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Re: Clarification Of Technique 1.3

From: Chris Ridpath <chris.ridpath@utoronto.ca>
Date: Wed, 2 Aug 2000 16:09:00 -0400
Message-ID: <006c01bffcbd$8030e610$b040968e@ic.utoronto.ca>
To: "Charles McCathieNevile" <charles@w3.org>
Cc: "WAI WCAG List" <w3c-wai-gl@w3.org>
Ignoring the "until user agents" clause for a minute, when is an audio
description necessary?

Does anyone know of a site that provides audio descriptions for their
multimedia?

Wondering,
Chris


----- Original Message -----
From: "Charles McCathieNevile" <charles@w3.org>
To: "Chris Ridpath" <chris.ridpath@utoronto.ca>
Cc: "WAI WCAG List" <w3c-wai-gl@w3.org>; "Al Gilman" <asgilman@iamdigex.net>
Sent: Tuesday, August 01, 2000 1:05 AM
Subject: Re: Clarification Of Technique 1.3


> I guess the real question is whether the until user agents condition in
WCAG
> checkpoint 1.3 has been met...
>
> Thoughts?
>
> On Fri, 28 Jul 2000, Chris Ridpath wrote:
>
>   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
>   > >
>   >
>
>
> --
> Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409 134
136
> W3C Web Accessibility Initiative
http://www.w3.org/WAI
> Location: I-cubed, 110 Victoria Street, Carlton VIC 3053
> Postal: GPO Box 2476V, Melbourne 3001,  Australia
>
Received on Wednesday, 2 August 2000 16:09:14 GMT

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