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Re: Videos - do we need both captions and transcripts?

From: Janina Sajka <janina@rednote.net>
Date: Mon, 6 Feb 2017 09:33:24 -0500
To: Gregg C Vanderheiden <greggvan@umd.edu>
Cc: John Foliot <john@foliot.ca>, Nimisha Joshi <nimisha.joshi@northwestern.edu>, IG - WAI Interest Group List list <w3c-wai-ig@w3.org>
Message-ID: <20170206143324.GE2476@opera.rednote.net>
Hi, Gregg, All:

Gregg C Vanderheiden writes:
> 
> > On Feb 3, 2017, at 6:07 PM, John Foliot <john@foliot.ca> wrote:
> > 
> > Both captions and video descriptions are synchronized to the "Master" timeline of the video: their utility is based on this synchronization. Transcripts (Gregg called them scripts, but I am unsure what his differentiation is, however the *actual* WCAG definition is for alternative for time-based media - https://www.w3.org/TR/WCAG20/#alt-time-based-mediadef <https://www.w3.org/TR/WCAG20/#alt-time-based-mediadef>) traditionally are not synced to the video resource, but (per the MAUR) should instead take advantage of semantic structure (good headings, inter-document navigation, etc.)
> 
> A transcript is a text doc that contains a transcript of audio.  
> It is only an alternative to a audio recording (or a talking head where there is nothing to describe regarding the video). 
> 
> a Script is a text doc that contains a transcript of the audio and a text description of the important visual information
> a script is an alternative to an AV recording (a video or  movie)
> 
> 
> Synchronized media
> any time based media that needs to be synchronized with something else such as video or audio or interaction
> Examples of media this is synchronized and not 
> an audio recording - is NOT Synchronized media
> an video only recording - is NOT Synchronized media
> an audio/video recording - IS Synchronized media
> an audio recording that has  “press now” in it where what happens depends on pressing at that point in time  - IS Synchronized media
> a video only recording where doing an action at different points in the video has different results (e.g. clicking when you see the car you want)  - IS Synchronized media
> 
> The proper alternatives to the above  5 items
> 
> audio only —  alt is transcript
> video only -   alt is either described video or a text description of the video (the latter is better for deaf-blind access and is faster )
> audio/video -  alt is captioned and described video — or a SCRIPT containing all dialog and sounds and all important visual information  (best for deaf blind)
> Audio with time-based interaction — alt is a transcript with links at the appropriate points in the transcript 
> video only with time based interaction — alt is a text description of the visual information with links at the appropriate points in the text description 
> 
> 
> 
> it would probably be a good idea to grab this and save it someplace like the Understanding WCAG 2.0  - maybe under the general GUIDELINE. 
> 

We expect to update the MAUR this year. Several edits to MAUR 1.0 have
been already proposed before this discussion, So these comments are
timely and most welcome.

I expect APA will form a Task Force to update the MAUR, and then to help
determine further W3C support for accessible media via both the ARIA and
Web Platforms WGs.

Best,

Janina



> 
> best
> 
> gregg

-- 

Janina Sajka,	Phone:	+1.443.300.2200
			sip:janina@asterisk.rednote.net
		Email:	janina@rednote.net

Linux Foundation Fellow
Executive Chair, Accessibility Workgroup:	http://a11y.org

The World Wide Web Consortium (W3C), Web Accessibility Initiative (WAI)
Chair, Accessible Platform Architectures	http://www.w3.org/wai/apa
Received on Monday, 6 February 2017 14:34:44 UTC

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