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RE: Caption synchronization tolerance

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Tue, 28 Aug 2001 16:25:53 -0500
To: "'Charles F. Munat'" <chas@munat.com>, "'GLWAI Guidelines WG \(GL - WAI Guidelines WG\)'" <w3c-wai-gl@w3.org>
Cc: "'Larry Goldberg'" <larry_goldberg@wgbh.org>, <geoff_freed@wgbh.org>
Message-ID: <000901c13008$2fb75460$b2176880@trace.wisc.edu>
Yep - and that is done.

Places it doesn’t work are
1) live presentations
2) group presentations
3) presentations followed by other presentations in a timed window.
(e.g. a show which is followed by another show or presentation where
this presentation must fit into a time slot.


Gregg


-- ------------------------------
Gregg C Vanderheiden Ph.D.
Professor - Human Factors
Dept of Ind. Engr. - U of Wis.
Director - Trace R & D Center
Gv@trace.wisc.edu <mailto:Gv@trace.wisc.edu>, <http://trace.wisc.edu/>
FAX 608/262-8848 
For a list of our listserves send “lists” to listproc@trace.wisc.edu
<mailto:listproc@trace.wisc.edu>


-----Original Message-----
From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On
Behalf Of Charles F. Munat
Sent: Tuesday, August 28, 2001 1:59 AM
To: GLWAI Guidelines WG (GL - WAI Guidelines WG)
Cc: Larry Goldberg; geoff_freed@wgbh.org
Subject: RE: Caption synchronization tolerance

Why do captioned objects need to be the same length as uncaptioned
objects?
Why wouldn't it be possible (and even desirable) to allow captioned
versions
to pause the audiovisual long enough for caption readers to catch up?

Just wondering.

Chas. Munat

> -----Original Message-----
> From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org]On
> Behalf Of Gregg Vanderheiden
> Sent: Monday, August 27, 2001 5:35 PM
> To: GLWAI Guidelines WG (GL - WAI Guidelines WG)
> Cc: Larry Goldberg; geoff_freed@wgbh.org
> Subject: Caption synchronization tolerance
>
>
> >Meeting minutes say:
>  >
>  >>#67WC ask Geoff Freed or someone at WBGH.
>  >>JW GV didn't want a number.
>  >>Action WC: Ask Geoff.
>
>
> Not quite
>
> What I said was that I didn't know if it was possible to create a
> number.   Live captioning is delayed for a number of reasons --
> including allowing people to read and correct the captions before
> transmission.   That delay is unavoidable today.   Yet that delay
would
> be unacceptable in a captioned movie.
>
> Also, when doing training, you want the captions to lead any important
> visual event.  That is, you don’t want the person reading the caption
> when they should be looking at the screen to see something critical.
> So having a time gap criterion may yield either an impossible goal or
a
> goal that is way too loose for general use.
>
> Larry Goldberg or Geoff Freed would have the answer though.  Perhaps
> there is a standard for Pre-captioned and another for Live-captioned.
> I would suspect though that these should be recommendations or targets
> (and should be in techniques) rather than sufficiency criteria which
are
> normative.
>
> Geoff?  Larry?
>
> Gregg
>
>
>
> -- ------------------------------
> Gregg C Vanderheiden Ph.D.
> Professor - Human Factors
> Dept of Ind. Engr. - U of Wis.
> Director - Trace R & D Center
> Gv@trace.wisc.edu <mailto:Gv@trace.wisc.edu>, <http://trace.wisc.edu/>
> FAX 608/262-8848 
> For a list of our listserves send “lists” to listproc@trace.wisc.edu
> <mailto:listproc@trace.wisc.edu>
>
>
>
>
Received on Tuesday, 28 August 2001 16:36:17 GMT

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