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This questionnaire was open from 2009-11-18 to 2009-12-02.
3 answers have been received.
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4.9.6 Playback Rate Adjustment for Multimedia Content. The user can adjust playback rate of prerecorded content containing speech audio tracks such that all of the following are true (Level A):
- The playback rate should be user adjustable between 1/3 and 3 times
real time of the recorded content.
- Recorded speech, whose playback rate has been adjusted by the user,
should utilize pitch maintenance in order to avoid degradation of the
speech quality.
If only a visual track is present, provide at least one setting
between 40% and 60% of the original speed. (Level A)
When audio and video tracks are expected to be synchronized,
synchronization is maintained as long as they are played at 75% of the
original speed or higher. (Level A)
The UA should provide a function that resets the playback rate to
normal (1x). (Level A)
Choice | All responders |
---|---|
Results | |
Accept the proposal | 1 |
Recommend changes (see comments field) | |
The proposal needs more discussion (see comments field) | 2 |
Disagree with the proposal | |
Neutral - will accept the consensus of the group |
Responder | Proposal 4.9.6 Playback Rate Adjustment for Multimedia Content. | Comments |
---|---|---|
Kelly Ford | Accept the proposal | I am voting accept on this. I realize we need some harder data but think we could call this out in a draft of seeking comments. Overall the basic concept we want is here. |
Jim Allan | The proposal needs more discussion (see comments field) | synchronization at 75% - UAAG10 set this at 80% see http://www.w3.org/TR/UAAG10/guidelines.html#tech-slow-multimedia playback rate for sign track 2.5-3x loss of comprehension - http://jslhr.highwire.org/cgi/content/abstract/42/3/568 goto http://scholar.google.com/ search for 'playback rate comprehension' ?? only 'speech audio', how is the player/UA to know when something is speech or just sound? are there 'speech ' attributes? should be 'audio' |
Markku Hakkinen | The proposal needs more discussion (see comments field) |
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