W3C home > Mailing lists > Public > w3c-wai-ig@w3.org > October to December 2012

Audio description requirements question

From: Jonathan Avila <jon.avila@ssbbartgroup.com>
Date: Tue, 6 Nov 2012 10:26:12 -0500
Message-ID: <aaf85b0cfc90332e36ebb190303bbb6a@mail.gmail.com>
To: w3c-wai-ig@w3.org
I have a question regarding the audio description requirements for
pre-recorded video that I am hoping to seek clarity on.



1.    WCAG 2 1.2.3 requires audio description or media descriptions for
Level A

2.    WCAG 2 1.2.5 requires audio description Level AA and indicates that
audio description should be provided within the pauses of the multimedia.

3.    WCAG 2 1.2.7 requires extended audio descriptions for multimedia
where there is not sufficient pauses  Level AAA   guidance documents also
indicate media description



If a multimedia presentation does not have sufficient pauses to allow for
audio description, does it still meet Level AA if a media description is
provided?  The non-normative guidance in SC 1.2.7
http://www.w3.org/TR/UNDERSTANDING-WCAG20/media-equiv-extended-ad.htmlseems
indicates
that 1.2.7 only applies to when audio description can be inserted in the
pauses.



Additionally, and somewhat related, guidance from SC 1.2.5 in the
non-normative document at
http://www.w3.org/TR/UNDERSTANDING-WCAG20/media-equiv-audio-desc-only.htmlindicates
that if audio description and a media alternative are provided
then extended audio description is not needed for Level AAA as it is
already met by providing both of these.



   This is an additional requirement if both 1.2.3 and 1.2.5 were met by
providing an audio description only. If 1.2.3 was met, however, by
providing a text description, and the 1.2.5 requirement for an audio
description was met, then 1.2.8 does not add new requirements.



Best Regards,



Jonathan
Received on Tuesday, 6 November 2012 15:26:56 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 6 November 2012 15:26:57 GMT