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Reorganizing the requirements in WCAG 1.2

From: Jan Richards <jan.richards@utoronto.ca>
Date: Tue, 27 May 2008 09:50:19 -0400
Message-ID: <483C119B.1040407@utoronto.ca>
To: public-comments-wcag20@w3.org

In attempting to harmonize ATAG 2.0's "Guideline A.2.2 [For the 
authoring tool user interface] Display synchronized alternatives for 
synchronized media" with WCAG 2.0's "Guideline 1.2 Time-based Media: 
Provide alternatives for time-based media" I found the WCAG guideline 
confusing because it's bold labels mix the media types to be made 
accessible (e,g,"Audio-only and Video-only (Prerecorded):") with the 
ways this can be done (e.g. "Sign Language").

I think it makes the most sense to follow the lead of WCAG Guideline 1.1 
and focus on the original media since that's what content authors will 
have in front of them.

NOTE: The proposed changes are purely organizational and are not 
intended to modify any normative requirement.

-----------------------------------------------------------
LEVEL A:

NOTE: Guideline 1.2 does not apply to any media that act as a *media 
alternatives for text* and are clearly labeled as such.

*Prerecorded Media:*

*Audio-only*
- A *text alternative* is provided.
*Video-only*
- Either:
  + a text alternative is provided or
  + an audio track is provided that presents equivalent information.
*Synchronized Audio and Video*
- *Captions* of the audio are provided.
- Either:
  + a *full text alternative for synchronized media including any 
interaction* is provided or
  + *audio descriptions* of the video are provided.

-----------------------------------------------------------
LEVEL AA:

*Prerecorded Media:*

*Synchronized Audio and Video*
- *Audio descriptions* of the video are provided.

*Live Media:*

*Synchronized Audio and Video*
- Live *captions* of the audio are provided.

-----------------------------------------------------------
LEVEL AAA:

*Prerecorded Media:*

*Video-only*
- A *text alternative* is provided.

*Synchronized Audio and Video*
- *Sign language interpretation* of the audio is provided.
- *Extended audio description* of the video is provided.
- A *full text alternative for synchronized media including any 
interaction* is provided.

*Live Media:*

*Audio-only*
- A *text alternative* is provided.

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

Cheers,
Jan



-- 
Jan Richards, M.Sc.
User Interface Design Specialist
Adaptive Technology Resource Centre (ATRC)
Faculty of Information Studies
University of Toronto

   Email: jan.richards@utoronto.ca
   Web:   http://jan.atrc.utoronto.ca
   Phone: 416-946-7060
   Fax:   416-971-2896
Received on Tuesday, 27 May 2008 13:49:20 GMT

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