- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Thu, 18 Feb 2010 14:01:45 -0600
- To: "'UAWG list'" <w3c-wai-ua@w3.org>
- DRAFT -
User Agent Accessibility Guidelines Working Group Teleconference
18 Feb 2010
See also: IRC log http://www.w3.org/2010/02/18-ua-irc
Attendees
Present
kford, AllanJ, +1.617.435.aaaa, kim, Greg, Markku_Hakkinen, sharper
Regrets
Jeanne_S
Chair
Kelly_Ford
Scribe
Jim, allanj
Contents
* Topics
1. F2F - 2/24-26
2. Discuss action 242 to review WCAG for a mechanism is available -
http://lists.w3.org/Archives/Public/w3c-wai-ua/2010JanMar/0065.html
3. 4.9 discussion
http://lists.w3.org/Archives/Public/w3c-wai-ua/2010JanMar/0070.html
4. 4.9.11 User has the ability to scale/size the playback viewport
within the limits of the containing viewport.
5. 4.9.12 User has ability to scale and position alternative media
tracks independent of base video.
6. 4.9.13 User has ability to control the contrast and brightness
of the content within the playback viewport.
* Summary of Action Items
Summary of Action Items
ACTION: jallan to write new sc The user should be able to use the user
agent's user interface to control rendered video [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action06]
ACTION: jallan to write SC for user ability to open a plugin or open
external player. [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action05]
ACTION: Jeanne add 4.9.10 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action09]
ACTION: jeanne add 4.9.11 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action10]
ACTION: Jeanne add 4.9.8 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action07]
ACTION: jeanne add new 4.9.9 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action08]
ACTION: Jeanne to add 3.7.2 The user agent allows the user to adjust the
volume of all audio tracks it renders, independent or relative to the volume
level at the operating environment. [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action02]
ACTION: Jeanne to add 4.9.12 to the draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action11]
ACTION: jeanne to add 4.9.13 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action12]
ACTION: Jeanne to update 3.7.1 Global Volume: The user can globally set
volume of all audio tracks it renders (including a "mute" setting) through
available operating environment mechanisms. (Level A) [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action01]
ACTION: KF to write a success criteria for viewport scaling (text, images)
ACTION: MH to provide definition of semantic structure and navigation re
4.9.9 [recorded in http://www.w3.org/2010/02/18-ua-minutes.html#action04]
F2F - 2/24-26
logistics, etc.
Discuss action 242 to review WCAG for a mechanism is available -
http://lists.w3.org/Archives/Public/w3c-wai-ua/2010JanMar/0065.html
GL: what is a 'mechanism'
KF: WCAG says the author should do certain things. I was looking to see if
the UA could provide functionality to make it easier for authors.
<kford> 3.7.2 Local Volume: The user can set the volume of all rendered
audio tracks<
<kford> http://www.w3.org/WAI/UA/2010/ED-UAAG20-20100125/#def-audio-track>
<kford> (including a "mute" setting) through available operating
environment<
<kford>
http://www.w3.org/WAI/UA/2010/ED-UAAG20-20100125/#def-operating-environment>
<kford> mechanisms with settings specific to the user agent such that volume
of the user agent is independent from the overall operating system. (Level
AA)
note: 3.7.2 is proposed new SC
GL: ISO has independent volume adjust as a recommendation.
... at a level AA would be fine
KP: +1
<Greg> FYI for comparison, ISO 9241-141 has *independent* adjustment of
volume as a Note under the item requiring that volume of everything be
adjustable. It reads:
<Greg> 10.6.2 Enable control of audio volume
JA: +1
<Greg> Software shall enable users to control the volume of audio output.
<Greg> NOTE If software generates audio output, it is preferable that it
provide its own control that adjusts the volume of its own audio output
relative to other software and any system-wide volume setting.
KP: example: sometimes with speech you get audio prompts and the user want
volume control of the feedback audio separate from the system audio.
SH: what if there is a plug in, what is the operating environment?
Discussion of definition of OPERATING ENVIRONMENT
scribe: is there confusion. with a plugin, is the UA the environment for the
plugin?
GL: could support that. may need some rewording.
SH: if the UA (operating environment) for the plugin, if it does not have
the control, how does that effect the definition or operation.
GL: we don'w want the plug-in to get off the hook if the UA does not provide
a mechanism.
... rewrite to remove "operating environment". not sure why it is there.
... the plugin is a user agent. example: quicktime plugin. the plugin must
provide the volume.
... the UA generating the audio must provide the independent volume control.
SH: restates issue
<Greg> Kelly's proposal <<3.7.2 Local Volume: The user can set the volume of
all rendered audio tracks (including a "mute" setting) through available
operating environment mechanisms with settings specific to the user agent
such that volume of the user agent is independent from the overall operating
system. (Level AA).>> I recommend taking out the bit about the operating
environment. "3.7.2 Local...
<Greg> ...Volume: The user can set the volume of all rendered audio tracks
(including a "mute" setting) independently from the overall operating
system. (Level AA)."
GL: don't say how they should do it, just that they should do it.
Discussion of 3.7.1, current browser behavior.
SH: reword 3.7.1 to say "globally set volume of all audio tracks it renders"
3.7.1 Global Volume: The user can globally set volume of all audio tracks it
renders (including a "mute" setting) through available operating environment
mechanisms. (Level A)
<Greg> How about something like: The user agent allows the user to adjust
the volume of all audio tracks it renders, independent or relative to the
volume level at the operating environment.
above is a reword to 3.7.2
KF: GL are you ok with global volume and independent volume control
GL: user must control volume, through the OS or its own mechanism.
... OS provides mechanism for audio, with APIs etc. but relies on individual
applications to provide volume control.
... ISO say user must be able to adjust the volume. no how, just do it.
... recommendation to provide independent mechanism.
KF: need separation of global and independent.
... Poll for language of 3.7.1
All ok.
<scribe> ACTION: Jeanne to update 3.7.1 Global Volume: The user can globally
set volume of all audio tracks it renders (including a "mute" setting)
through available operating environment mechanisms. (Level A) [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action01]
<trackbot> Created ACTION-287 - Update 3.7.1 Global Volume: The user can
globally set volume of all audio tracks it renders (including a "mute"
setting) through available operating environment mechanisms. (Level A) [on
Jeanne Spellman - due 2010-02-25].
discussion of 3.7.1
Proposed 3.7.2 The user agent allows the user to adjust the volume of all
audio tracks it renders, independent or relative to the volume level at the
operating environment.
KP: agrees with this
KF: +1
MH: +1
SH: ok
<scribe> ACTION: Jeanne to add 3.7.2 The user agent allows the user to
adjust the volume of all audio tracks it renders, independent or relative to
the volume level at the operating environment. [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action02]
<trackbot> Created ACTION-288 - Add 3.7.2 The user agent allows the user to
adjust the volume of all audio tracks it renders, independent or relative to
the volume level at the operating environment. [on Jeanne Spellman - due
2010-02-25].
KF: WCAG 1.4.8 visual presentation (AAA). Colors covered 3.6.1
... don't have zoom/scaling
<scribe> ACTION: KF to write a success criteria for viewport scaling (text,
images) [recorded in http://www.w3.org/2010/02/18-ua-minutes.html#action03]
<trackbot> Created ACTION-289 - Write a success criteria for viewport
scaling (text, images) [on Kelly Ford - due 2010-02-25].
zakim: open item 5
4.9 discussion
http://lists.w3.org/Archives/Public/w3c-wai-ua/2010JanMar/0070.html
<mhakkinen> ACTION: MH to provide definition of semantic structure and
navigation re 4.9.9 [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action04]
<trackbot> Created ACTION-290 - Provide definition of semantic structure and
navigation re 4.9.9 [on Markku Hakkinen - due 2010-02-25].
<mhakkinen> 4.9.10 Track Enable/Disable of Time-Based Media
<mhakkinen> During time-based media playback, the user can determine which
tracks are
<mhakkinen> available and select or deselect tracks for rendering. These
selections override
<mhakkinen> global default settings for captions, audio descriptions, etc.
(delete
<mhakkinen> 4.9.b)
<mhakkinen> 4.9.8 Navigate Multimedia: The user can navigate along the
timebase using a continuous scale, and by relative time units within
rendered audio and animations (including video and animated images) that
last three or more seconds at their default playback rate. (Level A)
<mhakkinen> 4.9.9 Semantic Navigation of Time-Based Media. The user can
navigate by semantic structure within the time-based media, such as by
chapters or scenes, if present in the media (AA).
4.9.11 User has the ability to scale/size the playback viewport within the
limits of the containing viewport.
set at level AA
4.9.12 User has ability to scale and position alternative media tracks
independent of base video.
GL: plugin can't do that without host permission. seems pie in the sky.
... if you allow moving stuff outside of viewport.
MH: html5 alternate track (divs), expectation is to position and scale these
items
GL: at level AAA ok, still need implementation.
... how would this work with quicktime?
all ok with AAA
4.9.13 User has ability to control the contrast and brightness of the
content within the playback viewport.
all plugins would pass, if opened as stand alone player.
GL: is it ok to spawn to separate application.
JA: I think so, gives example of PDF, quick
GL: do we need an SC to give user ability to open a plugin or open external
player.
<scribe> ACTION: jallan to write SC for user ability to open a plugin or
open external player. [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action05]
<trackbot> Created ACTION-291 - Write SC for user ability to open a plugin
or open external player. [on Jim Allan - due 2010-02-25].
<Greg> The user should be able to use the user agent's user interface to
control rendered video.
MH: sounds like an parent elemet.
<scribe> ACTION: jallan to write new sc The user should be able to use the
user agent's user interface to control rendered video [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action06]
<trackbot> Created ACTION-292 - Write new sc The user should be able to use
the user agent's user interface to control rendered video [on Jim Allan -
due 2010-02-25].
MH: expection in html5 is that the plugin or native rendering all methods,
etc are exposed in the dom and becomes transparent to UA
... html5 will have a list of supported codec, authors will choose codecs.
if outside available codecs author will need to supply different player as
plugin.
discussed 4.9.8-4.9.13 all agreed to let scribe write actions for inclusion
in the draft.
<scribe> ACTION: Jeanne add 4.9.8 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action07]
<trackbot> Created ACTION-293 - Add 4.9.8 to draft [on Jeanne Spellman - due
2010-02-25].
4.9.8 Navigate Multimedia: The user can navigate along the
timebase using a continuous scale, and by relative time units within
rendered audio and animations (including video and animated images) that
last three or more seconds at their default playback rate. (Level A)
<scribe> ACTION: jeanne add new 4.9.9 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action08]
<trackbot> Created ACTION-294 - Add new 4.9.9 to draft [on Jeanne Spellman -
due 2010-02-25].
4.9.9 Semantic Navigation of Time-Based Media. The user can navigate by
semantic structure within the time-based media, such as by chapters or
scenes, if present in the media (AA).
<scribe> ACTION: Jeanne add 4.9.10 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action09]
<trackbot> Created ACTION-295 - Add 4.9.10 to draft [on Jeanne Spellman -
due 2010-02-25].
4.9.10 Track Enable/Disable of Time-Based Media
During time-based media playback, the user can determine which tracks are
available and select or deselect tracks. These selections may override
global default settings for captions, audio descriptions, etc.
<scribe> ACTION: jeanne add 4.9.11 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action10]
<trackbot> Created ACTION-296 - Add 4.9.11 to draft [on Jeanne Spellman -
due 2010-02-25].
4.9.11 User has the ability to scale/size the playback viewport within the
limits of the containing viewport. Level AA
Implementation:
User needs video larger but still needs access to other application (take
notes during playback), fullscreen does not allow that. Content should
reflow as user adjusts playback viewport.
@@need SC for full screen
<scribe> ACTION: Jeanne to add 4.9.12 to the draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action11]
<trackbot> Created ACTION-297 - Add 4.9.12 to the draft [on Jeanne Spellman
- due 2010-02-25].
4.9.12 User has ability to scale and position alternative media tracks
independent of base video. Level AAA
Implementation:
Text scaling - default setting should apply, UA should allow separate
control of the caption tracks. User needs larger captions. Snap captions
outside of video, change text size and caption viewport size/position. User
need to reposition and make the sign language track larger.
<scribe> ACTION: jeanne to add 4.9.13 to draft [recorded in
http://www.w3.org/2010/02/18-ua-minutes.html#action12]
<trackbot> Created ACTION-298 - Add 4.9.13 to draft [on Jeanne Spellman -
due 2010-02-25].
4.9.13 User has ability to control the contrast and brightness of the
content within the playback viewport.
Implementation for all of 4.9
If the browser is playing the video natively, then there is only 1 user
agent. Then it falls on the browser to meet the UAAG spec.
If author uses windows media player inside the video element, the browser
needs to map its native controls to the embedded wmp controls, and provide
access to all the controls.
User needs to be able to define rendering parameters of playback at render
time.
Jim Allan, Accessibility Coordinator & Webmaster
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315 fax: 512.206.9264 http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964
Received on Thursday, 18 February 2010 20:02:34 UTC