Thread Subject: Re: revision of 24(e)

From: Gregg Vanderheiden
Date: Thu, Jan 04 2007 7:10 AM

• Return to this mailing list's archives
• View all messages in this thread
• Next message in thread: Gregg Vanderheiden: "Re: revision of 24(e)"
• Previous message in thread: Larry Goldberg: "Re: revision of 24(e)"
• Messages sorted by: Author | Thread | Date

Hi Larry



Sorry, I was using the old term. Here is the term we now use and its
definition. Also some info from our Understanding WCAG doc on this topic.





1.2.2 Audio Desc. or Full Text Alt:
Audio description <http://www.w3.org/WAI/GL/WCAG20/#audiodescdef> of video,
or a <http://www.w3.org/WAI/GL/WCAG20/#fullmultaltdef> full text
alternative for multimedia including any interaction , is provided for
prerecorded multimedia <http://www.w3.org/WAI/GL/WCAG20/#multimediadef> .

Note: For 1.2.2, 1.2.3, and 1.2.7, if all of the information in the video
track is already provided in the audio track, no audio description is
necessary.




full text alternative for multimedia including any interaction


document including correctly sequenced descriptions of all visual
settings, actions, and non-speech sounds combined with descriptive
transcripts of all dialogue and a means of achieving any outcomes that are
achieved using interaction during the multimedia

Note: A screenplay used to create the multimedia content would meet this
definition only if it was corrected to accurately represent the final
multimedia after editing.






Intent of this success criterion


The intent of this success criterion is to provide people who are blind or
visually impaired access to the visual information in a multimedia
presentation. This success criterion describes two approaches, either of
which can be used.

One approach is to provide audio description of the video content. The audio
description augments the audio portion of the presentation with the
information needed when the video portion is not available. During existing
pauses in dialogue, audio description provides information about actions,
characters, scene changes, and on-screen text that are important and are not
described or spoken in the main sound track.

The second approach involves providing all of the information in the
multimedia (both visual and auditory) in text form. A full text alternative
for multimedia including any interaction provides a running description of
all that is going on in the multimedia content. The full text alternative
for multimedia including any interaction reads something like a screenplay
or book. Unlike audio description, the description of the video portion are
not constrained to just the pauses in the existing dialogue. Full
descriptions are provided of all visual information, including visual
context, actions and expressions of actors, and any other visual material.
In addition, non-speech sounds (laughter, off-screen voices, etc.) are
described, and transcripts of all dialogue are included. The sequence of
description and dialogue transcripts are the same as the sequence in the
multimedia itself. As a result, the full text alternative for multimedia can
provide a much more complete representation of the multimedia content than
audio description alone.

If there is any interaction as part of the multimedia presentation (e.g.
"press now to answer the question") then the full text alternative for
multimedia would provide hyperlinks or whatever is needed to provide
parallel functionality.

Note: For [this success criterion], if all of the information in the video
track is already provided in the audio track, no audio description is
necessary.









Gregg

-- ------------------------------

Gregg C Vanderheiden Ph.D.







> -----Original Message-----

> From: = EMAIL ADDRESS REMOVED =

> [mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of

> Larry Goldberg

> Sent: Thursday, January 04, 2007 7:27 AM

> To: TEITAC AV list

> Subject: Re: [teitac-video] revision of 24(e)

>

> Can you define, " full collated text version "? - I have a

> sense of what you're talking about, but it would be good to

> know directly what the WCAG means by this.

>

> - Larry

>

>

>

> Gregg Vanderheiden wrote:

>

> > In WCAG we allow a full collated text version of the

> multimedia as an

> > alternative. Works better for training videos where there

> is constant

> > talking and important visual information. Audio

> description won't work.

> > And it also works for people who are deaf-blind.

> >

> > But for movies and movie watching experience AD is much superior.

> >

> >

> > Gregg

> > -- ------------------------------

> > Gregg C Vanderheiden Ph.D.

> >

> >

> >

> >> -----Original Message-----

> >> From: = EMAIL ADDRESS REMOVED =

> >> [mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of geoff

> >> freed

> >> Sent: Wednesday, January 03, 2007 6:17 PM

> >> To: 'TEITAC Audio/Video Subcommittee'

> >> Subject: Re: [teitac-video] revision of 24(e)

> >>

> >>

> >>> -----Original Message-----

> >>> From: = EMAIL ADDRESS REMOVED =

> >>> [mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Andrew

> >>> Kirkpatrick

> >>> Sent: Wednesday, January 03, 2007 5:26 PM

> >>> To: TEITAC Audio/Video Subcommittee

> >>> Subject: Re: [teitac-video] revision of 24(e)

> >>>

> >>> A method shall exist for the user to turn closed captions

> or audio

> >>> descriptions on and off. This shall not be necessary when

> >> captions or

> >>> descriptions are permanently visible or audible to everyone.

> >>>

> >>> What if the 'equivalent' is a text transcript for an audio

> >> file? Is

> >>> that a separate question?

> >>

> >> I think it is. On the wiki we've already discussed how

> 24(c) and (d)

> >> should specify synchronized alternatives (that is, captions and

> >> descriptions). it makes sense to me that 24(e) continue

> this line of

> >> thinking by specifying captions and audio descriptions, not

> >> transcripts. however, perhaps we can add a new clause--

> say, 24(f)--

> >> that allows a transcript where appropriate (the

> no-time-base example

> >> discussed on the

> >> wiki) OR as a way to augment, but not replace, captions or

> >> descriptions.

> >>

> >> Geoff

> >>

> >>

> >>

> >>>

> >>> AWK

> >>>

• Next message in Thread: Gregg Vanderheiden: "Re: revision of 24(e)"
• Previous message in Thread: Larry Goldberg: "Re: revision of 24(e)"