- From: Gregg Vanderheiden <gv@trace.wisc.edu>
- Date: Wed, 25 Jan 2006 01:34:46 -0600
- To: <w3c-wai-gl@w3.org>
- Message-ID: <00aa01c62181$d13c8520$ee8cfea9@NC6000BAK>
1614 turn off background audio without silencing foreground audio If this is meant to imply that the user should be able to turn off background audio without silencing foreground audio, then the criterion needs to be reworded to reflect that. As it reads today, all multimedia would comply as long as the user can turn off their speakers or mute all audio at the operating system level. [Comment on "1.4 L2 SC3: A mechanism is available to turn off background audio that plays automatically."] Proposed Change it to 1.4.2 A mechanism is available to turn off background audio that plays automatically without turning off system volume. And Close 1615 audio that plays automatically The current wording only applies this criterion to background audio that plays automatically, but if it doesn't play automatically--only in response to some user action--then one could argue that the user can effectively turn it off by declining to start it. Therefore I suggest removing the phrase "that plays automatically" as unnecessary. [Comment on "1.4 L2 SC3: A mechanism is available to turn off background audio that plays automatically."] Suggest Close with We do not want to prevent audio that the user invokes. Just audio that plays automatically. 1616 A mechanism is available to turn off display of background patterns adding a success criterion to the effect that "A mechanism is available to turn off display of background patterns and images that are displayed behind text and/or graphics and to control the color of the solid background behind such text and graphics." I would make this L2. (Or is this a UA issue?) [Comment on "1.4 L2 SC3: A mechanism is available to turn off background audio that plays automatically."] Suggest We had considered this but it would be too restrict graphic formats that could be used. We decided to go have two levels of contrast instead. 1618 turn off playing of the background sounds I would add a third option, "..., or the user can turn off playing of the background sounds." [Comment on "1.4 L3 SC2: Audio content does not contain background sounds or the background sounds are at least 20 decibels lower than the foreground audio content, with the exception of occasional sound effects."] Suggest That we do this. Change success criterion to: 1.4.4 Audio content does not contain background sounds, the background sound can be turned off or the background sounds are at least 20 decibels lower than the foreground audio content, with the exception of occasional sound effects. 1707 L1 SC seems a little weak Says old L1 was weak. Should have ""...ensure that foreground and background colours can be overridden by the reader," " Suggest That we close this with. This is not currently in the capabilities of user agents and would not be possible with standard HTML pages. We will include this as optional technique under guideline. 1835 GL 1.4 should require legible contents when using high contrast settings Most users who rely on very high contrast simply activate a relevant setting in their user agent, or more commonly in the underlying Operating System. There should be a requirement that content is legible under such circumstances. Suggest Close with comment This would appear to require authors to know what operating system features would be for users (on different operating systems). We do not know how to write techniques for something like this. 1842 color: raise priority of SC 1.3.4, 1.4.1 and 1.4.3 Success Criterion 1.3.4 should either be a stand-alone Level 1 Criterion, or incorporated into Success Criterion 1.3.2. Success Criterion for 1.4.1 should be Level 1, and for 1.4.3 it should be Level 2. Suggest We should poll these suggestions - Move 1.3.4 Any information <http://www.w3.org/WAI/GL/WCAG20/appendixA.html#colorinfodef> that is conveyed by color is visually evident when color is not available to L1 YES/NO - Move 1.4.1 Text or diagrams, and their background, have a luminosity contrast ratio <http://www.w3.org/WAI/GL/WCAG20/appendixA.html#luminosity-contrastdef> of at least 5:1. to L1 YES / NO - Move 1.4.3 Text or diagrams, and their background, have a luminosity contrast ratio <http://www.w3.org/WAI/GL/WCAG20/appendixA.html#luminosity-contrastdef> of at least 10:1 to L2 YES/NO 892 Readable fonts JIS has a guideline that describes choosing default readable fonts. Suggestion that we consider something similar. @@reference to their language. Suggest Would be good to have a technique for JIS to link to. Will advisory technique work? Don't know how to do a testable 'readable font' guidline. Close with We don't think we can create a testable success criterion for this. Readable fonts is not testable. We are adding as advisory technique under 1.4 in Understanding WCAG 2.0. "Using readable fonts."
Received on Wednesday, 25 January 2006 07:34:54 UTC