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<span>Variants</span> </div> </a> <button aria-controls="toc-Variants-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>Toggle Variants subsection</span> </button> <ul id="toc-Variants-sublist" class="vector-toc-list"> <li id="toc-aptX" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#aptX"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>aptX</span> </div> </a> <ul id="toc-aptX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enhanced_aptX" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Enhanced_aptX"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Enhanced aptX</span> </div> </a> <ul id="toc-Enhanced_aptX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-aptX_Live" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#aptX_Live"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>aptX Live</span> </div> </a> <ul id="toc-aptX_Live-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-aptX_LL" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#aptX_LL"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>aptX LL</span> </div> </a> <ul id="toc-aptX_LL-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-aptX_HD" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#aptX_HD"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>aptX HD</span> </div> </a> <ul id="toc-aptX_HD-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-aptX_Adaptive" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#aptX_Adaptive"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.6</span> <span>aptX Adaptive</span> </div> </a> <ul id="toc-aptX_Adaptive-sublist" class="vector-toc-list"> <li id="toc-aptX_Voice" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#aptX_Voice"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.6.1</span> <span>aptX Voice</span> </div> </a> <ul id="toc-aptX_Voice-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-aptX_Lossless" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#aptX_Lossless"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.6.2</span> <span>aptX Lossless</span> </div> </a> <ul id="toc-aptX_Lossless-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Mode_of_operation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mode_of_operation"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Mode of operation</span> </div> </a> <ul id="toc-Mode_of_operation-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 id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <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="Toggle the table of contents" > <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">Toggle the table of contents</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">aptX</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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hreflang="ko" data-title="AptX" 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/AptX" title="AptX – Italian" lang="it" hreflang="it" data-title="AptX" 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/AptX" title="AptX – Japanese" lang="ja" hreflang="ja" data-title="AptX" 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-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/AptX" title="AptX – Finnish" lang="fi" hreflang="fi" data-title="AptX" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/AptX" title="AptX – Chinese" lang="zh" hreflang="zh" data-title="AptX" data-language-autonym="中文" data-language-local-name="Chinese" 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/Q4782201#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</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="Namespaces"> <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" 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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">Family of proprietary audio codecs owned by Qualcomm</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output 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role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/40px-Ambox_important.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/60px-Ambox_important.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/80px-Ambox_important.svg.png 2x" data-file-width="40" data-file-height="40" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span"><div class="multiple-issues-text mw-collapsible"><b>This article has multiple issues.</b> Please help <b><a href="/wiki/Special:EditPage/AptX" title="Special:EditPage/AptX">improve it</a></b> or discuss these issues on the <b><a href="/wiki/Talk:AptX" title="Talk:AptX">talk page</a></b>. <small><i>(<a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance 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<b>may be too technical for most readers to understand</b>.<span class="hide-when-compact"> Please <a class="external text" href="https://en.wikipedia.org/w/index.php?title=AptX&action=edit">help improve it</a> to <a href="/wiki/Wikipedia:Make_technical_articles_understandable" title="Wikipedia:Make technical articles understandable">make it understandable to non-experts</a>, without removing the technical details.</span> <span class="date-container"><i>(<span class="date">June 2020</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> </div> </div><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <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"><caption class="infobox-title" style="padding-bottom:0.15em;">aptX</caption><tbody><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/File:QC_aptX_Vertical_Black_4754.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/25/QC_aptX_Vertical_Black_4754.png/200px-QC_aptX_Vertical_Black_4754.png" decoding="async" width="200" height="155" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/25/QC_aptX_Vertical_Black_4754.png/300px-QC_aptX_Vertical_Black_4754.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/25/QC_aptX_Vertical_Black_4754.png/400px-QC_aptX_Vertical_Black_4754.png 2x" data-file-width="792" data-file-height="612" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Media_type" title="Media type">Internet media type</a></th><td class="infobox-data" style="line-height:1.35em;">audio/aptx</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Developed by</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/Qualcomm" title="Qualcomm">Qualcomm</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" style="line-height:1.2em; padding-right:0.65em;">Type of format</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/Audio_codec" title="Audio codec">Audio codec</a></td></tr></tbody></table> <p><b>aptX</b> (<i>apt</i> stands for <i>audio processing technology</i><sup id="cite_ref-mixonline.com_3-0" class="reference"><a href="#cite_note-mixonline.com-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>) is a family of <a href="/wiki/Proprietary_software" title="Proprietary software">proprietary</a> <a href="/wiki/Audio_codec" title="Audio codec">audio codec</a> compression algorithms owned by <a href="/wiki/Qualcomm" title="Qualcomm">Qualcomm</a>, with a heavy emphasis on <a href="/wiki/Wireless_audio" class="mw-redirect" title="Wireless audio">wireless audio</a> applications. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The original compression algorithm was developed in the 1980s by Dr. Stephen Smyth as part of his <a href="/wiki/Ph.D." class="mw-redirect" title="Ph.D.">Ph.D.</a> research at <a href="/wiki/Queen%27s_University_Belfast" title="Queen's University Belfast">Queen's University Belfast</a> School of Electronics, Electrical Engineering and Computer Science<sup id="cite_ref-irishtimes_4-0" class="reference"><a href="#cite_note-irishtimes-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> its design is based on <a href="/wiki/Time_domain" title="Time domain">time domain</a> <a href="/wiki/Adaptive_DPCM" class="mw-redirect" title="Adaptive DPCM">ADPCM</a> principles without <a href="/wiki/Psychoacoustic" class="mw-redirect" title="Psychoacoustic">psychoacoustic</a> <a href="/wiki/Auditory_masking" title="Auditory masking">auditory masking</a> techniques. </p><p>The algorithm was then commercialized under the name aptX and first introduced to the commercial market as a semiconductor product, a custom programmed <a href="/wiki/Digital_signal_processor" title="Digital signal processor">DSP</a> integrated circuit with part name APTX100ED, which was initially adopted by <a href="/wiki/Broadcast_automation" title="Broadcast automation">broadcast automation</a> equipment manufacturers who required a means to store CD-quality audio on a computer <a href="/wiki/Hard_disk_drive" title="Hard disk drive">hard disk drive</a> for automatic <a href="/wiki/Playout" title="Playout">playout</a> during a radio show, for example, hence replacing the task of the <a href="/wiki/Disc_jockey" title="Disc jockey">disc jockey</a>. </p><p>The company was bought by <a href="/wiki/Solid_State_Logic" title="Solid State Logic">Solid State Logic</a> ca. 1988, and became part of <a href="/wiki/Carlton_Communications" title="Carlton Communications">Carlton Communications</a> plc.<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> in 1989. In the early 1990s, APT's codecs were used to transfer audio via <a href="/wiki/ISDN" title="ISDN">ISDN</a> lines<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> by companies such as <a href="/wiki/The_Walt_Disney_Company" title="The Walt Disney Company">Disney</a> to check dubbing done in Europe. On 23 December 1999,<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Solid State Logic was sold by Carlton Communications to <a href="/wiki/3i" title="3i">3i</a>.<sup id="cite_ref-9" class="reference"><a href="#cite_note-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> Then in 2005, Solid State Logic sold APT in a management buyout.<sup id="cite_ref-irishtimes_4-1" class="reference"><a href="#cite_note-irishtimes-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-mixonline.com_3-1" class="reference"><a href="#cite_note-mixonline.com-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> On 1 March 2005 <a href="/w/index.php?title=APT_Licensing&action=edit&redlink=1" class="new" title="APT Licensing (page does not exist)">APT Licensing Ltd.</a> was incorporated in <a href="/wiki/Belfast" title="Belfast">Belfast</a> (until 18 December 2008 named <i>Audio Processing Technology Holdings Limited</i>).<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>The range of aptX algorithms for real-time audio data compression expanded with intellectual property becoming available in the form of software, firmware and programmable hardware for <a href="/wiki/Professional_audio" title="Professional audio">professional audio</a>, television and radio <a href="/wiki/Broadcast" class="mw-redirect" title="Broadcast">broadcast</a>, and <a href="/wiki/Consumer_electronics" title="Consumer electronics">consumer electronics</a>, especially applications in wireless audio, low latency wireless audio for gaming and video, and <a href="/wiki/Audio_over_IP" title="Audio over IP">audio over IP</a>.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> In addition, the aptX codec was introduced as an alternative to <a href="/wiki/SBC_(codec)" title="SBC (codec)">SBC</a>, the <a href="/wiki/Sub-band_coding" title="Sub-band coding">sub-band coding</a> scheme for lossy stereo/mono audio streaming mandated by the <a href="/wiki/Bluetooth_SIG" class="mw-redirect" title="Bluetooth SIG">Bluetooth SIG</a> for the Advanced Audio Distribution Profile (<a href="/wiki/A2DP" class="mw-redirect" title="A2DP">A2DP</a>) of <a href="/wiki/Bluetooth" title="Bluetooth">Bluetooth</a>, the short-range <a href="/wiki/Wireless_personal_area_network" class="mw-redirect" title="Wireless personal area network">wireless personal area network</a> standard. aptX is supported in high-performance Bluetooth peripherals.<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-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p><p>Today, standard aptX and Enhanced aptX (E-aptX) are used in both ISDN and IP audio codec hardware from numerous broadcast equipment makers. An addition to the aptX family in the form of aptX Live, offering up to 8:1 compression, was introduced in 2007;<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> and aptX HD, a lossy, but scalable, adaptive, "near-lossless" quality audio codec was announced in April 2009.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p><p>The company split in 2009; the broadcast hardware business was acquired by <a href="/w/index.php?title=Audemat&action=edit&redlink=1" class="new" title="Audemat (page does not exist)">Audemat</a> and became part of what is now <a href="/w/index.php?title=WorldCast_Systems&action=edit&redlink=1" class="new" title="WorldCast Systems (page does not exist)">WorldCast Systems</a>, and the licensing business became APT Licensing and was acquired by <a href="/wiki/CSR_plc" title="CSR plc">CSR plc</a> in 2010.<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> aptX was previously styled <b>apt-X</b> until acquired by CSR in 2010. CSR was subsequently acquired by Qualcomm in August 2015.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Variants">Variants</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=2" title="Edit section: Variants"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable" style="text-align:center"> <caption>aptX variants<sup id="cite_ref-main_source_19-0" class="reference"><a href="#cite_note-main_source-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </caption> <tbody><tr> <th rowspan="2" colspan="2" style="border-bottom:2px solid gray; background-color:#D8D9DD"> </th> <th style="border-bottom:hidden; background-color:#D8D9DD"><a href="/wiki/SBC_(codec)" title="SBC (codec)">SBC</a> </th> <th style="border-bottom:hidden; background-color:#D6F9D6">aptX </th> <th style="border-bottom:hidden; background-color:#D6F9D6">aptX LL </th> <th style="border-bottom:hidden; background-color:#D6F9D6">aptX HD </th> <th colspan="3" style="border-bottom:hidden; background-color:#D6F9D6">aptX Adaptive </th> <th style="border-bottom:hidden; background-color:#D8D9DD"><a href="/wiki/Compact_Disc_Digital_Audio" title="Compact Disc Digital Audio">Audio CD</a> </th></tr> <tr> <th style="background-color:#D8D9DD; border-bottom:2px solid gray"><small>(for reference)</small> </th> <th style="background-color:#D6F9D6; border-bottom:2px solid gray"> </th> <th style="background-color:#D6F9D6; border-bottom:2px solid gray"> </th> <th style="background-color:#D6F9D6; border-bottom:2px solid gray"> </th> <th style="background-color:#D6F9D6; border-bottom:2px solid gray; font-weight:lighter">@ 279 kbit/s </th> <th style="background-color:#D6F9D6; border-bottom:2px solid gray; font-weight:lighter">@ 420 kbit/s </th> <th style="background-color:#D6F9D6; border-bottom:2px solid gray; font-weight:lighter">@ up to ~1.2 mbit/s </th> <th style="background-color:#D8D9DD; border-bottom:2px solid gray"><small>(for reference)</small> </th></tr> <tr> <th rowspan="6">misc. </th> <th style="text-align:left">Launch </th> <td style="background-color:#F0F2F6"><b>?</b> </td> <td><b>< 2009</b><sup id="cite_ref-Qualcomm_history_20-0" class="reference"><a href="#cite_note-Qualcomm_history-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup></td> <td><b>2012</b><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup></td> <td><b>2016</b><sup id="cite_ref-Qualcomm_history_20-1" class="reference"><a href="#cite_note-Qualcomm_history-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup></td> <td colspan="2"><b>2018</b><sup id="cite_ref-Qualcomm_history_20-2" class="reference"><a href="#cite_note-Qualcomm_history-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </td> <td><b>2021</b><sup id="cite_ref-:0_22-0" class="reference"><a href="#cite_note-:0-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </td> <td style="background-color:#F0F2F6"><b>1980s</b> </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Trademark" title="Trademark">Trademark</a> </th> <td style="background-color:#F0F2F6">– </td> <td colspan="6"><a href="/wiki/Qualcomm" title="Qualcomm">Qualcomm</a><br /><small>(until August 2015: <a href="/wiki/CSR_(company)" class="mw-redirect" title="CSR (company)">CSR</a>, until July 2010: <a href="/w/index.php?title=APT_Licensing&action=edit&redlink=1" class="new" title="APT Licensing (page does not exist)">APT Licensing Ltd.</a>, until March 2005: <a href="/wiki/Solid_State_Logic" title="Solid State Logic">Solid State Logic</a>)</small></td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left">Related <a href="/wiki/Patent" title="Patent">patents</a> </th> <td style="background-color:#F0F2F6"><style data-mw-deduplicate="TemplateStyles:r1041539562">.mw-parser-output .citation{word-wrap:break-word}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}</style><span class="citation patent"><a rel="nofollow" class="external text" href="https://worldwide.espacenet.com/textdoc?DB=EPODOC&IDX=EP0400755B1">EP 0400755B1</a></span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.number=0400755B1&rft.cc=EP&rft.title="><span style="display: none;"> </span></span><sup id="cite_ref-ep0400755B1_23-0" class="reference"><a href="#cite_note-ep0400755B1-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> (expired)</td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1041539562"><span class="citation patent"><a rel="nofollow" class="external text" href="https://worldwide.espacenet.com/textdoc?DB=EPODOC&IDX=EP0398973B1">EP 0398973B1</a></span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.number=0398973B1&rft.cc=EP&rft.title="><span style="display: none;"> </span></span><sup id="cite_ref-ep0398973B1_24-0" class="reference"><a href="#cite_note-ep0398973B1-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> (revoked)</td> <td>aptX,<br /> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1041539562"><span class="citation patent"><a rel="nofollow" class="external text" href="https://worldwide.espacenet.com/textdoc?DB=EPODOC&IDX=US9398620B1">US 9398620B1</a></span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.number=9398620B1&rft.cc=US&rft.title="><span style="display: none;"> </span></span><sup id="cite_ref-US9398620B1_25-0" class="reference"><a href="#cite_note-US9398620B1-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> (expired)</td> <td>aptX</td> <td colspan="3">?</td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Free_software" title="Free software">Free implementations</a> </th> <td style="background-color:#F0F2F6"><a href="/wiki/FFmpeg" title="FFmpeg">FFmpeg</a>, libsbc</td> <td><a href="/wiki/FFmpeg" title="FFmpeg">FFmpeg</a>, libopenaptx</td> <td><a href="/wiki/FFmpeg" title="FFmpeg">FFmpeg</a>, libopenaptx</td> <td><a href="/wiki/FFmpeg" title="FFmpeg">FFmpeg</a>, libopenaptx</td> <td colspan="3">N/A</td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Proprietary_software" title="Proprietary software">Proprietary implementations</a> </th> <td style="background-color:#F0F2F6">Multiple</td> <td>Qualcomm libaptX<sup id="cite_ref-aosp-aptx_26-0" class="reference"><a href="#cite_note-aosp-aptx-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup></td> <td>None</td> <td>Qualcomm libaptXHD<sup id="cite_ref-aosp-aptx_26-1" class="reference"><a href="#cite_note-aosp-aptx-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup></td> <td colspan="3">?</td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left">Chip </th> <td style="background-color:#F0F2F6">– </td> <td>CSR8635</td> <td>CSR8670</td> <td>CSR8675</td> <td colspan="3">QCC5100</td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th rowspan="8">Audio<br />Encoding </th> <th style="text-align:left"><a href="/wiki/Audio_bit_depth" title="Audio bit depth">Word depth</a> </th> <td style="background-color:#F0F2F6"><b>?</b> </td> <td><b>16-bit</b></td> <td><b>16-bit</b></td> <td><b>16-bit</b><br /><b>24-bit</b></td> <td colspan="2"><b>24-bit</b> </td> <td><b>16-bit</b></td> <td style="background-color:#F0F2F6"><b>16-bit</b> </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Sampling_rate" class="mw-redirect" title="Sampling rate">Sampling rate</a> </th> <td style="background-color:#F0F2F6">44.1 kHz<br />48 kHz<br /> </td> <td>44.1 kHz<br />48 kHz<br /> </td> <td>44.1 kHz<br />48 kHz<br /> </td> <td>44.1 kHz<br />48 kHz<br /> </td> <td colspan="2">44.1 kHz<br />48 kHz<br />96 kHz </td> <td>44.1 kHz</td> <td style="background-color:#F0F2F6">44.1 kHz<br /><br />  </td></tr> <tr> <th style="text-align:left" rowspan="2"><a href="/wiki/Bit_rate" title="Bit rate">Bit rate</a> </th> <td style="background-color:#F0F2F6"><b>345 kbit/s</b> <small>(@ 48 kHz)</small></td> <td><b>352 kbit/s</b> <small>(@ 44.1 kHz)</small><br /><b>384 kbit/s</b> <small>(@ 48 kHz)</small></td> <td><b>352 kbit/s</b> <small>(@ 48 kHz)</small></td> <td><b>576 kbit/s</b> <small>(24 bits @ 48 kHz)</small></td> <td><b>279 kbit/s</b></td> <td><b>420 kbit/s</b> </td> <td><b>~140 kbit/s to 1.2 mbit/s</b> (content dependent)<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:0_22-1" class="reference"><a href="#cite_note-:0-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup></td> <td style="background-color:#F0F2F6"><b>1411 kbit/s</b> <small>(@ 44.1 kHz)</small> </td></tr> <tr> <td style="background-color:#F0F2F6">Constant</td> <td>Constant</td> <td>Constant</td> <td>Constant</td> <td colspan="2">Variable </td> <td>Variable</td> <td style="background-color:#F0F2F6">Constant </td></tr> <tr> <th style="text-align:left"><a href="/w/index.php?title=Codec_latency&action=edit&redlink=1" class="new" title="Codec latency (page does not exist)">Codec latency</a> </th> <td style="background-color:#F0F2F6">? </td> <td>1.8 – 2.0 ms</td> <td>?</td> <td>1.8 – 2.0 ms</td> <td colspan="2">1.4 – 2.0 ms </td> <td>?</td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left">Hardware transmitter <a href="/wiki/Latency_(audio)" title="Latency (audio)">latency</a> </th> <td style="background-color:#F0F2F6">?</td> <td>?</td> <td><b>≈ 40 ms</b><sup id="cite_ref-aptx-ll_28-0" class="reference"><a href="#cite_note-aptx-ll-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup><br /><small>(using dedicated antenna)</small></td> <td>?</td> <td colspan="2"><b>≈ 80 ms</b><sup id="cite_ref-aptx-adaptive_29-0" class="reference"><a href="#cite_note-aptx-adaptive-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> </td> <td>?</td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left">Software transmitter <a href="/wiki/Latency_(audio)" title="Latency (audio)">latency</a> <small>(most phones)</small> </th> <td colspan="7"><b>200 – 500 ms</b><sup id="cite_ref-android-latency_30-0" class="reference"><a href="#cite_note-android-latency-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup><br /><small>depending on the transmitting device</small></td> <td style="background-color:#F0F2F6">– </td></tr> <tr> <th style="text-align:left">Backwards compatible with </th> <td style="background-color:#F0F2F6">– </td> <td>SBC<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="Looks like a totally separated codec (February 2024)">citation needed</span></a></i>]</sup></td> <td>SBC, aptX</td> <td>SBC, aptX</td> <td colspan="2">SBC, aptX, aptX HD </td> <td>?</td> <td style="background-color:#F0F2F6">? </td></tr> <tr> <th rowspan="7">Sound<br />quality </th> <th style="text-align:left"><a href="/wiki/THD%2BN" class="mw-redirect" title="THD+N">THD+N</a> @ 1 kHz </th> <td style="background-color:#F0F2F6"> </td> <td>−67 dB<sup id="cite_ref-Qualcomm_aptX_31-0" class="reference"><a href="#cite_note-Qualcomm_aptX-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> or −85 dB?<sup id="cite_ref-main_source_19-1" class="reference"><a href="#cite_note-main_source-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup></td> <td>−85 dB</td> <td>-80 dB<sup id="cite_ref-Qualcomm_aptX_HD_32-0" class="reference"><a href="#cite_note-Qualcomm_aptX_HD-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> or −90 dB?<sup id="cite_ref-main_source_19-2" class="reference"><a href="#cite_note-main_source-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup></td> <td>−90 dB</td> <td>−100 dB </td> <td>−96 dB</td> <td style="background-color:#F0F2F6">−96 dB </td></tr> <tr> <th style="text-align:left"><a href="/w/index.php?title=Multi-tone&action=edit&redlink=1" class="new" title="Multi-tone (page does not exist)">Multi-tone</a> @ 1 kHz </th> <td style="background-color:#F0F2F6"> </td> <td>−100 dB</td> <td>?</td> <td>−100 dB</td> <td>−90 dB</td> <td>−100 dB </td> <td>?</td> <td style="background-color:#F0F2F6"> </td></tr> <tr> <th style="text-align:left">Multi-tone @ 10 kHz </th> <td style="background-color:#F0F2F6"> </td> <td>−65 dB</td> <td>?</td> <td>−90 dB</td> <td>−85 dB</td> <td>−95 dB </td> <td>?</td> <td style="background-color:#F0F2F6"> </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Crosstalk" title="Crosstalk">Crosstalk</a> </th> <td style="background-color:#F0F2F6"> </td> <td>−120 dB</td> <td>?</td> <td>−155 dB</td> <td>−90 dB</td> <td>−200 dB </td> <td>?</td> <td style="background-color:#F0F2F6"> </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Signal-to-noise_ratio" title="Signal-to-noise ratio">SNR</a> @ 1 kHz </th> <td style="background-color:#F0F2F6"> </td> <td>93 dB</td> <td>93 dB</td> <td>129 dB</td> <td>130 dB</td> <td>135 dB </td> <td>−96 dB</td> <td style="background-color:#F0F2F6">−96 dB </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Perceptual_Evaluation_of_Audio_Quality" title="Perceptual Evaluation of Audio Quality">PEAQ</a> ODG </th> <td style="background-color:#F0F2F6"> </td> <td>−0.18<sup id="cite_ref-Qualcomm_aptX_31-1" class="reference"><a href="#cite_note-Qualcomm_aptX-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> or −0.08?<sup id="cite_ref-main_source_19-3" class="reference"><a href="#cite_note-main_source-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup></td> <td>?</td> <td>0.05<sup id="cite_ref-Qualcomm_aptX_HD_32-1" class="reference"><a href="#cite_note-Qualcomm_aptX_HD-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> or 0.04?<sup id="cite_ref-main_source_19-4" class="reference"><a href="#cite_note-main_source-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup></td> <td>−0.06</td> <td>0.045 </td> <td>?</td> <td style="background-color:#F0F2F6"> </td></tr> <tr> <th style="text-align:left"><a href="/wiki/Frequency_response" title="Frequency response">Frequency response</a> over BT </th> <td style="background-color:#F0F2F6"> </td> <td>20 Hz – 22.7 kHz</td> <td>20 Hz – 22.7 kHz</td> <td>20 Hz – 22.7 kHz</td> <td colspan="2">20 Hz – 22.7 kHz </td> <td>20 Hz – 22 kHz</td> <td style="background-color:#F0F2F6">20 Hz – 22 kHz </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="aptX">aptX</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=3" title="Edit section: aptX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The aptX audio codec is used for consumer and automotive wireless audio applications, notably the real-time streaming of lossy stereo audio over the Bluetooth <a href="/wiki/A2DP" class="mw-redirect" title="A2DP">A2DP</a> connection/pairing between a "source" device (such as a smartphone, tablet or laptop) and a "sink" accessory (e.g. a Bluetooth stereo speaker, headset or headphones). The technology must be incorporated in both transmitter and receiver to derive the sonic benefits of aptX audio coding over the default sub-band coding (SBC) mandated by the Bluetooth standard. Products bearing the CSR aptX logo are certified for interoperability with each other.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Enhanced_aptX">Enhanced aptX</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=4" title="Edit section: Enhanced aptX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>Enhanced aptX</i> provides coding at 4:1 compression ratios for professional audio broadcast applications and is suitable for AM, FM, DAB, HD Radio and 5.1. Enhanced aptX can handle up to 4 stereo pairs of AES3 audio and compress to 1 AES3 stream for transmit. Enhanced aptX supports bit-depths of 16, 20 or 24 bit. For audio sampled at 48 kHz, the bit-rate for E-aptX is 384 kbit/s (dual channel), 768 kbit/s (quad channel), 1024 kbit/s (5.1-channel), and 1280 kbit/s (5.1 channels plus stereo). Its lowest bit-rate is 60(?) kbit/s for mono audio sampled at 16 kHz, offering about 7.5 kHz frequency response just below that of wideband telephony codecs (which usually operate at 16 kHz sampling rate).<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="aptX_Live">aptX Live</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=5" title="Edit section: aptX Live"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>aptX Live</i> is a low-complexity audio codec that is specifically designed to maximise digital <a href="/wiki/Wireless_microphone" title="Wireless microphone">wireless microphone</a> channel density in bandwidth-constrained scenarios, such as live performance (a.k.a. Programme Making and Special Events), where the spectrum-efficiency of radio-based devices (wireless microphones, in-ear monitoring, talk-back systems) is becoming a prime operational consideration. aptX Live offers up to 8:1 compression of 24-bit resolution digital audio streams while maintaining acoustic integrity (approx. 120 dB dynamic range) and ensuring latency of around 1.8 ms at 48 kHz sampling rates. In addition, aptX Live also features techniques that aid connection in situations where the <a href="/wiki/Bit_error_rate" title="Bit error rate">bit error rate</a> (BER) is excessively high. </p> <div class="mw-heading mw-heading3"><h3 id="aptX_LL">aptX LL</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=6" title="Edit section: aptX LL"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>aptX LL</i> or <i>aptX Low Latency</i> is intended for video and gaming applications requiring comfortable audio-video synchronization whenever the stereo audio is transmitted over short-range radio to the listener(s) using the Bluetooth <a href="/wiki/A2DP" class="mw-redirect" title="A2DP">A2DP</a> audio profile standard. The technology offers an end-to-end latency of 32 ms over Bluetooth. By comparison, the latency of standard Bluetooth stereo varies greatly depending on the system implementation and buffering. Solutions are available that use standard SBC encoding/decoding that achieve end-to-end latency of less than 40 ms. The recommended latency for <a href="/wiki/Audio-to-video_synchronization" title="Audio-to-video synchronization">audio-to-video synchronization</a> in broadcast television is within +40 ms and −60 ms (audio before/after video, respectively).<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> However, AptX Low Latency requires a dedicated, wireless antenna, so it did not achieve much adoption in smartphones and was retired by Qualcomm in favor of aptX Adaptive.<sup id="cite_ref-SoundGuys_36-0" class="reference"><a href="#cite_note-SoundGuys-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> Its main competitor is the <a href="/wiki/LHDC_(codec)#LLAC" title="LHDC (codec)">LLAC</a>. </p> <div class="mw-heading mw-heading3"><h3 id="aptX_HD">aptX HD</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=7" title="Edit section: aptX HD"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>aptX HD</i> or <i>aptX High Definition</i> has bit-rate of 576 kbit/s. It supports high-definition audio up to 48 kHz sampling rates and sample resolutions up to 24 bits. Unlike the name suggests, the codec is still considered lossy;<sup id="cite_ref-AVHub_2016_38-0" class="reference"><a href="#cite_note-AVHub_2016-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup> however, it permits a "hybrid" coding scheme for applications where average or peak compressed data rates must be capped at a constrained level. This involves the dynamic application of "near lossless" coding for those sections of audio where completely lossless coding is impossible due to bandwidth constraints. "Near lossless" coding maintains a high-definition audio quality, retaining audio frequencies up to 20 kHz and a dynamic range of at least 120 dB. Its main competitors are <a href="/wiki/LDAC_(codec)" title="LDAC (codec)">LDAC codec</a> developed by Sony and <a href="/wiki/LHDC_(codec)" title="LHDC (codec)">LHDC</a>. </p><p>Another scalable parameter within aptX HD is coding latency. It can be dynamically traded against other parameters such as levels of compression and computational complexity. The latency of the aptX HD codec can be scaled to as low as 1 ms for 48 kHz sampled audio, depending on the settings of other configurable parameters. aptX HD performs particularly well against other lossless codecs when the coding latency is constrained to be small, such as 5 ms or less, making it particularly appropriate for delay-sensitive interactive audio applications. </p><p>Many lossless codecs possess the benefit of a low computational overhead compared to well-known lossy codecs, such as <a href="/wiki/MP3" title="MP3">MP3</a> and <a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a>. This is particularly important for deeply embedded audio applications running on low-power mobile devices. aptX HD promotes low computational overhead by dynamically selecting the simplest coding functions for each short segment of audio whilst complying with other operational constraints, such as levels of compression and coding delay. Depending on the settings of other scalable parameters, aptX HD can encode a 48 kHz 16-bit stereo audio stream using only 10 <a href="/wiki/Million_instructions_per_second" class="mw-redirect" title="Million instructions per second">MIPS</a> on a modern <a href="/wiki/RISC" class="mw-redirect" title="RISC">RISC</a> <a href="/wiki/Central_processing_unit" title="Central processing unit">processor</a> with <a href="/wiki/Signal_processing" title="Signal processing">signal processing</a> extensions. The corresponding decoder represents only 6 MIPS on the same platform. </p><p>User metadata and special synchronization data can be incorporated into the compressed format at configurable rates. The latter permits rapid decoder resynchronization in the event of data corruption or loss over communications links where <a href="/wiki/Quality_of_service" title="Quality of service">quality of service</a> (QoS) can vary rapidly. Depending on the settings of parameters, decoder resynchronization can occur within 1–2 ms.<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="aptX_Adaptive">aptX Adaptive</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=8" title="Edit section: aptX Adaptive"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>aptX Adaptive</i> is a next-generation dynamically adjustable audio codec intended for premium audio quality and low-latency. aptX Adaptive's bitrate scales dynamically between 279 kbit/s and 420 kbit/s. It also works with a shared, rather than dedicated, wireless antenna.<sup id="cite_ref-SoundGuys_36-1" class="reference"><a href="#cite_note-SoundGuys-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> Qualcomm claims their new compression algorithm provides a compression ratio between 5:1 to 10:1. This allows aptX Adaptive at 279 kbit/s and 420 kbit/s to produce the same sound quality as aptX at 352 kbit/s and aptX HD at 576 kbit/s. aptX Adaptive supports 16 and 24 bit-depths at 44.1, 48, and 96 kHz sample rates. Actual 96 kHz support, however, is depending on actual product hardware implementation. For example, B&O H95 only support 48 kHz at max even with AptX Adaptive support. Hardware aptX Adaptive has end-to-end latency of 80 ms,<sup id="cite_ref-aptx-adaptive_29-1" class="reference"><a href="#cite_note-aptx-adaptive-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> but most phones are using a software transmitter - which does not have any latency advantages over other codecs.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> aptX Adaptive is also backward compatible with older aptX and aptX HD codecs, but not with aptX LL.<sup id="cite_ref-SoundGuys_36-2" class="reference"><a href="#cite_note-SoundGuys-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="aptX_Voice">aptX Voice</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=9" title="Edit section: aptX Voice"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>aptX Voice</i> is a new feature of aptX Adaptive, and is designed to significantly improve the quality of voice for those using Bluetooth accessories to make voice calls. It does this by delivering 32 kHz voice call quality within the <a href="/wiki/List_of_Bluetooth_profiles#Hands-Free_Profile_(HFP)" title="List of Bluetooth profiles">Bluetooth Hands-Free Profile</a>.<sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="aptX_Lossless">aptX Lossless</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=10" title="Edit section: aptX Lossless"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 2021, Qualcomm announced aptX Lossless, described as a new capability of the aptX Adaptive codec aimed to deliver CD-quality, 16-bit, 44.1kHz lossless audio over Bluetooth. aptX Lossless utilizes Qualcomm Bluetooth High Speed Link technology to scale up to about 1.2 mbit/s in favorable RF environments.<sup id="cite_ref-:0_22-2" class="reference"><a href="#cite_note-:0-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mode_of_operation">Mode of operation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=AptX&action=edit&section=11" title="Edit section: Mode of operation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The example CD-quality 16-bit 44 kHz (up to 22 kHz signal bandwidth) stream is divided by two layers of 64-tap QMF (<a href="/wiki/Quadrature_mirror_filter" title="Quadrature mirror filter">Quadrature mirror filter</a>) into four 16-bit subbands of 11 kHz (up to 5.5 kHz signal bandwidth each). The first 64-tap QMF divides into two bands (0–11 kHz and 11–22 kHz bands), and then each one is fed into another 64-tap QMF dividing into four bands: 0–5.5 kHz, 5.5–11 kHz, 11–16.5 kHz and 16.5–22 kHz. Reduced variance is generally expected to be found in higher bands compared to lower bands, thus ADPCM is employed to allocate bits optimally. </p><p>Each band is coded with ADPCM using bit allocation of 8 bits for band 1 (0-5.5 kHz spectrum), 4 bits for band 2 (5.5–11 kHz), 2 bits each for bands 3 and 4 (11-16.5 kHz and 16.5–22 kHz). A future modification is considered with adaptive bit reallocation based on variance analysis of each subband, for example 9, 2, 3, 2 etc. </p><p>As a result, for mono channel, 16 bits @ 44.1 kHz=705.6 kbit/s input is converted into (4×16) 64 bits@11.025 kHz=705.6 kbit/s and then to (8+4+2+2) 16 bits @ 11.025 kHz=176.4 kbit/s. </p><p>Optionally (adds a small delay) a short-term <a href="/wiki/RMSE" class="mw-redirect" title="RMSE">RMSE</a> analyzer is used to reduce dynamic range, and thus allocate bits more effectively during quiet passages (i.e. lossy format). </p><p>For a stereo signal, a standard PCM 1.4-Mbit stream is converted into 352 Kbit/sec aptX stream. </p><p>Details can be found in the EP0398973B1<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">[</span>46<span class="cite-bracket">]</span></a></sup> patent. The main reasoning is that signal variation is reduced at higher frequencies, which makes it amenable to coding with codecs like ADPCM. </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=AptX&action=edit&section=12" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/List_of_codecs" title="List of codecs">List of codecs</a></li> <li><a href="/wiki/LDAC_(codec)" title="LDAC (codec)">LDAC (codec)</a> (competitor codec)</li> <li><a href="/wiki/LHDC_(codec)" title="LHDC (codec)">LHDC</a> and <a href="/wiki/LHDC_(codec)#LLAC" title="LHDC (codec)">LLAC</a> (competitor codec)</li> <li><a href="/wiki/Lossy_data_compression" class="mw-redirect" title="Lossy data compression">Lossy data compression</a></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=AptX&action=edit&section=13" 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://web.archive.org/web/20160725101615/http://www.csr.com/products/aptx">"aptX Bluetooth Music Audio Codec"</a>. <a href="/wiki/CSR_plc" title="CSR plc">CSR plc</a>. 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Retrieved <span class="nowrap">2016-07-23</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=About+aptX&rft_id=http%3A%2F%2Fwww.aptx.com%2Fabout-aptx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" class="Z3988"></span></span> </li> <li id="cite_note-mixonline.com-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-mixonline.com_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-mixonline.com_3-1"><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 class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.mixonline.com/technology/solid-state-logic-sells-apt-381257">"Solid State Logic Sells APT (Audio Processing Technology)"</a>. <i>mixonline.com</i>. May 12, 2005.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=mixonline.com&rft.atitle=Solid+State+Logic+Sells+APT+%28Audio+Processing+Technology%29&rft.date=2005-05-12&rft_id=https%3A%2F%2Fwww.mixonline.com%2Ftechnology%2Fsolid-state-logic-sells-apt-381257&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" class="Z3988"></span></span> </li> <li id="cite_note-irishtimes-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-irishtimes_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-irishtimes_4-1"><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 class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.irishtimes.com/business/adventure-ends-for-local-management-team-who-took-on-big-boys-1.632069">"Adventure ends for local management team who took on big boys"</a>. <i>irishtimes.com</i>. 2010-08-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-09-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=irishtimes.com&rft.atitle=Adventure+ends+for+local+management+team+who+took+on+big+boys&rft.date=2010-08-03&rft_id=https%3A%2F%2Fwww.irishtimes.com%2Fbusiness%2Fadventure-ends-for-local-management-team-who-took-on-big-boys-1.632069&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" 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"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://archive.today/20190928175142/https://www.referenceforbusiness.com/history2/92/Carlton-Communications-PLC.html">"Company profile and background information on Carlton Communications PLC"</a>. Archived from the original on 2019-09-28<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-25</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Company+profile+and+background+information+on+Carlton+Communications+PLC&rft_id=https%3A%2F%2Fwww.referenceforbusiness.com%2Fhistory2%2F92%2FCarlton-Communications-PLC.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" 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: bot: original URL status unknown (<a href="/wiki/Category:CS1_maint:_bot:_original_URL_status_unknown" title="Category:CS1 maint: bot: original URL status unknown">link</a>)</span></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"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.aptx.com/history">"History of aptX"</a>. <i>aptx.com</i>. <a rel="nofollow" class="external text" href="https://archive.today/20190928162749/https://www.aptx.com/history">Archived</a> from the original on September 28, 2019<span class="reference-accessdate">. Retrieved <span class="nowrap">September 28,</span> 2019</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=aptx.com&rft.atitle=History+of+aptX&rft_id=https%3A%2F%2Fwww.aptx.com%2Fhistory&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" class="Z3988"></span></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"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://archive.today/20190928170004/http://www.digifon.com/Blog041.html">"About APT-X"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.digifon.com/Blog041.html">the original</a> on September 28, 2019<span class="reference-accessdate">. Retrieved <span class="nowrap">September 28,</span> 2019</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=About+APT-X&rft_id=http%3A%2F%2Fwww.digifon.com%2FBlog041.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" class="Z3988"></span> The author is a member of the Audio Engineering Society (<a rel="nofollow" class="external text" href="https://archive.today/20190928165646/https://www.google.com/search?q=%22dave+immer%22&oq=%22dave+immer%22&aqs=chrome..69i57j0l4j69i60.2431j0j4&sourceid=chrome&ie=UTF-8%23spf=1569689799547">aes.org</a>)</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</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://www.theguardian.com/business/1999/dec/23/2">"BA cuts stake in Equant"</a>. <i><a href="/wiki/TheGuardian.com" class="mw-redirect" title="TheGuardian.com">TheGuardian.com</a></i>. December 23, 1999. <a rel="nofollow" class="external text" href="https://archive.today/20190928190655/https://www.theguardian.com/business/1999/dec/23/2">Archived</a> from the original on September 28, 2019<span class="reference-accessdate">. Retrieved <span class="nowrap">September 28,</span> 2019</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=TheGuardian.com&rft.atitle=BA+cuts+stake+in+Equant&rft.date=1999-12-23&rft_id=https%3A%2F%2Fwww.theguardian.com%2Fbusiness%2F1999%2Fdec%2F23%2F2&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</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://variety.com/1999/biz/news/carlton-sells-solid-state-arm-1117760329/#!">"Carlton sells Solid State arm"</a>. <a href="/wiki/Variety.com" class="mw-redirect" title="Variety.com">variety.com</a>. <a rel="nofollow" class="external text" href="https://archive.today/bPQnQ/">Archived</a> from the original on September 28, 2019.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Carlton+sells+Solid+State+arm&rft.pub=variety.com&rft_id=https%3A%2F%2Fvariety.com%2F1999%2Fbiz%2Fnews%2Fcarlton-sells-solid-state-arm-1117760329%2F%23%21&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" 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="https://www.gracesguide.co.uk/Carlton_Communications">"Carlton Communications"</a>. <a href="/wiki/Grace%27s_Guide" class="mw-redirect" title="Grace's Guide">Grace's Guide</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Carlton+Communications&rft.pub=Grace%27s+Guide&rft_id=https%3A%2F%2Fwww.gracesguide.co.uk%2FCarlton_Communications&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAptX" 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"><a rel="nofollow" class="external text" href="https://beta.companieshouse.gov.uk/company/NI054094">APT Licensing Limited</a> on <i>Companies House</i></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</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.aes.org/events/35/programmeP2.html">"Programme, Thursday 12th February"</a>. Audio Engineering Society. 2009-02-12<span class="reference-accessdate">. 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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_formats" 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 href="/wiki/H.263" title="H.263">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></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><a href="/wiki/L2HC" title="L2HC">L2HC</a></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 class="mw-selflink selflink">aptX</a></li> <li><a class="mw-selflink-fragment" href="#aptX_HD">aptX HD</a></li> <li><a class="mw-selflink-fragment" href="#aptX_Low_Latency">aptX Low Latency</a></li> <li><a class="mw-selflink-fragment" href="#aptX_Adaptive">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" title="Template:Compression software">Compression software</a> for codecs</div></td></tr></tbody></table></div>    </div><noscript><img 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