W3C home > Mailing lists > Public > w3c-wai-gl@w3.org > July to September 2000

Re: Clarification Of Technique 1.3

From: Chris Ridpath <chris.ridpath@utoronto.ca>
Date: Fri, 28 Jul 2000 14:28:58 -0400
Message-ID: <005d01bff8c1$ca58d860$b040968e@ic.utoronto.ca>
To: "WAI WCAG List" <w3c-wai-gl@w3.org>, "Al Gilman" <asgilman@iamdigex.net>
OK. The requirement for an audio description is not dependant on the
presence of a text description.

> An audio description is required when what you miss by not seeing the
video
> is [something in the range of (significant, important, critical)].
>
An audio description is much more difficult to create than a text
description and the file size is much larger. So we need to be clear about
when it's required before telling the author to do all this work.

Do all important/significant/critical videos require an audio description?

Is an audio description necessary if there is a good text description?

Chris


----- Original Message -----
From: "Al Gilman" <asgilman@iamdigex.net>
To: "Chris Ridpath" <chris.ridpath@utoronto.ca>; "WAI WCAG List"
<w3c-wai-gl@w3.org>
Sent: Friday, July 28, 2000 2:07 PM
Subject: Re: Clarification Of Technique 1.3


> At 11:06 AM 2000-07-28 -0400, Chris Ridpath wrote:
> >I'm looking for some clarification on technique 1.3:
> >
> >"1.3 Until user agents can automatically read aloud the text equivalent
of a
> >visual track, provide an auditory description of the important
information
> >of the visual track of a multimedia presentation. [Priority 1]"
> >
> >Does this mean that an audio description is required only if there is a
text
> >equivalent of a visual track? Or, when is an audio description required?
>
> The description is required when it is required, not just when it is
provided.
>
> An audio description is required when what you miss by not seeing the
video
> is [something in the range of (significant, important, critical)].  Once
> User Agents 'all' do synchronized audible playback of a text description
> track as a native function, a synchronized text equivalent will meet the
> requirement for a description.  Until then, provide audio.
>
> The requirement for a description is determined by the complexity and
> importance of the video, not by what the author has done about the
> requirement.
>
> The "until user agents" clause only affect whether this description must
be
> in audio or may be only in text.  It has nothing to do with the criteria
> for when a description is required.
>
> Is that the way others recall, too?
>
> Al
>
> >
> >Thanks,
> >Chris
> >
>
Received on Friday, 28 July 2000 14:30:02 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Monday, 7 December 2009 10:47:05 GMT