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{minutes} TTWG Meeting 10/7/2014

From: Nigel Megitt <nigel.megitt@bbc.co.uk>
Date: Thu, 10 Jul 2014 15:14:31 +0000
To: TTWG <public-tt@w3.org>
Message-ID: <5941EAB8802D6745A7D363D7B37BD1F749AF8CED@BGB01XUD1012.national.core.bbc.co.uk>
Minutes available at http://www.w3.org/2014/07/10-tt-minutes.html


   [1]W3C

      [1] http://www.w3.org/

                               - DRAFT -

                Timed Text Working Group Teleconference

10 Jul 2014

   See also: [2]IRC log

      [2] http://www.w3.org/2014/07/10-tt-irc

Attendees

   Present
          Courtney_Kennedy, Jerry_Smith, Glenn_Adams,
          Pierre-Anthony_Lemieux, Nigel, Megitt, Plh

   Regrets
   Chair
          nigel

   Scribe
          nigel

Contents

     * [3]Topics
         1. [4]Geneva F2F
         2. [5]Issues
     * [6]Summary of Action Items
     __________________________________________________________

   <trackbot> Date: 10 July 2014

   <glenn__> trackbot, end meeting

   <trackbot> Meeting: Timed Text Working Group Teleconference

   <trackbot> Date: 10 July 2014

   <scribe> scribeNick: nigel

Geneva F2F

   Attendance survey:
   [7]https://www.w3.org/2002/09/wbs/34314/TTWG_Geneva_F2F_Plannin
   g/

      [7] https://www.w3.org/2002/09/wbs/34314/TTWG_Geneva_F2F_Planning/

   nigel: agenda and wiki page is at
   [8]https://www.w3.org/wiki/TimedText/geneva2014

      [8] https://www.w3.org/wiki/TimedText/geneva2014

   close action-294

   <trackbot> Closed action-294.

   nigel: Note that the survey is open to the Text Tracks
   Community Group too.
   ... We need to work out a working model since the expertise on
   WebVTT resides mainly in the TTCG even though there's a WebVTT
   Rec track in this group.

Issues

   issue-309?

   <trackbot> issue-309 -- Image profile needs to permit text
   equivalent -- pending review

   <trackbot>
   [9]http://www.w3.org/AudioVideo/TT/tracker/issues/309

      [9] http://www.w3.org/AudioVideo/TT/tracker/issues/309

   action-301?

   <trackbot> action-301 -- Philippe Le Hégaret to Contact w3c
   accessibility expert re issue-309 -- due 2014-06-26 -- OPEN

   <trackbot>
   [10]http://www.w3.org/AudioVideo/TT/tracker/actions/301

     [10] http://www.w3.org/AudioVideo/TT/tracker/actions/301

   plh: I talked to our accessibility expert and he's looking into
   it and will bring it to the media subgroup of the accessibility
   task force on Monday.

   <plh>
   [11]http://lists.w3.org/Archives/Public/public-html-a11y/2014Ju
   l/0009.html

     [11] http://lists.w3.org/Archives/Public/public-html-a11y/2014Jul/0009.html

   <plh> Media Sub-Group

   plh: above is the agenda for last week. He's going to include
   it in next agenda. Anyone interested in attending that call?
   10am US Eastern Time, 7am Pacific, 3pm UK time.

   pal: Participation from this group is necessary to represent
   the issue.
   ... I'm happy to participate and would like to know the agenda.

   plh: describes the topic [scribe misses details]. Will add pal
   and nigel to the agenda reception list.

   close action-301

   <trackbot> Closed action-301.

   nigel: There's been a lot of email discussion and proposed text
   on Issue-309 - I propose to address this after Monday's
   meeting.

   pal: I don't see much obstacle in adopting John's proposal.

   <tmichel> Hi, sorry I am really late ...

   <tmichel> was editing a document and miss the timing.

   <tmichel> yes and IRC bot does not work ..

   pal: The next step is for me to take a stab at editing the
   document today or tomorrow.

   issue-317?

   <trackbot> issue-317 -- IMSC should not require frame alignment
   -- open

   <trackbot>
   [12]http://www.w3.org/AudioVideo/TT/tracker/issues/317

     [12] http://www.w3.org/AudioVideo/TT/tracker/issues/317

   nigel: We seem to have a debate about the relative importance
   of quantising to encoded frames vs allowing the presentation
   processor to quantise as late as possible to display frames.
   ... has missed the debate for scribing due to technical issues

   [13]https://dvcs.w3.org/hg/ttml/raw-file/tip/ttml-ww-profiles/t
   tml-ww-profiles.html#synchronization

     [13] https://dvcs.w3.org/hg/ttml/raw-file/tip/ttml-ww-profiles/ttml-ww-profiles.html#synchronization

   glenn: on the 2nd sentence of synchronisation SHALL is not the
   right word - it's a definition rather than a mandate.
   ... Under Example 1 the sentence "If ttp:frameRate is
   specified, then the product of ttp:frameRate and
   ttp:frameRateMultiplier shall be the frame rate of the related
   video object."
   ... this does not say what the behaviour of the IMSC processor
   is if this condition is not met - fallback rules or 'abort
   processing' type rules should be specified.
   ... point 1 again: Instead of "A media time expression M shall
   correspond... " it should say "A media time expression M
   corresponds..."
   ... If we leave it to the implementation then the semantics are
   incomplete for processors. We have some generic language in
   TTML that may be relevant.

   pal: Okay I'll reuse that wording.
   ... I'll integrate John Birch's text in 309 and change the
   wording for 317 too and make a stab at showing that there's
   flexibility in terms of the related media object.

   <plh> regrets for next week

   <tmichel> bye.

   nigel: adjourns meeting

Summary of Action Items

   [End of minutes]
     __________________________________________________________


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--

Nigel Megitt
Lead Technologist, BBC Technology, Distribution & Archives
Telephone: +44 (0)208 0082360
Telephone (Lync): +44 (0)3030807996
Lync internal: 0807996
BC4 A3 Broadcast Centre, Media Village, 201 Wood Lane, London W12 7TP
Received on Thursday, 10 July 2014 15:15:02 UTC

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