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Developments in the TTML WG Sean Hayes - Microsoft. W3C TTWG chair.

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Presentation on theme: "Developments in the TTML WG Sean Hayes - Microsoft. W3C TTWG chair."— Presentation transcript:

1 Developments in the TTML WG Sean Hayes - Microsoft. W3C TTWG chair

2 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · Activities. Re-chartered group –New participants – more welcome! –Liaisons - SMPTE, EBU, MPEG SDP –Constrained profile Second Edition –Bug fixes TTML 1.1 –New features based on field experience Timeline

3 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · Charter Mission of the Timed Text Working Group: –to develop W3C Recommendations for media online captioning by maintaining and developing new versions of the Timed Text Markup Language (TTML) – to Nov Activities and deliverables –Second Edition TTML 1.0 Recommendation; –A simple constrained profile for delivery of closed captions for video content –Recommendation for a new Timed Text Markup Language (TTML) 1.1 specification to include. A Technical Report on the application of TTML in HTML5 Description of TTML intermediate synchronic document as HTML5. Description of TTML presentation syntax and semantics relating to CSS3. A Technical Report on the application of TTML in live production and streaming.

4 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · SDP-US The Simple Online Delivery (US) profile is focused on streamlined delivery of closed captions on the Internet. –support core TTML features to deliver content originating from legacy formats such as CEA-608 and -708 content, –targeted primarily for delivery in US markets. 3 guiding principles for online delivery of closed captions originated in the United States: –Promote interoperability. –Provide mandatory functionality based on a specified set of TTML features. –Constraints on usage of a specified set of TTML features. Key input from SMPTE 24B In time to support new FCC rules

5 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · Second Edition Fixing errata. –Clarify timebases and SMPTE marker mode Profile behaviour Scrolling behaviour –Editorial cleanup and additional examples Avoides conformance changes Latest version: –http://dvcs.w3.org/hg/ttml/raw-file/tip/ttml10/spec/ttaf1-dfxp.html

6 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · TTML 1.1 Key agreed changes so far –Free positioned paragraphs –Named animations –Padding and margin support for centered flush left captions. Features under consideration –Holdovers from 1.0 work Ruby, I18n improvements, 708 mapping –Issues arising from SMPTE and EBU work. Background images. Additional font and outline styles. –Issues for consideration: 3D positioning. Smooth animations (e.g fade), forced display, spacing control

7 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · Examples

8 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · Timeline DeliverableLCNoteCRPERPRRec Timed Text Markup Language (TTML) 1.0 (Second Edition) November 2012 Simple Delivery Profile for Closed Captions Note September 2012 TTML in HTML 5 Note November 2012 TTML Live Update Note November 2012 February 2013 Timed Text Markup Language (TTML) 1.1 February 2013May 2013August 2013 September 2013

9 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition · QA

10 © 2012 SMPTE · The 2012 Annual Technical Conference & Exhibition ·


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