- From: Charles McCathieNevile <charles@w3.org>
- Date: Wed, 2 Aug 2000 21:49:36 -0400 (EDT)
- To: Chris Ridpath <chris.ridpath@utoronto.ca>
- cc: WAI WCAG List <w3c-wai-gl@w3.org>
An Audio equivalent to video is necessary in the same situations that a text equivalent is necessary (ignoring the question of whether it is OK to rely on synthesising speech from the text equivalent), In My Humble Opinion. I don't know of anyone doing a lot of audio description (but then I can point to a lot of other access barriers that people haven't removed yet too). just my personal thoughts on the topic Charles McCN On Wed, 2 Aug 2000, Chris Ridpath wrote: 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 > -- 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 21:51:38 UTC