- From: Eric Hansen <eghansen@yahoo.com>
- Date: Mon, 19 Apr 1999 17:20:38 -0700 (PDT)
- To: w3c-wai-gl@w3.org
There are several bugs in checkpoint 1.3 regarding auditory description. {EH: Revision 3 - Suggested Revision. I have changed my view since posting an earlier version of this document on 4/18/99.} {EH: Important Bugs: (1) Please note the 4/16/99 version of the checkpoint incorrectly implies that the players will generate "prerecorded" audio since according to the glossary definition, "auditory description" pertains to prerecorded audio. (2) Changed to include animations. I am not sure if there is any good reason why animations should not be included as well as movies; note that checkpoint 1.4 would seem to refer to the possibility of auditory equivalents for animations. (3) This checkpoint was changed to Priority 2; it can't be a Priority 1 since a text equivalent has already been provided per checkpoint 1.1. (4) Instead of referring to capabilities of "video players" in general, this checkpoint should refer to the user agents used by individuals who are blind; this checkpoint is crucial only for individuals who are blind and therefore only needs to refer to individuals who are blind. Fortunately, Web users who are blind often have highly capable user agents that are well-suited to taking text equivalents and rendering them to speech.} 1.3 Until most user agents used by individuals who are blind can use a text equivalent of the time-based visual track of an audio-visual presentation to generate a synchronized synthesized-speech equivalent, provide an auditory description (i.e., a prerecorded auditory equivalent of the visual {EH: Did I coin a term here? Any better suggestions?} track that is synchronized with the audio track). [Priority 2]. Note that checkpoints 1.1, 1.3., and 1.4 all relate to time-based audio-visual presentations such as movies and animations with accompanying audio. Checkpoint 1.1 requires a text equivalent of the visual track (video or animation) and checkpoint 1.4 requires that it be synchronized with the presentation. As noted, checkpoint 1.3 the requirement for the auditory description (which is a specialized, synchronized auditory equivalent of the visual track) is only in effect temporarily. Refer also to checkpoint 1.1 and checkpoint 1.4. Techniques for checkpoint 1.3 == Old 4/16/99 Version of Checkpoint 1.3 1.3 Until most video player technologies can generate an auditory description of a video track from a text equivalent, provide an auditory description of the video track (synchronized with the audio track). [Priority 1] Refer also to checkpoint 1.1 and checkpoint 1.4. Techniques for checkpoint 1.3 === Eric G. Hansen Development Scientist, Educational Testing Service ETS 12-R Rosedale Road Princeton, NJ 08541 (W) 609-734-5615, (Fax) 609-734-1090 Internet: ehansen@ets.org _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
Received on Monday, 19 April 1999 20:18:36 UTC