See also: IRC log
<plh> trackbot, start telcon
<trackbot> Meeting: Timed Text Working Group Teleconference
<trackbot> Date: 07 March 2013
<plh> Chair: Monica J. Martin, Philippe Le Hegaret
<glenn> calling in now
<plh> Andreas: [lots of folks from EBU]
<plh> scribe: plh
Monica: we'll have a short meeting
<EBU> EBU Meeting: Matt Simpson (Red Bee Media), John Birch (Screen Subtitling), Frans de Jong (EBU), Nigel Megitt (BBC), Andreas Tai (IRT), Martin Schmalohr (IRT), Peter tho Pesch (IRT), Reinhard Möller (Zeitanker)
Glenn: I reviewed the text
proposed by Mike, and will be able to add it this week
... and will get a new draft after
Monica: we had a lengthy with discussion followning the issue from Netflix
<glenn> have received proposed text from MD to add informative note in 1.0SE that suggests an interim approach to specifying (storage) aspect ratio
<glenn> i expect to add this text to the 1.0SE ED this week for further review by the group
Monica: the text hasn't come to
the list yet
... this is related to issue-156, action item-148
<mmartin3> good morning
<glenn> Note:
<glenn> It can be beneficial to presentation processors to signal the authorial layout intentions for aspect ratio consistent with the semantics of CEA-708-D, section 4.5 “Caption Service Metadata”, “ASPECT RATIO”. This can be implemented with external namespace metadata, such as “m708:aspectRatio” as defined in SMPTE 2052-11, Section 5.4.4.
Glenn: the text is clearer on
which aspect ratio is referred to
... might need to fine tune the text
Monica: we want to make it clear that the text is targetted to the presentation processor rather than the author
<glenn> i may need to alter this text to make clear this is storage aspect ratio (SAR), and not pixel aspect ratio (PAR) or display aspect ratio (DAR)
Monica: this is not normative
text, just guidance
... due to constraint in SE
Philippe: so the changes would be more substantial in 1.1?
Glenn: correct, we'll have to introduce new vocabulary
<mmartin3> Issue-201
<trackbot> ISSUE-201 -- How to specify aspect ratio to understand positioning that may apply for display or video. -- open
<trackbot> http://www.w3.org/AudioVideo/TT/tracker/issues/201
Monica: and that's a small part of issue-201
Glenn: keep action-148 open for now
Monica: let's formalize this over the week
andreas: we published new updates around our TTML mappings
<nigelmegitt> EBU-TT part 1: http://tech.ebu.ch/docs/tech/tech3350.pdf
Andreas: what's the status on the TTML side?
Monica: thank you for joining us.
we made quite a bit of progress.
... to advance SDP-US
... the Note is now posted in the W3C site
http://www.w3.org/TR/ttml10-sdp-us/
scribe: we worked with Andreas to
facilitate the mapping on the EBU side
... Glenn, any issue we need to bring up?
Glenn: nope
<glenn> i'm open to answer any specific questions
Philippe: we can focus on the 1.0 SE and finish since SDP-US is behind now
Andreas: we're glad to continue participating
<inserted> scribe: mmartin3
plh: Finalize spec. May move to
Recommendation.
... No timeline
... Apply to HTML5.
glenn: Is the worked focused on text track API or in WebVTT to support FCC captioning requirements for rollup, painton and popup.
plh: There is an extension to text track interface.
glenn: Use of JavaScript - how used with content stream? Injected, interact with external web page? Don't know how to inject JavaScript? Security issues may arise.
plh: Discuss relationship between WebVTT and TTML.
glenn: Bug filed to WebKit to add
TTML support.
... WebKit developer opposed because of WebVTT.
... IE10 has support for TTML.
... Input to encourage other agents to support TTML
directly.
... View authoring rather than distribution.
... Misunderstanding on how TTML uses XSL-FO to describe
formatting semantics.
... XSL-FO processor is not required.
... Add SE section to describe format model that uses HTML5 and
CSS. Second alternative description of TTML formatting
semantics.
... Help encourage understanding of use of TTML.
plh: May be significant
work.
... Publish as Working Group Note on the side.
glenn: Will send a proposal to
the list.
... If we map TTML to text track objects, we need to explain
how to translate HTML5.
plh: We have a Note identified in Charter.
mmartin3: Was going to say that.
glenn: Add informative Annex in SE.
plh: Formatting item may not be sufficient.
mjordan: IE has WebVTT
support.
... Should we map to HTML5 or to WebVTT?
glenn: Effective to translate
into WebVTT.
... Add native support for TTML in user agents.
... Support TTML movie house commitments.
mjordan: WebVTT is being rendered in HTML5 in DOM. Can we use a similar focus? Your proposal provides a translation which may be appropriate.
glenn: Synchronic Flow Processing
in TTML 1.0.
... Map synchronic documents to XSL-FO. Do similar description
to HTML5. CSS.
<plh> Monica: Sean has done some mapping already, will provide a link
<plh> ... IE supports both WebVTT and TTML
glenn: IE supports both WebVTT and TTML. TTWG has made significant progress.
<plh> Plh: nothing concrete
at this time. if something comes up, I'll come back here
...andreas: Much discussion in our community.
... Will make proposals when our views are more concrete.
... Difficult to parse how to use XSL-FO.
<plh> ACTION: plh to update the Working Group page [recorded in http://www.w3.org/2013/03/07-tt-minutes.html#action01]
<trackbot> Created ACTION-150 - Update the Working Group page [on Philippe Le Hégaret - due 2013-03-14].
trackbot, end meeting
This is scribe.perl Revision: 1.137 of Date: 2012/09/20 20:19:01 Check for newer version at http://dev.w3.org/cvsweb/~checkout~/2002/scribe/ Guessing input format: RRSAgent_Text_Format (score 1.00) Succeeded: s/Andreas, Pierre/Pierre/ Succeeded: i/plh: Finalize spec/scribe: mmartin3 Found Scribe: plh Inferring ScribeNick: plh Found Scribe: mmartin3 Inferring ScribeNick: mmartin3 Scribes: plh, mmartin3 ScribeNicks: plh, mmartin3 Default Present: +49.893.aaaa, Plh, glenn, Andreas, Monica, Michael_Jordan Present: +49.893.aaaa Plh glenn Andreas Monica Michael_Jordan Regrets: Sean Michael_D Pierre Frans Found Date: 07 Mar 2013 Guessing minutes URL: http://www.w3.org/2013/03/07-tt-minutes.html People with action items: plh[End of scribe.perl diagnostic output]