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Re: Proposed minimal requirements for audio/speech checkpoints.

From: Jon Gunderson <jongund@uiuc.edu>
Date: Tue, 13 Jun 2000 13:09:59 -0500
Message-Id: <4.3.1.2.20000613130917.00bff8a0@staff.uiuc.edu>
To: Ian Jacobs <ij@w3.org>
Cc: w3c-wai-ua@w3.org
At 01:40 PM 6/13/00 -0400, Ian Jacobs wrote:
>Jon Gunderson wrote:
> >
> > Ian,
> > For synthesized speech I think the minimum requirement should be the range
> > of values supported by the synthesizer.
>
>For volume?

JRG: Sure

> >  Most synthesizer technology allows
> > a user agent to enumerate these values for selection by the user.  The CSS
> > specifications could be a second choice, if the API does not provide for
> > enumeration.
>
>Ok.
>
> > This proposal would also allow the keeping of the current articulation
> > charactersitics.  in the few people with head injuries that I haved worked
> > with, pitch and gender were important factors and I would hate to see them
> > removed.
>
>Then let's add pitch and gender to the list. I have no problem
>with a definitive list; the phrase "and other articulation
>characteristics" will cause us problems. We can simply refer
>to the properties in the Aural Cascading Style Sheets of CSS2

JRG: OK

>  _ Ian
>
>
> > Jon
> >
> > At 03:13 PM 6/12/00 -0400, you wrote:
> > >Hello,
> > >
> > >I propose that minimal requirements for the following checkpoints
> > >from the 10 June draft [1] be established on the basis of
> > >property values in the CSS2 Recommendation [2]:
> > >
> > >   4.8 Allow the user to configure and control the audio volume.
> > >   4.9 Allow the user to configure and control synthesized speech
> > >       playback rate.
> > >   4.11 Allow the user to configure synthesized speech pitch, gender,
> > >        and other articulation characteristics.
> > >
> > >The relevant CSS2 properties are 'volume' (in CSS, for speech
> > >only, but we can generalize its values here) and the voice
> > >characteristics properties of section 19.8 [3]:
> > >
> > >This is not a requirement for user agents to implement CSS,
> > >but to allow the same range of abstract values as specified in CSS.
> > >CSS also allows numbers and percentages, but I don't want to
> > >make those requirements.
> > >
> > >For instance, for volume, the following range would be mapped to
> > >six "real" levels by the user agent: silent, x-soft, soft,
> > >medium, loud, x-loud. Similarly, for speech-rate: x-slow,
> > >slow, medium, fast, x-fast. The relative rates "faster" and
> > >"slower" are relative values specific to CSS inheritance,
> > >so would not be required.
> > >
> > >I will write out the specific values for checkpoints 4.8, 4.9,
> > >and 4.11, but for now I want to get feedback as to whether
> > >people think that this is a reasonable approach.
> > >
> > >IMPORTANT: I propose that we delete "and other articulation
> > >characteristics" from checkpoint 4.11 since that makes it
> > >much harder to specify minimal requirements.
> > >
> > >  - Ian
> > >
> > >[1] http://www.w3.org/WAI/UA/WD-UAAG10-20000610/
> > >[2] http://www.w3.org/TR/1998/REC-CSS2-19980512
> > >[3]
> > >http://www.w3.org/TR/1998/REC-CSS2-19980512/aural.html#voice-char-props
> > >--
> > >Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
> > >Tel:                         +1 831 457-2842
> > >Cell:                        +1 917 450-8783
> >
> > Jon Gunderson, Ph.D., ATP
> > Coordinator of Assistive Communication and Information Technology
> > Division of Rehabilitation - Education Services
> > MC-574
> > College of Applied Life Studies
> > University of Illinois at Urbana/Champaign
> > 1207 S. Oak Street, Champaign, IL  61820
> >
> > Voice: (217) 244-5870
> > Fax: (217) 333-0248
> >
> > E-mail: jongund@uiuc.edu
> >
> > WWW: http://www.staff.uiuc.edu/~jongund
> > WWW: http://www.w3.org/wai/ua
>
>--
>Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
>Tel:                         +1 831 457-2842
>Cell:                        +1 917 450-8783

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Division of Rehabilitation - Education Services
MC-574
College of Applied Life Studies
University of Illinois at Urbana/Champaign
1207 S. Oak Street, Champaign, IL  61820

Voice: (217) 244-5870
Fax: (217) 333-0248

E-mail: jongund@uiuc.edu

WWW: http://www.staff.uiuc.edu/~jongund
WWW: http://www.w3.org/wai/ua
Received on Tuesday, 13 June 2000 14:10:32 GMT

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