- From: Nigel Megitt <nigel.megitt@bbc.co.uk>
- Date: Thu, 29 May 2014 15:01:53 +0000
- To: Timed Text Working Group <public-tt@w3.org>
- Message-ID: <CFAD0A0E.1E7DA%nigel.megitt@bbc.co.uk>
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?
<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]
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Received on Thursday, 29 May 2014 15:02:27 UTC