- From: Jan Richards <jan.richards@utoronto.ca>
- Date: Wed, 18 Nov 2009 14:22:54 -0500
- To: Markku Hakkinen <markku.hakkinen@gmail.com>
- CC: UAWG list <w3c-wai-ua@w3.org>
Hi Mark, I think we could be more consistent in the way these are stated. In one case we say "1/3 to 3 times" implying 33%-300% and in another we say at least one setting between 40% and 60% which implies a lowest setting of 60% would be ok. Cheers, Jan Markku Hakkinen wrote: > 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) > -- Jan Richards, M.Sc. User Interface Design Lead Adaptive Technology Resource Centre (ATRC) Faculty of Information University of Toronto Email: jan.richards@utoronto.ca Web: http://jan.atrc.utoronto.ca Phone: 416-946-7060 Fax: 416-971-2896
Received on Wednesday, 18 November 2009 19:23:39 UTC