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Re: ACTION-238 Revise guidelines 4.9.6 (revised)

From: Markku Hakkinen <markku.hakkinen@gmail.com>
Date: Mon, 30 Nov 2009 11:51:35 -0500
Message-ID: <3dcaabaf0911300851m6da8340ev714571639f2794fc@mail.gmail.com>
To: Jan Richards <jan.richards@utoronto.ca>
Cc: UAWG list <w3c-wai-ua@w3.org>
Thanks go to Jim also, who helped in the re-edit.  Your suggested
changes are great. Thanks.

The proposal now stands as:

4.9.6 Change Rate of Time-based Media

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%).


mark

On Mon, Nov 30, 2009 at 11:32 AM, Jan Richards <jan.richards@utoronto.ca> wrote:
> 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 16:52:18 UTC

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