wiki/Formato_file_.au" title="Formato file .au">AU</a><b> ·</b> <a href="/wiki/Waveform_Audio_File_Format" title="Waveform Audio File Format">WAV</a><b> ·</b> <a href="/wiki/Broadcast_Wave_Format" title="Broadcast Wave Format">BWF</a><b> ·</b> <a href="/wiki/RF64" title="RF64">RF64</a></td></tr></tbody></table></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r140554510">.mw-parser-output .CdA{border:1px solid #aaa;width:100%;margin:auto;font-size:90%;padding:2px}.mw-parser-output .CdA th{background-color:#f2f2f2;font-weight:bold;width:20%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .CdA th{background-color:#202122}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-os .mw-parser-output .CdA th{background-color:#202122}}</style><table class="CdA"><tbody><tr><th><a href="/wiki/Aiuto:Controllo_di_autorit%C3%A0" title="Aiuto:Controllo di autorità">Controllo di autorità</a></th><td><a href="/wiki/Library_of_Congress_Control_Number" title="Library of Congress Control Number">LCCN</a> <span class="uid">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://id.loc.gov/authorities/subjects/sh98006866">sh98006866</a></span><span style="font-weight:bold;"> ·</span> <a href="/wiki/Biblioteca_nazionale_di_Israele" title="Biblioteca nazionale di Israele">J9U</a> <span class="uid">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr>, <abbr title="ebraico">HE</abbr></span>) <a rel="nofollow" class="external text" href="https://www.nli.org.il/en/authorities/987007549347805171">987007549347805171</a></span></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=" " 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> <b><a href="/wiki/Portale:Informatica" title="Portale:Informatica">Portale Informatica</a></b>: accedi alle voci di Wikipedia che trattano di Informatica</div></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&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=H.263&oldid=132655365">https://it.wikipedia.org/w/index.php?title=H.263&oldid=132655365</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_video" title="Categoria:Codec video">Codec video</a></li><li><a href="/wiki/Categoria:Standard_ISO" title="Categoria:Standard ISO">Standard ISO</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:Voci_con_codice_LCCN" title="Categoria:Voci con codice LCCN">Voci con codice LCCN</a></li><li><a href="/wiki/Categoria:Voci_con_codice_J9U" title="Categoria:Voci con codice J9U">Voci con codice J9U</a></li><li><a href="/wiki/Categoria:Voci_non_biografiche_con_codici_di_controllo_di_autorit%C3%A0" title="Categoria:Voci non biografiche con codici di controllo di autorità">Voci non biografiche con codici di controllo di autorità</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 24 mar 2023 alle 09:37.</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=H.263&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://www.wikimedia.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" lang="en" 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'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'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">H.263</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>16 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="mw-portlet mw-portlet-dock-bottom emptyPortlet" id="p-dock-bottom"> <ul> </ul> </div> <script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.eqiad.main-757dc849df-dcxbw","wgBackendResponseTime":169,"wgPageParseReport":{"limitreport":{"cputime":"0.167","walltime":"0.428","ppvisitednodes":{"value":1554,"limit":1000000},"postexpandincludesize":{"value":44559,"limit":2097152},"templateargumentsize":{"value":285,"limit":2097152},"expansiondepth":{"value":9,"limit":100},"expensivefunctioncount":{"value":2,"limit":500},"unstrip-depth":{"value":0,"limit":20},"unstrip-size":{"value":4325,"limit":5000000},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 363.924 1 -total"," 49.33% 179.511 1 Template:Formati_di_compressione"," 37.72% 137.276 1 Template:Navbox"," 31.57% 114.907 4 Template:Cita_web"," 12.49% 45.452 1 Template:Controllo_di_autorità"," 6.42% 23.356 1 Template:Portale"," 4.86% 17.685 4 Template:Navbox_subgroup"," 2.94% 10.694 1 Template:Icona_argomento"," 0.76% 2.751 130 Template:,"]},"scribunto":{"limitreport-timeusage":{"value":"0.091","limit":"10.000"},"limitreport-memusage":{"value":2240759,"limit":52428800}},"cachereport":{"origin":"mw-web.eqiad.main-6cb6fc9546-v424g","timestamp":"20250312234902","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"H.263","url":"https:\/\/it.wikipedia.org\/wiki\/H.263","sameAs":"http:\/\/www.wikidata.org\/entity\/Q1063983","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q1063983","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":"2007-04-30T11:20:17Z","dateModified":"2023-03-24T08:37:55Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/9\/93\/Typical_H.323_Stack.png","headline":"codec video"}</script> </body> </html>