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Re: ACTION-238 Revise guidelines 4.9.6 (revised)

From: Jan Richards <jan.richards@utoronto.ca>
Date: Mon, 30 Nov 2009 11:32:48 -0500
Message-ID: <4B13F3B0.2070307@utoronto.ca>
To: UAWG list <w3c-wai-ua@w3.org>
Hi Mark,

Nice and straightforward. Just a few tweaks added in ALL CAPS:

The user can adjust THE playback rate of prerecorded AUDIO AND/OR VIDEO 
content, such that all of the following are true (Level A):

- THE USER SHOULD BE ABLE TO ADJUST the playback rate of the recorded 
audio and/or video tracks TO between 50% and 250% of real time.

- PRErecorded speech, whose playback rate has been adjusted by the user,
should maintain pitch in order to prevent degradation of the speech
quality.

- Audio and video tracks remain synchronized across the FULL RANGE OF 
playback RATES.

- The UA should provide a function that resets the playback rate to
normal (100%).


Cheers,
Jan


Markku Hakkinen wrote:
> 4.9.6 Change Rate of Time-based Media
> 
> The user can adjust playback rate of prerecorded content such that all
> of the following are true (Level A):
> 
> - The playback rate of the recorded audio and/or video tracks should
> be user adjustable between 50% and 250% of real time.
> 
> - Recorded speech, whose playback rate has been adjusted by the user,
> should maintain pitch in order to prevent degradation of the speech
> quality.
> 
> - Audio and video tracks are expected remain synchronized,across the
> playback range.
> 
> - The UA should provide a function that resets the playback rate to
> normal (100%).
> 

-- 
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 Monday, 30 November 2009 16:33:17 UTC

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