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LC-487 Proposed Resolution

From: Ben Caldwell <caldwell@trace.wisc.edu>
Date: Tue, 16 May 2006 23:17:51 -0500
Message-ID: <446AA3EF.1050500@trace.wisc.edu>
To: WCAG-WG <w3c-wai-gl@w3.org>

The following is a proposed resolution for LC-487:

Commenter: Jason White <jasonw@ariel.its.unimelb.edu.au>
Context: Guideline 1.2
Part of Item:
Comment Type: TE
Comment (Including rationale for any proposed change):

Guideline 1.2 does not require, at any conformance level, audio 
descriptions of live video; only prerecorded video is covered. Audio 
description of live video is possible, at least in some circumstances. 
It can indeed be accomplished at a high level of quality, as in live 
plays where describers have access to scripts in advance. In other 
situations, such a degree of quality and accuracy may not be attainable, 
but descriptions could still be attempted. Are there situations in which 
it would be technically and practically infeasible to provide audio 
descriptions of live video? If so, this item could be introduced at 
level 3, otherwise it is a candidate for level 2.

Proposed Change:

Add a success criterion at an appropriate level requiring audio 
descriptions of live video.


Previous drafts (before 23 November 2005) included a similar criterion
at level 3, "Audio descriptions of video are provided for live multimedia."

A proposal to delete this success criterion was raised and discussed on 
27 October 2005.

RATIONALE: because it is almost impossible to do unless the live
multimedia is scripted so you know when people are not talking so you
can speak audio descriptions. In that case we are only talking about
live plays or something and that was not seen as a major enough type of
content on the Web for us to have a success criteria all about it.

resolution: delete Guideline 1.2 L3 SC3 - audio descriptions (live


Proposed Resolution:

Add a general advisory technique for Guideline 1.2 titled, "Providing
audio description for live multimedia."

Response to reviewer:

A criterion similar to this proposal was included in previous drafts of 
WCAG 2.0. However, the working group decided to remove it since this is 
almost impossible to do unless the live multimedia is scripted. The 
working group did not feel that live scripted events were applicable to 
a wide enough range of web content to be included at the success 
criterion level, but has included an advisory techniue (details to be 
completed in a future draft) about providing audio descriptions for live 

Ben Caldwell | <caldwell@trace.wisc.edu>
Trace Research and Development Center <http://trace.wisc.edu>
Received on Wednesday, 17 May 2006 04:18:02 UTC

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