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ACTION-238 Revise guidelines 4.9.6

From: Markku Hakkinen <markku.hakkinen@gmail.com>
Date: Wed, 18 Nov 2009 09:27:56 -0500
Message-ID: <3dcaabaf0911180627g22a2f005p120ac6d1a8ca620b@mail.gmail.com>
To: UAWG list <w3c-wai-ua@w3.org>
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)
Received on Wednesday, 18 November 2009 14:28:49 UTC

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