Thread Subject: Re: Subpart A- Draft - VIDEO DESCRIPTIONDEFINITION
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From: Gregg Vanderheiden
Date: Wed, Mar 14 2007 8:05 PM
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FROM THE DRAFT
The insertion of verbal or auditory description(s) of on-screen visuals
intended to describe important visual details that are not contained or that
cannot be understood from the main audio output alone. Audio descriptions
supplement the regular audio track of the program and are usually inserted
between dialogue narration to provide information about actions, characters,
and on-screen text that appears without verbailization. Video descriptions
are a way to let people who are blind or have low vision know what is
happening on screen.
Question: Does the definition need to distinguish between audio and video
transcription? Should the definition include the following: In these
standards the term video description is used rather than audio description.
The term audio description is reserved for verbal descriptions of live
1) "on-screen visuals" is not very clear.
2) Video description starts out by being described as "insertion".
It is actually what is inserted.
3) Verbal means in words - not necessarily spoken. Captions are
4) I never knew that audio descriptions was reserved for descriptions
of live events.
a. Ah - I talked to Larry G.
description is reported to be the older term
description was coined for those describing theater etc (where there is no
description widely used as is video description
WIKIPEDIA forwards the term "Video description" to the definition of "Audio
Description" and includes a link to "Joe Clark on Audio Description".
description is the term used by FCC
Description is the term used by OFCom (United Kingdom broadcast standards)
uses "Audio description of video"
viii. HFES and
ISO use Audio Description - but I think HFES should change to Video
Description and cross reference
5) Video Transcription is a different animal. That would be more like
a play since it would be written (transcript) vs recorded.
Or this adapted from WCAG (Just changed Audio description (of video) to
Video description - narration added to the soundtrack to describe important
visual details that cannot be understood from the main soundtrack alone.
Video description provides information about actions, characters, scene
changes, on-screen text, and other visual content. In standard video
description, narration is added during existing pauses in dialogue.
Extended video descriptions are video descriptions that are added to an
audiovisual presentation by pausing the video
<http://www.w3.org/WAI/GL/WCAG20/WD-WCAG20-20070220/#videodef> so that
there is time to add additional description. Extended video descriptions
are only used when the sense of the video
<http://www.w3.org/WAI/GL/WCAG20/WD-WCAG20-20070220/#videodef> would be
lost without the additional video description
<http://www.w3.org/WAI/GL/WCAG20/WD-WCAG20-20070220/#audiodescdef> . Video
descriptions of the video are a way to let people who are blind or have low
vision know what is happening on screen.
Since we don't require extended video descriptions we may not want to
include it unless it is mentioned in an advisory provision.
Just some cannon fodder for working on this one.
I presume we should harmonize with FCC.
I will see what WCAG and HFES want to do.
Audio description would clearly have to be used for plays. (since there is
no video). But E&IT (and the Web) would all be about video.
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