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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html lang="en">
<head>
<meta charset="UTF-8" />
<title>W3C Timed Text Working Group</title>
<link rel="stylesheet" href="https://www.w3.org/2008/WebVideo/Fragments/style.css" type="text/css"
media="all">
<style type="text/css" media="screen">
dl.items {margin: 1em 2em;}
dl.items dt {margin: 1.5em 0 0 1em;}
dl.items dt a {font-weight: bold;}
dl.items dd {margin: 0.5em 0 0 1em;}
acronym { border-bottom: black dashed 1px }
div#navigation li.current { color: white;
font-weight: bold;
}
.small { font-size: 85%; }
figcaption {font-style: italic; font-size: 75%; color: gray ; border: 1px solid gray ; width: 700px;}
input[type="text"] { border: 1px solid black }
</style>
</head>
<body>
<div id="page">
<h1>Timed Text Working Group<br />
<small>Delivering Captioning and Video Description for the Web</small></h1>
</div>
<!--
<div id="navigation"><ul> <li><a href="https://www.w3.org/Consortium/">About W3C</a></li> <li class="current">Home</li> <li><a href="../../01/media-annotations-wg.html">Charter</a></li> <li><a href="@@">Participants</a></li></ul></div>-->
<div id="main">
<p class="logo"><a href="/"><img src="https://www.w3.org/Icons/w3c_home" alt="W3C"
border="0" height="48" width="72" /></a></p>
<!-- content beg -->
<!--
<p><a href="#Highlights">What's New ? </a>| <ahref="#Specificat">Specifications</a> | <a></a><a href="#Getting">GettingHelp</a>| <a href="#Players">TT Players</a> | <a></a><a href="#authoring">TTAuthoring Tools</a>|<a href="#demos"> Demos</a> |<a href="#Background">Background</a> | <a href="#Accessibil">Accessibility </a>| <ahref="#news">Past News</a> | <ahref="http://lists.w3.org/Archives/Public/public-tt/">Public Mailing ListArchive </a>| <a href="#Minutes">Minutes</a> | <a href="Group">Timed-TextWG.</a></p>-->
<h2 class="break">Mission</h2>
<div style="float: right; margin: 2em 0 0 1em; width:20em; clear:both;">
<table summary="This table has 1 row" style="float: right; margin: 0 0 0 1em; width:20em;font-size: .9em; text-align:left;">
<thead>
<tr>
<th rowspan="1" colspan="1" style="text-align:center;"><strong>Nearby</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="1" colspan="1">
<ul style="list-style-type: square;">
<li>Mailing list archives: <a href="https://lists.w3.org/Archives/Public/public-tt/">public-tt</a>
| (<a href="mailto:[email protected]?subject=subscribe">subscribe</a>)</li>
<li><a href="https://www.w3.org/AudioVideo/TT/tracker/">Issue/Action
Tracker</a></li>
<li><a href="https://www.w3.org/AudioVideo/TT/board/" class="external text"
rel="nofollow">TTWG Dashboard issues</a></li>
<li><a href="https://www.w3.org/PM/Groups/chairboard.html?gid=34314">Chair dashboard</a></li>
<li><a href="https://www.w3.org/wiki/TimedText">Wiki</a></li>
<li><a href="https://www.w3.org/groups/wg/timed-text/publications">Publications</a></li>
<li><a href="https://www.w3.org/2023/04/timed-text-wg-charter.html">Charter</a></li>
<li><a href="https://www.w3.org/groups/wg/timed-text/participants"><span
style="color: #0000ee;"><span style="text-decoration: underline;">TTWG
Participants</span></span></a><br />
</li>
<li><a href="https://www.w3.org/groups/wg/timed-text">WG Information</a></li>
<li><a href="https://www.w3.org/PM/Groups/agenda.html?gid=34314">Upcoming Agenda</a></li>
<!--
<li><a href="https://www.w3.org/2002/09/wbs/34314/">Open polls and questionnaires</a></li> -->
</ul>
</td>
</tr>
</tbody>
</table>
</div>
<p class="mission">The <strong>mission</strong> of the <a href="https://www.w3.org/AudioVideo/TT/">Timed
Text Working Group</a> is to develop W3C Recommendations for media
online captioning by developing and maintaining new versions of the
Timed Text Markup Language (TTML) and WebVTT (Web Video Text Tracks)
based on implementation experience and interoperability feedback, and
the creation of semantic mappings between those languages.</p>
<!--
<h2 id="docs" class="break">Timed text WG activities</h2>
Refer to the <a href="https://www.w3.org/wiki/TimedText"><span style="font-weight: bold;">TTWG
wiki</span></a> to learn more about the TTWG Working group <span id="Timed_Text_Efforts_and_Specifications"
class="mw-headline">Efforts and Specifications, Documentations,
Implementations experience, meetings and F2F meetings.<br />
</span><br />
Introduction to <a href="https://www.w3.org/AudioVideo/TT/docs/TTML-Profiles.html">Captioning
Formats, TTML derivatives and WebVTT formats.</a>
<h3><span id="Timed_Text_Registry" class="mw-headline">Timed Text Registry</span></h3>
<p><a href="https://www.w3.org/TR/ttml-profile-registry/">TTML Media Type
Definition and Profile Registry</a></p>
<h3><span id="Timed_Text_Efforts_and_Specifications" class="mw-headline">Timed
Text Publications<br />
</span></h3>
<p>See the <a href="https://www.w3.org/wiki/TimedText/Publications">publication
dashboard.</a></p>
<h3><span id="Timed_Text_Efforts_and_Specifications" class="mw-headline">Timed
Text Issues Tracker</span></h3>
<p>see the<a href="https://www.w3.org/AudioVideo/TT/board/" class="external text"
rel="nofollow"> TTWG Dashboard issues/pull requests</a> from github.<br />
</p>
<p><br />
</p>
<h2 class="break" id="testsuite">Test Suite</h2>
<p>For TTML, we worked on a test suite:</p>
<ul>
<li>the <a href="https://www.w3.org/2008/10/dfxp-testsuite.zip">set of
tests (zip file)</a>.</li>
<li>the <a href="https://www.w3.org/2008/10/dfxp-test-coverage.html">coverage
report of the test suite</a>.</li>
<li>the <a href="https://www.w3.org/2009/05/dfxp-results.html">implementation
spreadsheet</a>.</li>
<li>the <a href="https://www.w3.org/2008/12/dfxp-testsuite/web-framework/START.html">Web
framework</a> to test existing presentation implementations in your
Web browser.</li>
<li>the <a href="http://dev.w3.org/cvsweb/2008/tt/testsuite/">CVS
repository</a> where everything comes from.</li>
</ul>
<!-- h2 class="break" id="demos">Demonstrations</h2>
<ul> <li><a href="/2009/02/ThisIsCoffee.html">DFXP with caffeine</a>: this (old) demo requires a browser that supports the HTML 5 video element, its Media API, and the Ogg or MPEG-4 video codecs.</li> <li>@@put here a demo for WebVTT</li> </ul> <h2 class="break" id="records">Meeting records</h2> <p>Search for <a href="https://www.w3.org/Search/Mail/Public/search?keywords=&hdr-1-name=subject&hdr-1-query=minutes&index-grp=Public__FULL&index-type=t&type-index=public-tt">minutesin the mailing list archive</a>. </p> <p>See also the previous records:</p> <ul> <li><a href="minutes.html#tel-minutes">Telecon Minutes</a></li> <li><a href="minutes.html#f2f-minutes">Face to Face Meeting Minutes</a></li> </ul -->
<h2 id="cepc">Code of Ethics and Professional Conduct</h2>
<p>The <a href="https://www.w3.org/Consortium/cepc/">W3C Code of Ethics
and Professional Conduct</a> applies to all TTWG work.</p>
<h2 class="break" id="lists">Discussion lists</h2>
<p>Technical discussion takes place on GitHub repository issues and pull
requests and on the Working Group discussion list,
[email protected] (<a href="http://lists.w3.org/Archives/Public/public-tt/">archive</a>).
This is a public mailing list; to <a href="mailto:[email protected]?subject=subscribe">subscribe
to the public-tt mailing list</a>, please check the <a href="../../../Mail/Request">subscription
procedure</a>.</p>
<form method="get" action="https://www.w3.org/Search/Mail/Public/search">
<p>Search the archive <input name="type-index" value="public-tt" type="hidden" /><input
name="index-type" value="t" type="hidden" /> <input size="42" name="keywords"
maxlength="100" value="" type="text" /> <input value="Search" name="search"
type="submit" /> <a href="https://www.w3.org/2002/02/mail-search-help" class="search">help</a></p>
</form>
<h2 class="break" id="wiki">Wiki and Timed Text Resources</h2>
<p>The TTWG also maintains the <a href="https://www.w3.org/wiki/TimedText">
Timed Text wiki</a> which includes a list of the TTWG's
<a href="https://www.w3.org/wiki/TimedText/Publications">publications</a> and a list of <a href="https://www.w3.org/wiki/TimedText/EffortsAndSpecifications">known implementations, resources and specifications</a>.</p>
<!--h2 class="break"><a name="Background">Background/Historical</a></h2>
<ul> <li><a href="https://www.w3.org/AudioVideo/timetext.html">Timed-Text initial requirement document draft</a> (edited by the <a href="http://lists.w3.org/Archives/Public/www-tt-tf/">Timed-Text Task Force</a>)</li> <li><a href="https://www.w3.org/2003/01/Timed-text-Patent-statements.html">Previous Timed-Text IPR public page</a></li> <li><a href="https://www.w3.org/AudioVideo/timetext.html">Timed-Text Requirements document initial draft</a> (edited by the <a href="http://lists.w3.org/Archives/Public/www-tt-tf/">Timed-Text task force</a>)</li> <li><a href="https://www.w3.org/AudioVideo/TT/Group/">W3C Timed-Text Working Group</a> (<a href="https://www.w3.org/Help/AccessForm">members only</a>)</li> <li>Timed-Text task force list <a href="mailto:[email protected]">[email protected]</a> (<a href="http://lists.w3.org/Archives/Public/www-tt-tf/">archives</a>)</li> <li><a href="/AudioVideo/Group/TT-activity.html">Timed-Text Activity Proposal</a> (<a href="https://www.w3.org/Help/AccessForm">members only</a>)</li> </ul -->
<!--
<h2>Tutorials</h2><ul> <li><a href="http://audio-video-images.indelv.com/timed-text-the-basics.html">What is Timed Text?</a></li></ul>-->
<h2 id="meetings">Meetings</h2>
<p>Meetings are held at 1600 UTC (winter time, where it applies) weekly on
Thursdays, duration 1 hour. By exception 2 hour meetings may be scheduled,
beginning at 1500 UTC. In summer time, meetings begin 1 hour earlier in UTC time.</p>
<p>Upcoming meetings are visible at the
<a href="https://github.com/w3c/ttwg/projects/1">TTWG project dashboard</a>.</p>
<h2 id="recent-activity">Recent Activity and list of repositories</h2>
<p>
All of the TTWG's repositories can be found at <a href="https://www.w3.org/PM/Groups/repositories.html?gid=34314">Timed Text Working Group - Repositories</a> page.
Recent activity on the repositories where work is active at the moment can be found on the following repository links:
</p>
<h3>Group repositories</h3>
<ul>
<li><a href="https://github.com/w3c/ttwg/pulse">TTWG business</a></li>
<li><a href="https://github.com/w3c/tt-reqs/pulse">TTWG future requirements</a></li>
</ul>
<h3>Recommendation Track specification repositories</h3>
<ul>
<li><a href="https://github.com/w3c/imsc/pulse">IMSC</a></li>
<li><a href="https://github.com/w3c/imsc-hrm/pulse">IMSC Hypothetical Render Model (HRM)</a></li>
<li><a href="https://github.com/w3c/ttml1/pulse">TTML1</a></li>
<li><a href="https://github.com/w3c/ttml2/pulse">TTML2</a></li>
<li><a href="https://github.com/w3c/webvtt/pulse">WebVTT</a></li>
<li><a href="https://github.com/w3c/dapt/pulse">Dubbing and Audio description Profiles of TTML2 (DAPT)</a></li>
<li><a href="https://github.com/w3c/tt-module-cjk-ext-1/pulse">TTML CJK Extension Module 1</a></li>
<li><a href="https://github.com/w3c/tt-module-css/pulse">TTML CSS Extension Module</a> <span class="small">(not currently actively being worked on)</span></li>
<li><a href="https://github.com/w3c/tt-module-karaoke/pulse">TTML Karaoke Extension Module</a></li>
<li><a href="https://github.com/w3c/tt-module-live/pulse">TTML Live Extension Module</a> <span class="small">(also includes WebSocket carriage mechanism and guide)</span></li>
<li><a href="https://github.com/w3c/tt-module-vr/pulse">TTML VR Extension Module</a> <span class="small">(not currently actively being worked on)</span></li>
</ul>
<h3>Test repositories</h3>
<ul>
<li><a href="https://github.com/w3c/imsc-tests/pulse">IMSC Tests</a></li>
<li><a href="https://github.com/w3c/imsc-hrm-tests/pulse">IMSC Hypothetical Render Model (HRM) Tests</a></li>
<li><a href="https://github.com/w3c/IMSC-1.0.1_Text_TestContent/pulse">Test contents for IMSC 1.0.1 Text</a></li>
<li><a href="https://github.com/w3c/IMSC-1.1_Text_TestContent/pulse">Test contents for IMSC 1.1 Text</a></li>
<li><a href="https://github.com/w3c/IMSC-1.1_Image_TestContent/pulse">Test contents for IMSC 1.1 Image</a></li>
<li><a href="https://github.com/w3c/ttml1-tests/pulse">TTML1 tests</a></li>
<li><a href="https://github.com/w3c/ttml2-tests/pulse">TTML2 tests</a></li>
<li><a href="https://github.com/web-platform-tests/wpt/tree/master/webvtt">WebVTT tests<a> (on Web Platform Tests)</li>
</ul>
<h3>Working Group Notes, registries etc</h3>
<ul>
<li><a href="https://github.com/w3c/imsc-vnext-reqs/pulse">IMSC vNext Requirements</a></li>
<li><a href="https://github.com/w3c/png-hdr-pq/pulse">PQ HDR in PNG</a></li>
<li><a href="https://github.com/w3c/tt-profile-registry/pulse">TTML Profile Registry</a></li>
<li><a href="https://github.com/w3c/ttml-webvtt-mapping/pulse">TTML to WebVTT mapping</a></li>
<li><a href="https://github.com/w3c/dapt-reqs/pulse">Requirements for the Dubbing and Audio description Profiles of TTML2 (DAPT)</a></li>
</ul>
<h3>Suspended Recommendation Track specification repositories</h3>
<ul>
<li><a href="https://github.com/w3c/ttml3/pulse">TTML3</a></li>
<li><a href="https://github.com/w3c/adpt/pulse">ADPT</a></li>
</ul>
<h2 id="join">How to join the group</h2>
<p>This group operates under the <a href="https://www.w3.org/Consortium/Patent-Policy-20200915/">W3C
Patent Policy</a>, which ensures that specifications published by the
group can be implemented on a royalty-free (RF) basis. To record
agreement from all participants with that W3C Patent Policy, joining the
group involves completing several steps:</p>
<ul>
<li> If you're affiliated with a <a href="https://www.w3.org/Consortium/Member/List">W3C
member organization</a>
<ol>
<li>Use the <a href="https://www.w3.org/accounts/request">form
for getting a W3C account</a></li>
<li>Have your <a href="https://www.w3.org/Member/ACList">AC
representative</a> nominate you using the <a href="https://www.w3.org/groups/wg/timed-text/join">form
for joining this Working Group</a>.</li>
</ol>
</li>
<li>Subject to approval from the Working Group Chairs and Team Contacts,
we also accept <a href="https://www.w3.org/Consortium/Process/#invited-expert-wg">Invited
Experts</a>.</li>
</ul>
<p>When you join, you will be added to <a href="http://lists.w3.org/Archives/Public/public-tt/">public-tt</a>,
the publicly archived mailing-list for the group. </p>
<div id="footer">
<address> Nigel Megitt, Gary Katsevman, Chairs<br />
Atsushi Shimono, W3C Team contact<br />
<small>$Date: 2019/12/04 10:59:09 $</small> </address>
</div>
<!-- footer end --> </div>
</body></html>