- From: Ian Jacobs <ij@w3.org>
- Date: Tue, 13 Jun 2000 13:40:09 -0400
- To: Jon Gunderson <jongund@uiuc.edu>
- CC: w3c-wai-ua@w3.org
Jon Gunderson wrote: > > Ian, > For synthesized speech I think the minimum requirement should be the range > of values supported by the synthesizer. For volume? > 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 _ 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
Received on Tuesday, 13 June 2000 13:40:16 UTC