- From: Glenn Adams <glenn@skynav.com>
- Date: Fri, 30 May 2014 09:07:45 +0800
- To: Nigel Megitt <nigel.megitt@bbc.co.uk>
- Cc: Timed Text Working Group <public-tt@w3.org>
- Message-ID: <CACQ=j+eXo46PVmuZZVrm7RN4Lq08-aGH0+=uzx3WyjhR9RgeJg@mail.gmail.com>
couple of comments inline On Thu, May 29, 2014 at 11:01 PM, Nigel Megitt <nigel.megitt@bbc.co.uk> wrote: > Minutes available at: http://www.w3.org/2014/05/29-tt-minutes.html > > > [1]W3C > > [1] http://www.w3.org/ > > - DRAFT - > > Timed Text Working Group Teleconference > > 29 May 2014 > > See also: [2]IRC log > > [2] http://www.w3.org/2014/05/29-tt-irc > > Attendees > > Present > pal, mike, nigel, jdsmith > > Regrets > Frans, de, Jong > > Chair > nigel > > Scribe > nigel > > Contents > > * [3]Topics > 1. [4]IMSC Issues raised > 2. [5]F2F In Geneva > * [6]Summary of Action Items > __________________________________________________________ > > <trackbot> Date: 29 May 2014 > > <scribe> scribeNick: nigel > > IMSC Issues raised > > issue-320? > > <trackbot> issue-320 -- Is normative SMPTE 2052 reference okay? > -- raised > > <trackbot> > [7]http://www.w3.org/AudioVideo/TT/tracker/issues/320 > > [7] http://www.w3.org/AudioVideo/TT/tracker/issues/320 > > nigel: 3 main concerns: licensing, quality of specification and > structural references. > > pal: SMPTE has requested that we add backgroundImage to TTML2 > so we can move to that definition in IMSC2 > > nigel: We can define backgroundImage in IMSC1 and then port it > into TTML2 and make the namespace change now rather than in > IMSC2. > > pal: Rather than guessing what the TTML2 solution will be now > we would be able to move more quickly if we reference the > SMPTE-TT definition and then update IMSC 2 when the TTML 2 > feature has been agreed. > ... We could guess wrong and end up with 3 approaches instead > of 2! > > nigel: That leaves the second concern of precision in terms of > 2052-1 feature definition. > > mike: If there is a gap then we can simply add the gaps to > IMSC1. > ... If there are any areas that are unclear in 2052-1 we should > a) communicate them to SMPTE and b) clarify it for our > purposes. > > pal: I don't have a concern with smpte:backgroundImage but > we'll address it when we find one. > > nigel: I've set this issue to Pending Review and added a note > for the approach we plan to take. > > issue-312? > > <trackbot> issue-312 -- forcedDisplay attribute is metadata so > should be in ttm not tts namespace -- open > > <trackbot> > [8]http://www.w3.org/AudioVideo/TT/tracker/issues/312 > > [8] http://www.w3.org/AudioVideo/TT/tracker/issues/312 > > nigel: I raised this due to the wording in the current draft of > IMSC 1 > > pal: Forced subtitles are those which are displayed regardless > of the user's preference to display or hide subtitles. An > example is translated subtitles in the Avatar film. > ... The idea is to deliver a single document that will work for > both the standard subtitle use case and the forced case, and > for the presentation to be dependent on the user preference. > > mike: In the context of a media file it's not simple to select > multiple TTML documents simultaneously so what's forced or not > forced needs to be in the same document. > ... Even when the subtitle track is not selected to be visible > then the decoder should present the forced subtitles on the > screen. The use case also includes translations of signs > visible in video in foreign languages. > ... Clearly we need more definition of the semantics of this > attribute. > > nigel: We have two change proposals that can provide for this > feature, which would result in changes in TTML2 > > pal: My proposal would be to adopt the current mechanism and > then switch in IMSC 2 dependent on TTML2. > > mike: concurs with pal. > > nigel: The forcedDisplay mode is currently in the ttml > namespace, yes? > > pal: It is, because I could not reference the DECE namespace. > One approach would be to define an IMSC1 specific namespaces, > or to keep in ttml namespaces and when we get to TTML2 > deprecate it or indicate 'don't use this'. > > mike: We can't extend the ttml namespace can we, without > modifying TTML1? > > we can only modify the ttml namespace(s) in TTML2 at this juncture; we can't add new features/extensions to TTML1; forcedDisplay could be defined in an IMSC specific extension namespace though; also, I would suggest that if a forcedDisplay signal is present in a document, there should also be a top-level metadata attribute (on tt element), such as usesForcedDisplay, that signals that forcedDisplay is used somewhere in the document. > > > <scribe> ACTION: pal Add wording to describe semantics of > forcedDisplay in IMSC 1 for ISSUE-312 [recorded in > [9]http://www.w3.org/2014/05/29-tt-minutes.html#action01] > > <trackbot> Created ACTION-292 - Add wording to describe > semantics of forceddisplay in imsc 1 for issue-312 [on > Pierre-Anthony Lemieux - due 2014-06-05]. > > <scribe> ACTION: pal Research appropriate namespace for > forcedDisplay feature in IMSC 1 for ISSUE-312 [recorded in > [10]http://www.w3.org/2014/05/29-tt-minutes.html#action02] > > <trackbot> Created ACTION-293 - Research appropriate namespace > for forceddisplay feature in imsc 1 for issue-312 [on > Pierre-Anthony Lemieux - due 2014-06-05]. > > F2F In Geneva > > <Dsinger_> 70 for 2 days > > <Dsinger_> I would say use canteen myself > > nigel: There will be a fee for food which needs to be agreed in > advance, 70 CHF for 2 days for a proper lunch. > ... we can choose to use this or use the canteen which is > cheaper and more basic, and doesn't offer a proper 'sit down > lunch'. > ... It's in the same place either way, but there's no advanced > planning needed to buy food in the canteen. The sit-down option > is more 'civilised' but takes longer. > > mike: Subject to it being in the same place on the top floor at > EBU I think we should go for the non-prepaid option. > > [11]https://www.w3.org/wiki/TimedText/geneva2014 > > [11] https://www.w3.org/wiki/TimedText/geneva2014 > > <scribe> ACTION: nigel Create a sign-up wbs survey for Geneva. > [recorded in > [12]http://www.w3.org/2014/05/29-tt-minutes.html#action03] > > <trackbot> Created ACTION-294 - Create a sign-up wbs survey for > geneva. [on Nigel Megitt - due 2014-06-05]. > > nigel: we need some WebVTT folk too. > > <scribe> ACTION: dsinger Socialise the Geneva F2F meeting > amongst the WebVTT community [recorded in > [13]http://www.w3.org/2014/05/29-tt-minutes.html#action04] > > <trackbot> Created ACTION-295 - Socialise the geneva f2f > meeting amongst the webvtt community [on David Singer - due > 2014-06-05]. > > <Dsinger_> Bye > > Summary of Action Items > > [NEW] ACTION: dsinger Socialise the Geneva F2F meeting amongst > the WebVTT community [recorded in > [14]http://www.w3.org/2014/05/29-tt-minutes.html#action04] > [NEW] ACTION: nigel Create a sign-up wbs survey for Geneva. > [recorded in > [15]http://www.w3.org/2014/05/29-tt-minutes.html#action03] > [NEW] ACTION: pal Add wording to describe semantics of > forcedDisplay in IMSC 1 for ISSUE-312 [recorded in > [16]http://www.w3.org/2014/05/29-tt-minutes.html#action01] > [NEW] ACTION: pal Research appropriate namespace for > forcedDisplay feature in IMSC 1 for ISSUE-312 [recorded in > [17]http://www.w3.org/2014/05/29-tt-minutes.html#action02] > > [End of minutes] > __________________________________________________________ > > > Minutes formatted by David Booth's [18]scribe.perl version > 1.138 ([19]CVS log) > $Date: 2014-05-29 14:59:15 $ > __________________________________________________________ > > [18] http://dev.w3.org/cvsweb/~checkout~/2002/scribe/scribedoc.htm > [19] http://dev.w3.org/cvsweb/2002/scribe/ > >
Received on Friday, 30 May 2014 01:08:33 UTC