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id="toc-H.263v2_(H.263+)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-H.263v3_(H.263++)_and_Annex_X" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#H.263v3_(H.263++)_and_Annex_X"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>H.263v3 (H.263++) and Annex X</span> </div> </a> <ul id="toc-H.263v3_(H.263++)_and_Annex_X-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Patent_rights_and_open-source_implementation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Patent_rights_and_open-source_implementation"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Patent rights and open-source implementation</span> </div> </a> <ul id="toc-Patent_rights_and_open-source_implementation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main 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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="Go to an article in another language. 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class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/H.263" title="H.263 – Bulgarian" lang="bg" hreflang="bg" data-title="H.263" data-language-autonym="Български" data-language-local-name="Bulgarian" 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 – German" lang="de" hreflang="de" data-title="H.263" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/H.263" title="H.263 – Spanish" lang="es" hreflang="es" data-title="H.263" data-language-autonym="Español" data-language-local-name="Spanish" 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 – Persian" lang="fa" hreflang="fa" data-title="H.263" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/H.263" title="H.263 – French" lang="fr" hreflang="fr" data-title="H.263" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/H.263" title="H.263 – Korean" lang="ko" hreflang="ko" data-title="H.263" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/H.263" title="H.263 – Italian" lang="it" hreflang="it" data-title="H.263" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/H.263" title="H.263 – Japanese" lang="ja" hreflang="ja" data-title="H.263" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/H.263" title="H.263 – Polish" lang="pl" hreflang="pl" data-title="H.263" data-language-autonym="Polski" data-language-local-name="Polish" 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 – Romanian" lang="ro" hreflang="ro" data-title="H.263" data-language-autonym="Română" data-language-local-name="Romanian" 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 – Russian" lang="ru" hreflang="ru" data-title="H.263" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/H.263" title="H.263 – Finnish" lang="fi" hreflang="fi" data-title="H.263" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/H.263" title="H.263 – Ukrainian" lang="uk" hreflang="uk" data-title="H.263" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link 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class="noprint">From Wikipedia, the free encyclopedia</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="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Video compression method</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox hproduct"><caption class="infobox-title fn">H.263</caption><tbody><tr><td colspan="2" class="infobox-subheader">Video coding for low bit rate communication</td></tr><tr><th scope="row" class="infobox-label">Status</th><td class="infobox-data">In force</td></tr><tr><th scope="row" class="infobox-label">First published</th><td class="infobox-data">20 March 1996<span style="display:none"> (<span class="bday dtstart published updated itvstart">1996-03-20</span>)</span></td></tr><tr><th scope="row" class="infobox-label">Latest version</th><td class="infobox-data">3rd edition<br />24 June 2005<span style="display:none"> (<span class="bday dtstart published updated itvstart">2005-06-24</span>)</span></td></tr><tr><th scope="row" class="infobox-label">Organization</th><td class="infobox-data"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></td></tr><tr><th scope="row" class="infobox-label">Committee</th><td class="infobox-data"><a href="/wiki/VCEG" class="mw-redirect" title="VCEG">VCEG</a></td></tr><tr><th scope="row" class="infobox-label">Base standards</th><td class="infobox-data"><a href="/wiki/H.261" title="H.261">H.261</a>, <a href="/wiki/H.262" class="mw-redirect" title="H.262">H.262</a> (aka MPEG-2 Video)</td></tr><tr><th scope="row" class="infobox-label">Related standards</th><td class="infobox-data"><a href="/wiki/H.264" class="mw-redirect" title="H.264">H.264</a>, <a href="/wiki/H.265" class="mw-redirect" title="H.265">H.265</a>, <a href="/wiki/H.266" class="mw-redirect" title="H.266">H.266</a>, <a href="/wiki/H.323" title="H.323">H.323</a>, <a href="/wiki/H.324" title="H.324">H.324</a>, <a href="/wiki/ISO/IEC_14496-2" class="mw-redirect" title="ISO/IEC 14496-2">ISO/IEC 14496-2</a></td></tr><tr><th scope="row" class="infobox-label">Domain</th><td class="infobox-data"><a href="/wiki/Video_compression" class="mw-redirect" title="Video compression">Video compression</a></td></tr><tr><th scope="row" class="infobox-label">License</th><td class="infobox-data"><a href="/wiki/Reasonable_and_non-discriminatory_licensing" title="Reasonable and non-discriminatory licensing">RAND</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Website</th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://www.itu.int/rec/T-REC-H.263">www.itu.int/rec/T-REC-H.263</a></td></tr></tbody></table> <p><b>H.263</b> is a <a href="/w/index.php?title=Video_compression_method&action=edit&redlink=1" class="new" title="Video compression method (page does not exist)">video compression method</a> originally designed as a low-bit-rate compressed format for <a href="/wiki/Videotelephony" title="Videotelephony">videotelephony</a>. It was standardized by the <a href="/wiki/ITU-T" title="ITU-T">ITU-T</a> <a href="/wiki/Video_Coding_Experts_Group" title="Video Coding Experts Group">Video Coding Experts Group</a> (VCEG) in a project ending in 1995/1996. It is a member of the <a href="/wiki/H.26x" class="mw-redirect" title="H.26x">H.26x</a> family of video coding standards in the domain of the ITU-T. </p><p>Like the previous H.26x standards, H.263 is a block-based hybrid video coding scheme using 16×16 <a href="/wiki/Macroblock" title="Macroblock">macroblocks</a> of <a href="/wiki/YCbCr" title="YCbCr">YCbCr</a> color sample arrays, <a href="/wiki/Motion_compensation" title="Motion compensation">motion-compensated prediction</a>, an 8×8 <a href="/wiki/Discrete_cosine_transform" title="Discrete cosine transform">discrete cosine transform</a> for prediction differences, zig-zag scanning of transform coefficients, <a href="/wiki/Scalar_quantization" class="mw-redirect" title="Scalar quantization">scalar quantization</a>, <a href="/wiki/Run-length_coding" class="mw-redirect" title="Run-length coding">run-length transform coefficient symbols</a>, and <a href="/wiki/Variable-length_coding" class="mw-redirect" title="Variable-length coding">variable-length coding</a> (basically like <a href="/wiki/Huffman_coding" title="Huffman coding">Huffman coding</a> but with structured coding tables).<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The first (1995) version of H.263 included some optional features including <a href="/wiki/Overlapped_block_motion_compensation" class="mw-redirect" title="Overlapped block motion compensation">overlapped block motion compensation</a> and variable block-size motion compensation, and the spec was later extended to add various additional enhanced features in 1998 and 2000. Smaller additions were also made in 1997 and 2001, and a unified edition was produced in 2005. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History_and_background">History and background</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=1" title="Edit section: History and background"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The H.263 standard was first designed to be utilized in <a href="/wiki/H.324" title="H.324">H.324</a> based systems (<a href="/wiki/Public_Switched_Telephone_Network" class="mw-redirect" title="Public Switched Telephone Network">PSTN</a> and other <a href="/wiki/Circuit_switching" title="Circuit switching">circuit-switched</a> network <a href="/wiki/Videoconferencing" class="mw-redirect" title="Videoconferencing">videoconferencing</a> and <a href="/wiki/Videotelephony" title="Videotelephony">videotelephony</a>), but it also found use in <a href="/wiki/H.323" title="H.323">H.323</a> (<a href="/wiki/Real-time_Transport_Protocol" title="Real-time Transport Protocol">RTP</a>/IP-based videoconferencing), <a href="/wiki/H.320" title="H.320">H.320</a> (<a href="/wiki/Integrated_Services_Digital_Network" class="mw-redirect" title="Integrated Services Digital Network">ISDN</a>-based videoconferencing, where it became the most widely used video compression standard),<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> <a href="/wiki/RTSP" class="mw-redirect" title="RTSP">RTSP</a> (<a href="/wiki/Streaming_media" title="Streaming media">streaming media</a>) and <a href="/wiki/Session_Initiation_Protocol" title="Session Initiation Protocol">SIP</a> (IP-based videoconferencing) solutions. </p><p>H.263 is a required video coding format in <a href="/wiki/ETSI" class="mw-redirect" title="ETSI">ETSI</a> <a href="/wiki/3GPP" title="3GPP">3GPP</a> technical specifications for <a href="/wiki/IP_Multimedia_Subsystem" title="IP Multimedia Subsystem">IP Multimedia Subsystem</a> (IMS), <a href="/wiki/Multimedia_Messaging_Service" title="Multimedia Messaging Service">Multimedia Messaging Service</a> (MMS) and Transparent end-to-end Packet-switched Streaming Service (PSS).<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> In 3GPP specifications, H.263 video is usually used in <a href="/wiki/3GP" class="mw-redirect" title="3GP">3GP</a> <a href="/wiki/Container_format_(digital)" class="mw-redirect" title="Container format (digital)">container format</a>. </p><p>H.263 also found many applications on the internet: much <a href="/wiki/Flash_Video" title="Flash Video">Flash Video</a> content (as used on sites such as <a href="/wiki/YouTube" title="YouTube">YouTube</a>, <a href="/wiki/Google_Video" title="Google Video">Google Video</a>, and <a href="/wiki/MySpace" class="mw-redirect" title="MySpace">MySpace</a>) used to be encoded in <a href="/wiki/Sorenson_Spark#Sorenson_Spark" class="mw-redirect" title="Sorenson Spark">Sorenson Spark</a> format (an incomplete implementation of H.263<sup id="cite_ref-incomplete-h263_8-0" class="reference"><a href="#cite_note-incomplete-h263-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-almost_9-0" class="reference"><a href="#cite_note-almost-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup>). The original version of the <a href="/wiki/RealVideo" title="RealVideo">RealVideo</a> codec was based on H.263 until the release of RealVideo 8.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>H.263 was developed as an evolutionary improvement based on experience from <a href="/wiki/H.261" title="H.261">H.261</a> and <a href="/wiki/H.262" class="mw-redirect" title="H.262">H.262</a> (aka <a href="/wiki/MPEG-2_Video" class="mw-redirect" title="MPEG-2 Video">MPEG-2 Video</a>), the previous ITU-T standards for video compression, and the <a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a> standard developed in ISO/IEC. The first version of H.263 was completed in 1995 and provided a suitable replacement for <a href="/wiki/H.261" title="H.261">H.261</a> at all bit rates. It was further enhanced in projects known as H.263v2 (also known as H.263+ or H.263 1998) and H.263v3 (also known as H.263++ or H.263 2000). It was also used as the basis for the development of <a href="/wiki/MPEG-4_Part_2" title="MPEG-4 Part 2">MPEG-4 Part 2</a>.<sup id="cite_ref-end_of_the_ride_12-0" class="reference"><a href="#cite_note-end_of_the_ride-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-mpeg-4-video-faq_14-0" class="reference"><a href="#cite_note-mpeg-4-video-faq-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> MPEG-4 Part 2 is H.263 compatible in the sense that basic "baseline" H.263 bitstreams are correctly decoded by an MPEG-4 Video decoder.<sup id="cite_ref-end_of_the_ride_12-1" class="reference"><a href="#cite_note-end_of_the_ride-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-inside_MPEG-4_part_B_15-0" class="reference"><a href="#cite_note-inside_MPEG-4_part_B-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>The next enhanced format developed by ITU-T <a href="/wiki/VCEG" class="mw-redirect" title="VCEG">VCEG</a> (in partnership with <a href="/wiki/MPEG" class="mw-redirect" title="MPEG">MPEG</a>) after H.263 was the <a href="/wiki/H.264/MPEG-4_AVC" class="mw-redirect" title="H.264/MPEG-4 AVC">H.264</a> standard, also known as AVC and <a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4</a> part 10. As H.264 provides a significant improvement in capability beyond H.263, the H.263 standard is now considered a legacy design that is only used for compatibility with older products. Newer videoconferencing products now include H.264 as well as, or instead of, H.263 and <a href="/wiki/H.261" title="H.261">H.261</a> capabilities. Even newer standard formats, <a href="/wiki/HEVC" class="mw-redirect" title="HEVC">HEVC</a> and <a href="/wiki/Versatile_Video_Coding" title="Versatile Video Coding">VVC</a>, have also been developed by VCEG and MPEG, and have begun to replace H.264 in some applications. </p> <div class="mw-heading mw-heading2"><h2 id="Versions">Versions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=2" title="Edit section: Versions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Since the original ratification of H.263 in March 1996<sup id="cite_ref-itu-t-h263_16-0" class="reference"><a href="#cite_note-itu-t-h263-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> (approving a document that was produced in November 1995), there have been two subsequent additions which improved on the original standard by additional optional extensions (for example, the H.263v2 project added a <a href="/wiki/Deblocking_filter_(video)" class="mw-redirect" title="Deblocking filter (video)">deblocking filter</a> in its Annex J). </p> <div class="mw-heading mw-heading3"><h3 id="Version_1_and_Annex_I">Version 1 and Annex I</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=3" title="Edit section: Version 1 and Annex I"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The original version of H.263 specified the following annexes: </p> <ul><li>Annex A – Inverse transform accuracy specification</li> <li>Annex B – Hypothetical Reference Decoder</li> <li>Annex C – Considerations for Multipoint</li> <li>Annex D – Unrestricted Motion Vector mode</li> <li>Annex E – Syntax-based Arithmetic Coding mode</li> <li>Annex F – Advanced Prediction mode</li> <li>Annex G – PB-frames mode</li> <li>Annex H – Forward Error Correction for coded video signal</li></ul> <p>The first version of H.263 supported a limited set of picture sizes: </p> <ul><li>128×96 (a.k.a. Sub-QCIF)</li> <li>176×144 (a.k.a. QCIF)</li> <li>352×288 (a.k.a. <a href="/wiki/Common_Intermediate_Format" title="Common Intermediate Format">CIF</a>)</li> <li>704×576 (a.k.a. 4CIF)</li> <li>1408×1152 (a.k.a. 16CIF)</li></ul> <p>In March 1997, an informative Appendix I describing Error Tracking – an encoding technique for providing improved robustness to data losses and errors, was approved to provide information for the aid of implementers having an interest in such techniques. </p> <div class="mw-heading mw-heading3"><h3 id="H.263v2_(H.263+)"><span id="H.263v2_.28H.263.2B.29"></span>H.263v2 (H.263+)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=4" title="Edit section: H.263v2 (H.263+)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>H.263v2 (also known as <i>H.263+</i>, or as <i>the 1998 version of H.263</i>) is the informal name of the second edition of the ITU-T H.263 international video coding standard. It retained the entire technical content of the original version of the standard, but enhanced H.263 capabilities by adding several annexes which can substantially improve encoding efficiency and provide other capabilities (such as enhanced robustness against data loss in the transmission channel). The H.263+ project was ratified by the ITU in February 1998. It added the following Annexes: </p> <ul><li>Annex I – Advanced INTRA Coding mode</li> <li>Annex J – <a href="/wiki/Deblocking_filter_(video)" class="mw-redirect" title="Deblocking filter (video)">Deblocking Filter mode</a></li> <li>Annex K – Slice Structured mode</li> <li>Annex L – Supplemental Enhancement Information Specification</li> <li>Annex M – Improved PB-frames mode</li> <li>Annex N – Reference Picture Selection mode</li> <li>Annex O – 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>H.263v2 also added support for flexible customized picture formats and custom picture clock frequencies. As noted above, the only picture formats previously supported in H.263 had been Sub-QCIF, QCIF, <a href="/wiki/Common_Intermediate_Format" title="Common Intermediate Format">CIF</a>, 4CIF, and 16CIF, and the only picture clock frequency had been 30000/1001 (approximately 29.97) clock ticks per second. </p><p>H.263v2 specified a set of recommended modes in an informative appendix (Appendix II, since deprecated): </p> <table class="wikitable" style="font-size: 100%; text-align: center;"> <tbody><tr> <th> </th> <th>Level 1 </th> <th>Level 2 </th> <th>Level 3 </th></tr> <tr> <th>Advanced INTRA Coding </th> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Deblocking Filter </th> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Supplemental Enhancement Information (Full-Frame Freeze Only) </th> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Modified Quantization </th> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Unrestricted Motion Vectors </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Slice Structured Mode </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Reference Picture Resampling (Implicit Factor-of-4 Mode Only) </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Advanced Prediction </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Improved PB-frames </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Independent Segment Decoding </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th>Alternate INTER VLC </th> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <th> </th> <th>Level 1 </th> <th>Level 2 </th> <th>Level 3 </th></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="H.263v3_(H.263++)_and_Annex_X"><span id="H.263v3_.28H.263.2B.2B.29_and_Annex_X"></span>H.263v3 (H.263++) and Annex X</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=5" title="Edit section: H.263v3 (H.263++) and Annex X"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The definition of H.263v3 (also known as H.263++ or as the 2000 version of H.263) added three annexes. These annexes and an additional annex that specified profiles (approved the following year) were originally published as separate documents from the main body of the standard itself. The additional annexes specified are: </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 (originally specified in 2001) – Profiles and levels definition</li></ul> <p>The prior informative Appendix II (recommended optional enhancement) was obsoleted by the creation of the normative Annex X. </p><p>In June 2001, another informative appendix (Appendix III, Examples for H.263 encoder/decoder implementations) was approved. It describes techniques for encoding and for error/loss concealment by decoders. </p><p>In January 2005, a unified H.263 specification document was produced (with the exception of Appendix III, which remains as a separately-published document). </p><p>In August 2005, an implementors' guide was approved to correct a small error in the seldom-used Annex Q reduced-resolution update mode. </p> <div class="mw-heading mw-heading2"><h2 id="Patent_rights_and_open-source_implementation">Patent rights and open-source implementation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=6" title="Edit section: Patent rights and open-source implementation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>H.263 was developed under the "<a href="/wiki/Reasonable_and_non-discriminatory" class="mw-redirect" title="Reasonable and non-discriminatory">reasonable and non-discriminatory</a>" patent licensing policy of ITU-T, although in practice, the licensing for patent rights on the standard did not become the subject of substantial litigation. Due to the age of the standard, most or all relevant patents would currently be expired –  at least for patents that would apply to the early versions of the standard.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2022)">citation needed</span></a></i>]</sup> </p><p>Open-source implementations include the <a href="/wiki/LGPL" class="mw-redirect" title="LGPL">LGPL</a>-licensed <a href="/wiki/Libavcodec" title="Libavcodec">libavcodec</a> library (part of the <a href="/wiki/FFmpeg" title="FFmpeg">FFmpeg</a> project) which is used by programs such as <a href="/wiki/Ffdshow" title="Ffdshow">ffdshow</a>, <a href="/wiki/VLC_media_player" title="VLC media player">VLC media player</a> and <a href="/wiki/MPlayer" title="MPlayer">MPlayer</a>.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=7" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/H.262/MPEG-2_Part_2" title="H.262/MPEG-2 Part 2">H.262/MPEG-2 Part 2</a></li> <li><a href="/wiki/MPEG-4_Part_2" title="MPEG-4 Part 2">MPEG-4 Part 2</a> (MPEG-4 Visual)</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=8" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.itu.int/ITU-T/recommendations/related_ps.aspx?id_prod=4242">"ITU-T Rec. H.263 declared patent(s)"</a>. <i>ITU</i>. International Telecommunication Union. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220511134731/https://www.itu.int/ITU-T/recommendations/related_ps.aspx?id_prod=4242">Archived</a> from the original on 11 May 2022<span class="reference-accessdate">. Retrieved <span class="nowrap">11 May</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ITU&rft.atitle=ITU-T+Rec.+H.263+declared+patent%28s%29&rft_id=https%3A%2F%2Fwww.itu.int%2FITU-T%2Frecommendations%2Frelated_ps.aspx%3Fid_prod%3D4242&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Video_codecs">"Web video codec guide"</a>. <i>MDN Web Docs</i>. Mozilla Foundation. H.263. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220503075453/https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Video_codecs">Archived</a> from the original on 3 May 2022<span class="reference-accessdate">. Retrieved <span class="nowrap">11 May</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=MDN+Web+Docs&rft.atitle=Web+video+codec+guide&rft.pages=H.263&rft_id=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FMedia%2FFormats%2FVideo_codecs&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFDavis1997" class="citation news cs1">Davis, Andrew (13 June 1997). <a rel="nofollow" class="external text" href="https://www.eetimes.com/document.asp?doc_id=1275886">"The H.320 Recommendation Overview"</a>. <i><a href="/wiki/EE_Times" title="EE Times">EE Times</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">7 November</span> 2019</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=EE+Times&rft.atitle=The+H.320+Recommendation+Overview&rft.date=1997-06-13&rft.aulast=Davis&rft.aufirst=Andrew&rft_id=https%3A%2F%2Fwww.eetimes.com%2Fdocument.asp%3Fdoc_id%3D1275886&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=8vhEAQAAIAAJ"><i>IEEE WESCANEX 97: communications, power, and computing : conference proceedings</i></a>. University of Manitoba, Winnipeg, Manitoba, Canada: <a href="/wiki/Institute_of_Electrical_and_Electronics_Engineers" title="Institute of Electrical and Electronics Engineers">Institute of Electrical and Electronics Engineers</a>. May 22–23, 1997. p. 30. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9780780341470" title="Special:BookSources/9780780341470"><bdi>9780780341470</bdi></a>. <q>H.263 is similar to, but more complex than H.261. It is currently the most widely used international video compression standard for video telephony on ISDN (Integrated Services Digital Network) telephone lines.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=IEEE+WESCANEX+97%3A+communications%2C+power%2C+and+computing+%3A+conference+proceedings&rft.place=University+of+Manitoba%2C+Winnipeg%2C+Manitoba%2C+Canada&rft.pages=30&rft.pub=Institute+of+Electrical+and+Electronics+Engineers&rft.date=1997-05-22%2F1997-05-23&rft.isbn=9780780341470&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D8vhEAQAAIAAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">ETSI (2009-04) <a rel="nofollow" class="external text" href="http://www.3gpp.org/ftp/Specs/html-info/26234.htm">ETSI TS 126 234 V8.2.0 (2009-04); 3GPP TS 26.234; Transparent end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs</a> Retrieved on 2009-06-02.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text">ETSI (2009-01) <a rel="nofollow" class="external text" href="http://www.3gpp.org/ftp/Specs/html-info/26140.htm">ETSI TS 126 140 V8.0.0 (2009-01); 3GPP TS 26.140; Multimedia Messaging Service (MMS); Media formats and codes</a> Retrieved on 2009-06-02.</span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text">ETSI (2009-01) <a rel="nofollow" class="external text" href="http://www.3gpp.org/ftp/Specs/html-info/26141.htm">ETSI TS 126 141 V8.0.0 (2009-01); 3GPP TS 26.141; IP Multimedia System (IMS) Messaging and Presence; Media formats and codecs</a> Retrieved on 2009-06-02.</span> </li> <li id="cite_note-incomplete-h263-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-incomplete-h263_8-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKaourantin.net2005" class="citation web cs1">Kaourantin.net (2005-08-13). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090206142709/http://kaourantin.net/2005/08/quest-for-new-video-codec-in-flash-8.html">"The quest for a new video codec in Flash 8"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.kaourantin.net/2005/08/quest-for-new-video-codec-in-flash-8.html">the original</a> on 2009-02-06<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-08-10</span></span>. <q>We went this route before with Sorenson Spark which is an incomplete implementation of H.263 and it bit us badly when trying to implement certain solutions.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+quest+for+a+new+video+codec+in+Flash+8&rft.date=2005-08-13&rft.au=Kaourantin.net&rft_id=http%3A%2F%2Fwww.kaourantin.net%2F2005%2F08%2Fquest-for-new-video-codec-in-flash-8.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-almost-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-almost_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBenjamin_Larsson2009" class="citation mailinglist cs1">Benjamin Larsson (2009-03-17). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090817080612/http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-March/065410.html">"h263-svq3 optimizations"</a>. <i>FFmpeg-devel</i> (Mailing list). Archived from <a rel="nofollow" class="external text" href="http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-March/065410.html">the original</a> on 2009-08-17<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-08-09</span></span>. <q>Sorenson _Spark_ and H.263 are actually very similar. They differ mostly in header structure and ranges of the coefficients.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=h263-svq3+optimizations&rft.date=2009-03-17&rft.au=Benjamin+Larsson&rft_id=http%3A%2F%2Flists.mplayerhq.hu%2Fpipermail%2Fffmpeg-devel%2F2009-March%2F065410.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://wiki.multimedia.cx/index.php?title=Sorenson_Spark">"Sorenson Spark"</a>. MultimediaWiki<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-11-03</span></span>. <q>Video codec used in Flash Video files, based on H.263.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Sorenson+Spark&rft.pub=MultimediaWiki&rft_id=http%3A%2F%2Fwiki.multimedia.cx%2Findex.php%3Ftitle%3DSorenson_Spark&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMultimediaWiki" class="citation web cs1">MultimediaWiki. <a rel="nofollow" class="external text" href="http://wiki.multimedia.cx/index.php?title=RealVideo_G2">"RealVideo G2"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2009-11-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=RealVideo+G2&rft.au=MultimediaWiki&rft_id=http%3A%2F%2Fwiki.multimedia.cx%2Findex.php%3Ftitle%3DRealVideo_G2&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-end_of_the_ride-12"><span class="mw-cite-backlink">^ <a href="#cite_ref-end_of_the_ride_12-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-end_of_the_ride_12-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFchiariglione.org2006" class="citation web cs1">chiariglione.org (2006-08-10). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110122013232/http://ride.chiariglione.org/end_of_the_ride_qm.htm">"Riding the Media Bits, End of the Ride?"</a>. Archived from <a rel="nofollow" class="external text" href="http://ride.chiariglione.org/end_of_the_ride_qm.htm">the original</a> on 2011-01-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-03-10</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Riding+the+Media+Bits%2C+End+of+the+Ride%3F&rft.date=2006-08-10&rft.au=chiariglione.org&rft_id=http%3A%2F%2Fride.chiariglione.org%2Fend_of_the_ride_qm.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFernando_Pereira" class="citation web cs1">Fernando Pereira. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20111018071929/http://mpeg.chiariglione.org/tutorials/papers/icj-mpeg4-si/02-overview_paper/2-overview_paper.htm">"MPEG-4: Why, What, How and When?"</a>. chiariglione.org. Archived from <a rel="nofollow" class="external text" href="http://mpeg.chiariglione.org/tutorials/papers/icj-mpeg4-si/02-overview_paper/2-overview_paper.htm">the original</a> on 2011-10-18<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-03-10</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=MPEG-4%3A+Why%2C+What%2C+How+and+When%3F&rft.pub=chiariglione.org&rft.au=Fernando+Pereira&rft_id=http%3A%2F%2Fmpeg.chiariglione.org%2Ftutorials%2Fpapers%2Ficj-mpeg4-si%2F02-overview_paper%2F2-overview_paper.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-mpeg-4-video-faq-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-mpeg-4-video-faq_14-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFISO/IEC_JTC1/SC29/WG112000" class="citation web cs1">ISO/IEC JTC1/SC29/WG11 (March 2000). <a rel="nofollow" class="external text" href="http://mpeg.chiariglione.org/faq/mp4-vid/mp4-vid.htm">"MPEG-4 Video - Frequently Asked Questions"</a>. chiariglione.org<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-03-10</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=MPEG-4+Video+-+Frequently+Asked+Questions&rft.pub=chiariglione.org&rft.date=2000-03&rft.au=ISO%2FIEC+JTC1%2FSC29%2FWG11&rft_id=http%3A%2F%2Fmpeg.chiariglione.org%2Ffaq%2Fmp4-vid%2Fmp4-vid.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span><span class="cs1-maint citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_web" title="Template:Cite web">cite web</a>}}</code>: CS1 maint: numeric names: authors list (<a href="/wiki/Category:CS1_maint:_numeric_names:_authors_list" title="Category:CS1 maint: numeric names: authors list">link</a>)</span></span> </li> <li id="cite_note-inside_MPEG-4_part_B-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-inside_MPEG-4_part_B_15-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFchiariglione.org2003" class="citation web cs1">chiariglione.org (2003-10-25). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110122013103/http://ride.chiariglione.org/inside_MPEG-4_part_B/inside_MPEG-4_part_B.htm">"Riding the Media Bits, Inside MPEG-4 - Part B"</a>. Archived from <a rel="nofollow" class="external text" href="http://ride.chiariglione.org/inside_MPEG-4_part_B/inside_MPEG-4_part_B.htm">the original</a> on 2011-01-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-03-10</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Riding+the+Media+Bits%2C+Inside+MPEG-4+-+Part+B&rft.date=2003-10-25&rft.au=chiariglione.org&rft_id=http%3A%2F%2Fride.chiariglione.org%2Finside_MPEG-4_part_B%2Finside_MPEG-4_part_B.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-itu-t-h263-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-itu-t-h263_16-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFITU-T" class="citation web cs1">ITU-T. <a rel="nofollow" class="external text" href="http://www.itu.int/rec/T-REC-H.263/">"H.263 : Video coding for low bit rate communication"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2009-11-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=H.263+%3A+Video+coding+for+low+bit+rate+communication&rft.au=ITU-T&rft_id=http%3A%2F%2Fwww.itu.int%2Frec%2FT-REC-H.263%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-enc-libavcodec.html">"7.3. Encoding with the libavcodec codec family"</a>. <i>www.mplayerhq.hu</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2021-05-08</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.mplayerhq.hu&rft.atitle=7.3.+Encoding+with+the+libavcodec+codec+family&rft_id=http%3A%2F%2Fwww.mplayerhq.hu%2FDOCS%2FHTML%2Fen%2Fmenc-feat-enc-libavcodec.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AH.263" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=H.263&action=edit&section=9" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.itu.int/rec/T-REC-H.263/">The ITU-T specification for H.263</a></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20011030094328/http://www.ietf.org/html.charters/avt-charter.html">IETF AVT Working Group</a> - Group that reviews codec packetizations for <a href="/wiki/Real-time_Transport_Protocol" title="Real-time Transport Protocol">RTP</a> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222">RFC <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc4629">4629</a> - RTP Payload Format for ITU-T Rec. H.263 Video</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222">RFC <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc2429">2429</a> - RTP Payload Format for the 1998 Version of ITU-T Rec. H.263 Video (H.263+) (Obsolete, upgraded spec in RFC 4629)</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222">RFC <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc2190">2190</a> - RTP Payload Format for H.263 Video Streams (Historic)</li></ul></li> <li><a rel="nofollow" class="external text" href="http://wiki.multimedia.cx/index.php?title=H.263">H.263 - MultimediaWiki</a></li> <li><a rel="nofollow" class="external text" href="http://www.intel.com/cd/software/products/asmo-na/eng/perflib/ipp/302910.htm">Intel Integrated Performance Primitives</a></li> <li><a rel="nofollow" class="external text" href="http://www4.informatik.uni-erlangen.de/Projects/ScalVico/vic/">H.263 implementation in vic (source code available)</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist 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.navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Compression_formats" title="Template:Compression formats"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Compression_formats" title="Template talk:Compression formats"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Compression_formats" title="Special:EditPage/Template:Compression formats"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Multimedia_compression_and_container_formats462" style="font-size:114%;margin:0 4em"><a href="/wiki/Multimedia" title="Multimedia">Multimedia</a> <a href="/wiki/Data_compression" title="Data compression">compression</a> and <a href="/wiki/Container_format_(computing)" class="mw-redirect" title="Container format (computing)">container</a> formats</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Video_coding_format" title="Video coding format">Video<br />compression</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a>, <br /><a href="/wiki/Moving_Picture_Experts_Group" title="Moving Picture Experts Group">MPEG</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/DV_(video_format)" title="DV (video format)">DV</a></li> <li><a href="/wiki/Motion_JPEG" title="Motion JPEG">MJPEG</a></li> <li><a href="/wiki/Motion_JPEG_2000" title="Motion JPEG 2000">Motion JPEG 2000</a></li> <li><a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a></li> <li><a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a> <ul><li><a href="/wiki/H.262/MPEG-2_Part_2" title="H.262/MPEG-2 Part 2">Part 2</a></li></ul></li> <li><a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4</a> <ul><li><a href="/wiki/MPEG-4_Part_2" title="MPEG-4 Part 2">Part 2 / ASP</a></li> <li><a href="/wiki/H.264/MPEG-4_AVC" class="mw-redirect" title="H.264/MPEG-4 AVC">Part 10 / AVC</a></li> <li><a href="/wiki/MPEG-4_IVC" class="mw-redirect" title="MPEG-4 IVC">Part 33 / IVC</a></li></ul></li> <li><a href="/wiki/MPEG-H" title="MPEG-H">MPEG-H</a> <ul><li><a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">Part 2 / HEVC</a></li></ul></li> <li><a href="/w/index.php?title=MPEG-I&action=edit&redlink=1" class="new" title="MPEG-I (page does not exist)">MPEG-I</a> <ul><li><a href="/wiki/Versatile_Video_Coding" title="Versatile Video Coding">Part 3 / VVC</a></li></ul></li> <li><a href="/wiki/MPEG-5" class="mw-redirect" title="MPEG-5">MPEG-5</a> <ul><li><a href="/wiki/Essential_Video_Coding" title="Essential Video Coding">Part 1 / EVC</a></li> <li><a href="/wiki/LCEVC" title="LCEVC">Part 2 / LCEVC</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a>, <a href="/wiki/Video_Coding_Experts_Group" title="Video Coding Experts Group">VCEG</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/H.120" title="H.120">H.120</a></li> <li><a href="/wiki/H.261" title="H.261">H.261</a></li> <li><a href="/wiki/H.262/MPEG-2_Part_2" title="H.262/MPEG-2 Part 2">H.262</a></li> <li><a class="mw-selflink selflink">H.263</a></li> <li><a href="/wiki/Advanced_Video_Coding" title="Advanced Video Coding">H.264 / AVC</a></li> <li><a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">H.265 / HEVC</a></li> <li><a href="/wiki/Versatile_Video_Coding" title="Versatile Video Coding">H.266 / VVC</a></li> <li><a href="/w/index.php?title=H.267&action=edit&redlink=1" class="new" title="H.267 (page does not exist)">H.267 / Enhanced Coding Model</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/Society_of_Motion_Picture_and_Television_Engineers" title="Society of Motion Picture and Television Engineers">SMPTE</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/VC-1" title="VC-1">VC-1</a></li> <li><a href="/wiki/Dirac_(video_compression_format)" title="Dirac (video compression format)">VC-2</a></li> <li><a href="/wiki/Avid_DNxHD" title="Avid DNxHD">VC-3</a></li> <li><a href="/wiki/CineForm" title="CineForm">VC-5</a></li> <li><a href="/wiki/VC-6" title="VC-6">VC-6</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/On2_Technologies" title="On2 Technologies">TrueMotion</a> and AOMedia</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/On2_Technologies#TrueMotion_S" title="On2 Technologies">TrueMotion S</a></li> <li><a href="/wiki/VP3" title="VP3">VP3</a></li> <li><a href="/wiki/VP6" title="VP6">VP6</a></li> <li><a href="/wiki/VP7" class="mw-redirect" title="VP7">VP7</a></li> <li><a href="/wiki/VP8" title="VP8">VP8</a></li> <li><a href="/wiki/VP9" title="VP9">VP9</a></li> <li><a href="/wiki/AV1" title="AV1">AV1</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Chinese Standard</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Audio_Video_Standard#First_generation" title="Audio Video Standard">AVS1 P2/AVS+</a>(GB/T 20090.2/16)</li> <li><a href="/wiki/Audio_Video_Standard#Second_generation" title="Audio Video Standard">AVS2 P2</a>(GB/T 33475.2,GY/T 299.1) <ul><li>HDR Vivid(GY/T 358)</li></ul></li> <li>AVS3 P2(GY/T 368)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apple_Video" title="Apple Video">Apple Video</a></li> <li><a href="/wiki/Audio_Video_Standard" title="Audio Video Standard">AVS</a></li> <li><a href="/wiki/Bink_Video" title="Bink Video">Bink</a></li> <li><a href="/wiki/Cinepak" title="Cinepak">Cinepak</a></li> <li><a href="/wiki/Daala" title="Daala">Daala</a></li> <li><a href="/wiki/Digital_Video_Interactive" title="Digital Video Interactive">DVI</a></li> <li><a href="/wiki/FFV1" title="FFV1">FFV1</a></li> <li><a href="/wiki/Huffyuv" title="Huffyuv">Huffyuv</a></li> <li><a href="/wiki/Indeo" title="Indeo">Indeo</a></li> <li><a href="/wiki/Lagarith" title="Lagarith">Lagarith</a></li> <li><a href="/wiki/Microsoft_Video_1" title="Microsoft Video 1">Microsoft Video 1</a></li> <li><a href="/wiki/MSU_Lossless_Video_Codec" title="MSU Lossless Video Codec">MSU Lossless</a></li> <li><a href="/wiki/OMS_Video" title="OMS Video">OMS Video</a></li> <li><a href="/wiki/Pixlet" title="Pixlet">Pixlet</a></li> <li><a href="/wiki/Apple_ProRes" title="Apple ProRes">ProRes</a> <ul><li><a href="/wiki/ProRes_422" class="mw-redirect" title="ProRes 422">422</a></li> <li><a href="/wiki/ProRes_4444" class="mw-redirect" title="ProRes 4444">4444</a></li></ul></li> <li>QuickTime <ul><li><a href="/wiki/QuickTime_Animation" title="QuickTime Animation">Animation</a></li> <li><a href="/wiki/QuickTime_Graphics" title="QuickTime Graphics">Graphics</a></li></ul></li> <li><a href="/wiki/RealVideo" title="RealVideo">RealVideo</a></li> <li><a href="/wiki/RTVideo" title="RTVideo">RTVideo</a></li> <li><a href="/wiki/SheerVideo" title="SheerVideo">SheerVideo</a></li> <li><a href="/wiki/Smacker_video" title="Smacker video">Smacker</a></li> <li><a href="/wiki/Sorenson_Media" title="Sorenson Media">Sorenson Video/Spark</a></li> <li><a href="/wiki/Theora" title="Theora">Theora</a></li> <li><a href="/wiki/Thor_(video_codec)" title="Thor (video codec)">Thor</a></li> <li><a href="/wiki/Ut_Video_Codec_Suite" title="Ut Video Codec Suite">Ut</a></li> <li><a href="/wiki/Windows_Media_Video" title="Windows Media Video">WMV</a></li> <li><a href="/wiki/RatDVD" title="RatDVD">XEB</a></li> <li><a href="/wiki/YULS" title="YULS">YULS</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Audio_coding_format" title="Audio coding format">Audio<br />compression</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a>,<br /> <a href="/wiki/Moving_Picture_Experts_Group" title="Moving Picture Experts Group">MPEG</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II">MPEG-1 Layer II</a> <ul><li><a href="/wiki/MPEG_Multichannel" title="MPEG Multichannel">Multichannel</a></li></ul></li> <li><a href="/wiki/MPEG-1_Audio_Layer_I" title="MPEG-1 Audio Layer I">MPEG-1 Layer I</a></li> <li><a href="/wiki/MP3" title="MP3">MPEG-1 Layer III (MP3)</a></li> <li><a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a> <ul><li><a href="/wiki/High-Efficiency_Advanced_Audio_Coding" title="High-Efficiency Advanced Audio Coding">HE-AAC</a></li> <li><a href="/wiki/AAC-LD" title="AAC-LD">AAC-LD</a></li></ul></li> <li><a href="/wiki/MPEG_Surround" title="MPEG Surround">MPEG Surround</a></li> <li><a href="/wiki/Audio_Lossless_Coding" title="Audio Lossless Coding">MPEG-4 ALS</a></li> <li><a href="/wiki/MPEG-4_SLS" title="MPEG-4 SLS">MPEG-4 SLS</a></li> <li><a href="/wiki/Super_Audio_CD#DST" title="Super Audio CD">MPEG-4 DST</a></li> <li><a href="/wiki/Harmonic_Vector_Excitation_Coding" title="Harmonic Vector Excitation Coding">MPEG-4 HVXC</a></li> <li><a href="/wiki/Code-excited_linear_prediction" title="Code-excited linear prediction">MPEG-4 CELP</a></li> <li><a href="/wiki/Unified_Speech_and_Audio_Coding" title="Unified Speech and Audio Coding">MPEG-D USAC</a></li> <li><a href="/wiki/MPEG-H_3D_Audio" title="MPEG-H 3D Audio">MPEG-H 3D Audio</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/G.711" title="G.711">G.711</a> <ul><li><a href="/wiki/A-law_algorithm" title="A-law algorithm">A-law</a></li> <li><a href="/wiki/%CE%9C-law_algorithm" title="Μ-law algorithm">µ-law</a></li></ul></li> <li><a href="/wiki/G.718" title="G.718">G.718</a></li> <li><a href="/wiki/G.719" title="G.719">G.719</a></li> <li><a href="/wiki/G.722" title="G.722">G.722</a></li> <li><a href="/wiki/G.722.1" title="G.722.1">G.722.1</a></li> <li><a href="/wiki/Adaptive_Multi-Rate_Wideband" title="Adaptive Multi-Rate Wideband">G.722.2</a></li> <li><a href="/wiki/G.723" title="G.723">G.723</a></li> <li><a href="/wiki/G.723.1" title="G.723.1">G.723.1</a></li> <li><a href="/wiki/G.726" title="G.726">G.726</a></li> <li><a href="/wiki/G.728" title="G.728">G.728</a></li> <li><a href="/wiki/G.729" title="G.729">G.729</a></li> <li><a href="/wiki/G.729.1" title="G.729.1">G.729.1</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Opus_(audio_format)" title="Opus (audio format)">Opus</a></li> <li><a href="/wiki/Internet_Low_Bitrate_Codec" title="Internet Low Bitrate Codec">iLBC</a></li> <li><a href="/wiki/Speex" title="Speex">Speex</a></li> <li><a href="/wiki/Vorbis" title="Vorbis">Vorbis</a></li> <li><a href="/wiki/FLAC" title="FLAC">FLAC</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/3GPP" title="3GPP">3GPP</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Adaptive_Multi-Rate_audio_codec" title="Adaptive Multi-Rate audio codec">AMR</a></li> <li><a href="/wiki/Adaptive_Multi-Rate_Wideband" title="Adaptive Multi-Rate Wideband">AMR-WB</a></li> <li><a href="/wiki/Extended_Adaptive_Multi-Rate_%E2%80%93_Wideband" title="Extended Adaptive Multi-Rate – Wideband">AMR-WB+</a></li> <li><a href="/wiki/Enhanced_Variable_Rate_Codec" title="Enhanced Variable Rate Codec">EVRC</a></li> <li><a href="/wiki/Enhanced_Variable_Rate_Codec_B" title="Enhanced Variable Rate Codec B">EVRC-B</a></li> <li><a href="/wiki/Enhanced_Voice_Services" title="Enhanced Voice Services">EVS</a></li> <li><a href="/wiki/Half_Rate" title="Half Rate">GSM-HR</a></li> <li><a href="/wiki/Full_Rate" title="Full Rate">GSM-FR</a></li> <li><a href="/wiki/Enhanced_full_rate" title="Enhanced full rate">GSM-EFR</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/ETSI" class="mw-redirect" title="ETSI">ETSI</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dolby_Digital" title="Dolby Digital">AC-3</a></li> <li><a href="/wiki/Dolby_AC-4" title="Dolby AC-4">AC-4</a></li> <li><a href="/wiki/DTS_(sound_system)" class="mw-redirect" title="DTS (sound system)">DTS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/Bluetooth_Special_Interest_Group" title="Bluetooth Special Interest Group">Bluetooth SIG</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SBC_(codec)" title="SBC (codec)">SBC</a></li> <li><a href="/wiki/LC3_(codec)" title="LC3 (codec)">LC3</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Chinese Standard</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Audio_Video_Standard#First_generation" title="Audio Video Standard">AVS1 P10</a>(GB/T 20090.10)</li> <li><a href="/wiki/Audio_Video_Standard#Second_generation" title="Audio Video Standard">AVS2 P3</a>(GB/T 33475.3) <ul><li><a href="/w/index.php?title=Audio_Vivid&action=edit&redlink=1" class="new" title="Audio Vivid (page does not exist)">Audio Vivid</a>(GY/T 363)</li></ul></li> <li><a href="/wiki/Dynamic_Resolution_Adaptation" title="Dynamic Resolution Adaptation">DRA</a>(GB/T 22726)</li> <li>ExAC(SJ/T 11299.4)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Algebraic_code-excited_linear_prediction" title="Algebraic code-excited linear prediction">ACELP</a></li> <li><a href="/wiki/Apple_Lossless_Audio_Codec" title="Apple Lossless Audio Codec">ALAC</a></li> <li><a href="/wiki/Asao_(codec)" title="Asao (codec)">Asao</a></li> <li><a href="/wiki/Adaptive_Transform_Acoustic_Coding" class="mw-redirect" title="Adaptive Transform Acoustic Coding">ATRAC</a></li> <li><a href="/wiki/CELT" title="CELT">CELT</a></li> <li><a href="/wiki/Codec_2" title="Codec 2">Codec 2</a></li> <li><a href="/wiki/Internet_Speech_Audio_Codec" title="Internet Speech Audio Codec">iSAC</a></li> <li><a href="/wiki/Lyra_(codec)" title="Lyra (codec)">Lyra</a></li> <li><a href="/wiki/Mixed-excitation_linear_prediction" title="Mixed-excitation linear prediction">MELP</a></li> <li><a href="/wiki/Monkey%27s_Audio" title="Monkey's Audio">Monkey's Audio</a></li> <li><a href="/wiki/MT9" title="MT9">MT9</a></li> <li><a href="/wiki/Musepack" title="Musepack">Musepack</a></li> <li><a href="/wiki/OptimFROG" title="OptimFROG">OptimFROG</a></li> <li><a href="/wiki/Original_Sound_Quality" title="Original Sound Quality">OSQ</a></li> <li><a href="/wiki/Qualcomm_code-excited_linear_prediction" title="Qualcomm code-excited linear prediction">QCELP</a></li> <li><a href="/wiki/Relaxed_code-excited_linear_prediction" title="Relaxed code-excited linear prediction">RCELP</a></li> <li><a href="/wiki/RealAudio" title="RealAudio">RealAudio</a></li> <li><a href="/wiki/RTAudio" title="RTAudio">RTAudio</a></li> <li><a href="/wiki/Avid_Audio#Sound_Designer_file_formats" title="Avid Audio">SD2</a></li> <li><a href="/wiki/Shorten_file_format" class="mw-redirect" title="Shorten file format">SHN</a></li> <li><a href="/wiki/SILK" title="SILK">SILK</a></li> <li><a href="/wiki/Siren_(codec)" title="Siren (codec)">Siren</a></li> <li><a href="/wiki/Selectable_Mode_Vocoder" title="Selectable Mode Vocoder">SMV</a></li> <li><a href="/wiki/SVOPC" title="SVOPC">SVOPC</a></li> <li>TTA <ul><li>True Audio</li></ul></li> <li><a href="/wiki/TwinVQ" title="TwinVQ">TwinVQ</a></li> <li><a href="/wiki/Variable-Rate_Multimode_Wideband" title="Variable-Rate Multimode Wideband">VMR-WB</a></li> <li><a href="/wiki/Vector_sum_excited_linear_prediction" title="Vector sum excited linear prediction">VSELP</a></li> <li><a href="/wiki/WavPack" title="WavPack">WavPack</a></li> <li><a href="/wiki/Windows_Media_Audio" title="Windows Media Audio">WMA</a></li> <li><a href="/wiki/Master_Quality_Authenticated" title="Master Quality Authenticated">MQA</a></li> <li><a href="/wiki/AptX" title="AptX">aptX</a></li> <li><a href="/wiki/AptX#aptX_HD" title="AptX">aptX HD</a></li> <li><a href="/wiki/AptX#aptX_Low_Latency" title="AptX">aptX Low Latency</a></li> <li><a href="/wiki/AptX#aptX_Adaptive" title="AptX">aptX Adaptive</a></li> <li><a href="/wiki/LDAC_(codec)" title="LDAC (codec)">LDAC</a></li> <li><a href="/wiki/LHDC_(codec)" title="LHDC (codec)">LHDC</a></li> <li><a href="/wiki/LHDC_(codec)#LLAC" title="LHDC (codec)">LLAC</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Image_compression" title="Image compression">Image<br />compression</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a>, <a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a>, <br /><a href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">W3C</a>, <a href="/wiki/ITU-T" title="ITU-T">ITU-T</a>, <a href="/wiki/Joint_Photographic_Experts_Group" title="Joint Photographic Experts Group">JPEG</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Group_4_compression" title="Group 4 compression">CCITT Group 4</a></li> <li><a href="/wiki/GIF" title="GIF">GIF</a></li> <li><a href="/wiki/High_Efficiency_Image_File_Format#HEIC:_HEVC_in_HEIF" title="High Efficiency Image File Format">HEIC / HEIF</a></li> <li><a href="/wiki/High_Efficiency_Video_Coding#Main_Still_Picture" title="High Efficiency Video Coding">HEVC</a></li> <li><a href="/wiki/JBIG" title="JBIG">JBIG</a></li> <li><a href="/wiki/JBIG2" title="JBIG2">JBIG2</a></li> <li><a href="/wiki/JPEG" title="JPEG">JPEG</a></li> <li><a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a></li> <li><a href="/wiki/JPEG-LS" class="mw-redirect" title="JPEG-LS">JPEG-LS</a></li> <li><a href="/wiki/JPEG_XL" title="JPEG XL">JPEG XL</a></li> <li><a href="/wiki/JPEG_XR" title="JPEG XR">JPEG XR</a></li> <li><a href="/wiki/JPEG_XS" title="JPEG XS">JPEG XS</a></li> <li><a href="/wiki/JPEG_XT" title="JPEG XT">JPEG XT</a></li> <li><a href="/wiki/Portable_Network_Graphics" class="mw-redirect" title="Portable Network Graphics">PNG</a></li> <li><a href="/wiki/TIFF" title="TIFF">TIFF</a></li> <li><a href="/wiki/TIFF/EP" title="TIFF/EP">TIFF/EP</a></li> <li><a href="/wiki/TIFF/IT" class="mw-redirect" title="TIFF/IT">TIFF/IT</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/APNG" title="APNG">APNG</a></li> <li><a href="/wiki/AV1" title="AV1">AV1</a></li> <li><a href="/wiki/AVIF" title="AVIF">AVIF</a></li> <li><a href="/wiki/Better_Portable_Graphics" title="Better Portable Graphics">BPG</a></li> <li><a href="/wiki/DjVu" title="DjVu">DjVu</a></li> <li><a href="/wiki/OpenEXR" title="OpenEXR">EXR</a></li> <li><a href="/wiki/Free_Lossless_Image_Format" title="Free Lossless Image Format">FLIF</a></li> <li><a href="/wiki/ICER_(file_format)" title="ICER (file format)">ICER</a></li> <li><a href="/wiki/Multiple-image_Network_Graphics" title="Multiple-image Network Graphics">MNG</a></li> <li><a href="/wiki/Progressive_Graphics_File" title="Progressive Graphics File">PGF</a></li> <li><a href="/wiki/QOI_(image_format)" title="QOI (image format)">QOI</a></li> <li><a href="/wiki/QuickTime_VR" title="QuickTime VR">QTVR</a></li> <li><a href="/wiki/Wireless_Application_Protocol_Bitmap_Format" title="Wireless Application Protocol Bitmap Format">WBMP</a></li> <li><a href="/wiki/WebP" title="WebP">WebP</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Digital_container_format" class="mw-redirect" title="Digital container format">Containers</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/MPEG_elementary_stream" title="MPEG elementary stream">MPEG-ES</a> <ul><li><a href="/wiki/Packetized_elementary_stream" title="Packetized elementary stream">MPEG-PES</a></li></ul></li> <li><a href="/wiki/MPEG_program_stream" title="MPEG program stream">MPEG-PS</a></li> <li><a href="/wiki/MPEG_transport_stream" title="MPEG transport stream">MPEG-TS</a></li> <li><a href="/wiki/ISO/IEC_base_media_file_format" class="mw-redirect" title="ISO/IEC base media file format">ISO/IEC base media file format</a></li> <li><a href="/wiki/MPEG-4_Part_14" class="mw-redirect" title="MPEG-4 Part 14">MPEG-4 Part 14</a> (MP4)</li> <li><a href="/wiki/Motion_JPEG_2000" title="Motion JPEG 2000">Motion JPEG 2000</a></li> <li><a href="/wiki/MPEG-21" title="MPEG-21">MPEG-21 Part 9</a></li> <li><a href="/wiki/MPEG_media_transport" title="MPEG media transport">MPEG media transport</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/MPEG-2#Systems" title="MPEG-2">H.222.0</a></li> <li><a href="/wiki/Motion_JPEG_2000" title="Motion JPEG 2000">T.802</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Real-time_Transport_Protocol" title="Real-time Transport Protocol">RTP</a></li> <li><a href="/wiki/Ogg" title="Ogg">Ogg</a></li> <li><a href="/wiki/Matroska" title="Matroska">Matroska</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/Society_of_Motion_Picture_and_Television_Engineers" title="Society of Motion Picture and Television Engineers">SMPTE</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/General_Exchange_Format" title="General Exchange Format">GXF</a></li> <li><a href="/wiki/Material_Exchange_Format" title="Material Exchange Format">MXF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/3GP_and_3G2" title="3GP and 3G2">3GP and 3G2</a></li> <li><a href="/wiki/AMV_video_format" title="AMV video format">AMV</a></li> <li><a href="/wiki/Advanced_Systems_Format" title="Advanced Systems Format">ASF</a></li> <li><a href="/wiki/Audio_Interchange_File_Format" title="Audio Interchange File Format">AIFF</a></li> <li><a href="/wiki/Audio_Video_Interleave" title="Audio Video Interleave">AVI</a></li> <li><a href="/wiki/Au_file_format" title="Au file format">AU</a></li> <li><a href="/wiki/Better_Portable_Graphics" title="Better Portable Graphics">BPG</a></li> <li><a href="/wiki/Bink_Video" title="Bink Video">Bink</a> <ul><li><a href="/wiki/Smacker_video" title="Smacker video">Smacker</a></li></ul></li> <li><a href="/wiki/BMP_file_format" title="BMP file format">BMP</a></li> <li><a href="/wiki/DivX#DivX_Media_Format_(DMF)" title="DivX">DivX Media Format</a></li> <li><a href="/wiki/Enhanced_VOB" title="Enhanced VOB">EVO</a></li> <li><a href="/wiki/Flash_Video" title="Flash Video">Flash Video</a></li> <li><a href="/wiki/High_Efficiency_Image_File_Format" title="High Efficiency Image File Format">HEIF</a></li> <li><a href="/wiki/Interchange_File_Format" title="Interchange File Format">IFF</a></li> <li><a href="/wiki/.m2ts" title=".m2ts">M2TS</a></li> <li><a href="/wiki/Matroska" title="Matroska">Matroska</a> <ul><li><a href="/wiki/WebM" title="WebM">WebM</a></li></ul></li> <li><a href="/wiki/QuickTime_File_Format" title="QuickTime File Format">QuickTime File Format</a></li> <li><a href="/wiki/RatDVD" title="RatDVD">RatDVD</a></li> <li><a href="/wiki/RealMedia" title="RealMedia">RealMedia</a></li> <li><a href="/wiki/Resource_Interchange_File_Format" title="Resource Interchange File Format">RIFF</a> <ul><li><a href="/wiki/WAV" title="WAV">WAV</a></li></ul></li> <li><a href="/wiki/MOD_and_TOD" title="MOD and TOD">MOD and TOD</a></li> <li><a href="/wiki/VOB" title="VOB">VOB, IFO and BUP</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Collaborations</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/NETVC" title="NETVC">NETVC</a></li> <li><a href="/wiki/MPEG_LA" title="MPEG LA">MPEG LA</a></li> <li><a href="/wiki/Alliance_for_Open_Media" title="Alliance for Open Media">Alliance for Open Media</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Data_compression" title="Data compression">Methods</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Entropy_encoding" class="mw-redirect" title="Entropy encoding">Entropy</a> <ul><li><a href="/wiki/Arithmetic_coding" title="Arithmetic coding">Arithmetic</a></li> <li><a href="/wiki/Huffman_coding" title="Huffman coding">Huffman</a></li> <li><a href="/wiki/Modified_Huffman_coding" title="Modified Huffman coding">Modified</a></li></ul></li> <li><a href="/wiki/Linear_predictive_coding" title="Linear predictive coding">LPC</a> <ul><li><a href="/wiki/Algebraic_code-excited_linear_prediction" title="Algebraic code-excited linear prediction">ACELP</a></li> <li><a href="/wiki/Code-excited_linear_prediction" title="Code-excited linear prediction">CELP</a></li> <li><a href="/wiki/Line_spectral_pairs" title="Line spectral pairs">LSP</a></li> <li><a href="/wiki/Warped_linear_predictive_coding" title="Warped linear predictive coding">WLPC</a></li></ul></li> <li><a href="/wiki/Lossless_compression" title="Lossless compression">Lossless</a></li> <li><a href="/wiki/Lossy_compression" title="Lossy compression">Lossy</a></li> <li><a href="/wiki/LZ77_and_LZ78" title="LZ77 and LZ78">LZ</a> <ul><li><a href="/wiki/DEFLATE" class="mw-redirect" title="DEFLATE">DEFLATE</a></li> <li><a href="/wiki/Lempel%E2%80%93Ziv%E2%80%93Welch" title="Lempel–Ziv–Welch">LZW</a></li></ul></li> <li><a href="/wiki/Pulse-code_modulation" title="Pulse-code modulation">PCM</a> <ul><li><a href="/wiki/A-law_algorithm" title="A-law algorithm">A-law</a></li> <li><a href="/wiki/%CE%9C-law_algorithm" title="Μ-law algorithm">µ-law</a></li> <li><a href="/wiki/Adaptive_differential_pulse-code_modulation" title="Adaptive differential pulse-code modulation">ADPCM</a></li> <li><a href="/wiki/Differential_pulse-code_modulation" title="Differential pulse-code modulation">DPCM</a></li></ul></li> <li><a href="/wiki/Transform_coding" title="Transform coding">Transforms</a> <ul><li><a href="/wiki/Discrete_cosine_transform" title="Discrete cosine transform">DCT</a></li> <li><a href="/wiki/Fast_Fourier_transform" title="Fast Fourier transform">FFT</a></li> <li><a href="/wiki/Modified_discrete_cosine_transform" title="Modified discrete cosine transform">MDCT</a></li> <li><a href="/wiki/Wavelet" title="Wavelet">Wavelet</a> <ul><li><a href="/wiki/Daubechies_wavelet" title="Daubechies wavelet">Daubechies</a></li> <li><a href="/wiki/Discrete_wavelet_transform" title="Discrete wavelet transform">DWT</a></li></ul></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Comparison_of_audio_coding_formats" title="Comparison of audio coding formats">Comparison of audio coding formats</a></li> <li><a href="/wiki/Comparison_of_video_codecs" title="Comparison of video codecs">Comparison of video codecs</a></li> <li><a href="/wiki/List_of_codecs" title="List of codecs">List of codecs</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>See <a href="/wiki/Template:Compression_methods" title="Template:Compression methods">Compression methods</a> for techniques and <a href="/wiki/Template:Compression_software" 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