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Explore TTML, WebVTT, and their evolution as standards for subtitles and captions in web and TV content. Learn about TTML 1.0, 2.0, SMPTE-TT, EBU-TT-D, CFF-TT, and more. Discover strategies, mappings, and future developments in subtitle formats.
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Web-Distribution FormatsFor Subtitles & Captions Web & TV Workshop, 12/13.3. Andreas Tai, Institut für Rundfunktechnik
TTML & WebVTT
<p begin="00:00:00.000" end="00:00:02.000" • xmlns="http://www.w3.org/ns/ttml"> • This is a subtitle<br/> • on two lines • </p>
Status TTML 1.0, 2nd Edition Next TTML 2.0
DVB HbbTV SMPTE-TT EBU-TT-D CFF-TT
SMPTE-TT TTML CFF-TT EBU-TT-D
00:00:00.000 --> 00:00:02.000 This is a subtitle on two lines
Web Media Text Tracks Community Group
Status Draft Community Specification Next W3C Rec Track
TTWG TTML WebVTT
Consensus Input Timed Text Task Force of the Web & TV IG
3 Strategies Mappings One single Spec Clients support TTML & WebVTT
Exception + TTML (SDP-US)
Future HbbTV 2.0 Devices + TTML with Profile EBU-TT-D
Other Web Browsers WebVTT Only
Other Web Browsers WebVTT Welcome TTML Welcome
Thankyouforyourattention! Andreas Tai Production Systems Television Institut für Rundfunktechnik Floriansmühlstraße 60 80939 München Tel. +49-(0)89-32399-0 Fax +49-(0)89-32399-351 E-Mail: tai@irt.de