Timed Text Working Group Teleconference -- 10 Jul 2014

<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: https://www.w3.org/2002/09/wbs/34314/TTWG_Geneva_F2F_Planning/

nigel: agenda and wiki page is at 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> 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> 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> 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> 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

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

- DRAFT -

Timed Text Working Group Teleconference

10 Jul 2014

Attendees

Contents

Geneva F2F

Issues

Summary of Action Items

Scribe.perl diagnostic output