- From: Michael A. Dolan <miked@tbt.com>
- Date: Wed, 23 Jan 2002 10:04:28 -0800
- To: www-tt-tf@w3.org
Philipp thought this note may be of interest to this list. >Date: Wed, 23 Jan 2002 07:12:25 -0800 >To: Philipp Hoschka <ph@w3.org> >From: "Michael A. Dolan" <miked@tbt.com> >Subject: Re: [Fwd: Timed Text work] > >Philipp- > >Both Europe and the US have had captioning and teletext standards for >television for quite some time. These are old, binary encodings (and >obviously not XML-based). The US standards are EIA-608 and EIA-708. The >European standards are in ITU documents I believe, but don't recall them >off the top of my head (could find them if someone cares). > >DVD captioning systems have yet another format, although I am not aware of >the exact standard that covers this or what the encoding is exactly. I >know a person closely involved in DVD standards - if someone cares, I >could inquire. > >SMPTE DDE-1 can be used for this purpose with its triggers >(application/tve-trigger), but is a bit heavy weight for just "timed >text". There were some advanced captioning prototypes developed by WGBH >(public television in Boston) that used DDE-1 to do some really >interesting captioning applications. > >There are proprietary XML-based solutions in use today by the commercial >producers of captioning. As far as I know, they have not published their >work, but may do so if encouraged. > >And, the emerging Digital Cinema market is off defining something new and >re-inventing captioning for that market. I have not kept up with their >work, but understand it is proceeding in parallel. I can inquire here as well. > >IETF AVT-WG has had some activity on this topic. There was an ID >(draft-westerlund-avt-rtp-static-media-00.txt), but you should contact the >AVT chair for where this activity stands. > >So, the answer is yes, many times now, and it would sure be a shame to >create yet another effort. All these overlap in varying degrees, but the >closest direct hit is the XML-based proprietary systems in use by the >commercial captioning companies (WGBH Caption Center and SDI Media are two). > >SMPTE D27 would be very interested in this work, so I would like to remain >informed in detail of W3C's activity in this area. Where is this WG >organized relative to the reports made in the HTML-CG? > >Regards, > > Mike > > >At 03:13 PM 1/23/2002 +0100, Philipp Hoschka wrote: >>Mike, >> >>do you know any existing effort in that area in another standards >>body ? >> >>Thx >> >>-PhilippReturn-Path: <www-smil-request@w3.org> >>Received: from sophia.inria.fr by www45.inria.fr (8.11.6/8.10.0) with >>ESMTP id g0G9px721797; Wed, 16 Jan 2002 10:51:59 +0100 (MET) >>Received: from tux.w3.org by sophia.inria.fr (8.11.6/8.10.0) with ESMTP >>id g0G9pvS12361; Wed, 16 Jan 2002 10:51:57 +0100 (MET) >>Received: from www19.w3.org (www19.w3.org [18.29.0.19]) >> by tux.w3.org (8.9.3/8.9.3) with ESMTP id EAA24331; >> Wed, 16 Jan 2002 04:51:56 -0500 >>Received: (from daemon@localhost) >> by www19.w3.org (8.9.0/8.9.0) id EAA11196; >> Wed, 16 Jan 2002 04:43:02 -0500 (EST) >>Resent-Date: Wed, 16 Jan 2002 04:43:02 -0500 (EST) >>Resent-Message-Id: <200201160943.EAA11196@www19.w3.org> >>Received: from tux.w3.org (tux.w3.org [18.29.0.27]) >> by www19.w3.org (8.9.0/8.9.0) with ESMTP id EAA10890 >> for <www-smil@www19.w3.org>; Wed, 16 Jan 2002 04:40:26 -0500 (EST) >>Received: from zidane.inria.fr (IDENT:root@zidane.inria.fr [138.96.10.33]) >> by tux.w3.org (8.9.3/8.9.3) with ESMTP id EAA23059; >> Wed, 16 Jan 2002 04:40:21 -0500 >>Received: from zidane.inria.fr by zidane.inria.fr (8.11.6/8.10.0) with >>ESMTP id g0G9eKT16475; Wed, 16 Jan 2002 10:40:20 +0100 >>Message-Id: <200201160940.g0G9eKT16475@zidane.inria.fr> >>From: Daniel Dardailler <danield@w3.org> >>Reply-To: dd@w3.org >>To: www-smil@w3.org, www-html@w3.org, www-style@w3.org, www-svg@w3.org, >> w3c-wai-ig@w3.org, wai-xtech@w3.org, www-tt-tf@w3.org >>Date: Wed, 16 Jan 2002 10:40:20 +0100 >>Subject: Timed Text work >>Resent-From: www-smil@w3.org >>X-Mailing-List: <www-smil@w3.org> archive/latest/968 >>X-Loop: www-smil@w3.org >>Sender: www-smil-request@w3.org >>Resent-Sender: www-smil-request@w3.org >>Precedence: list >>List-Id: <www-smil.w3.org> >>List-Help: <http://www.w3.org/Mail/> >>List-Unsubscribe: <mailto:www-smil-request@w3.org?subject=unsubscribe> >>X-Mozilla-Status2: 00000000 >>MIME-Version: 1.0 >> >> >>Hello all, >>(sorry in advance for the large distribution, but I really feel all the >>recipient fora are potentially interested) >> >>This message to let you know that the WAI technical activity, thru its >>CG, has created a task force to discuss the creation of a new WG to >>develop a XML based Timed Text format. >> >>TT for short - and for now - is basically a captioning format used to >>synchronize a text stream with some other timed media, like audio or >>video. >>e.g. >> >> <text begin="2s" end="4s">That's him, Dude.</text> >> <text begin="6s" end="8s">And a good day to you, sir.</text> >> (syntax not binding; missing a bunch of layout/rate controls) >> >>The name of the list is >> >> www-tt-tf@w3.org >> >> (initials stand for Public Timed Text Task Force mailing list >> and www-tt-tf-request@w3.org is up for auto subscribe) >> >>This list is *not* the TT working group list yet (since the WG is not >>formed yet), so it's not a place to discuss elements and attributes >>semantics and syntax and start drafting specs. >> >>It's a list to scope the work, existing formats, identify core >>participants (chair, staff contact, content provider, software >>developers, etc), plan the deliverables, refine the requirements (in >>particular in the area of reutilisation of existing W3C XML modules of >>XHTML, SMIL, SVG, etc), come up with a draft charter, identify the W3C >>domain and activity that could potentially host the WG (as we're more >>and more convinced it's not just an accessibility item), etc. >> >>If you want to know more about it, there's a draft requirement >>document at >> http://www.w3.org/AudioVideo/Group/timetext.html >>and you can also look at the RealText or the SAMI specs. > >----------------------------------------------------------------------------------- >Michael A. Dolan, Chair SMPTE D27 DDE AHG, S22 SID AHG >619-445-9070 FAX 208-545-6564 >PO Box 1673 Alpine, CA 91903 USA
Received on Wednesday, 23 January 2002 13:06:26 UTC