Techniques/General/Caption Updates: Difference between revisions
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==Technique Status Category== | ==Technique Status Category== | ||
[[Category:Techniques | [[Category:Techniques Ready For Review]] | ||
== Status == | == Status == | ||
* Proposed updates to techniques. | |||
* [http://www.w3.org/2014/08/19-wai-wcag-irc#T16-02-54 Action item] for updating Caption related techniques | |||
* | * [http://www.w3.org/2014/08/19-wai-wcag-minutes.html#item03 Meeting minutes] for reference | ||
* | |||
== Applicability == | == Applicability == | ||
Synchronized multimedia with captions. | |||
== WCAG references == | == WCAG references == | ||
* [http://www.w3.org/TR/WCAG20-TECHS/G87 G87: Providing closed captions] (sufficient) | |||
* [http://www.w3.org/TR/WCAG20-TECHS/G93 G93: Providing open (always visible) captions] (sufficient) | |||
* [http://www.w3.org/TR/WCAG20-TECHS/G9 G9: Creating captions for live synchronized media] (sufficient) | |||
* [http://www.w3.org/TR/WCAG20-TECHS/F8 F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects] (failure) | |||
* [http://www.w3.org/TR/WCAG20-TECHS/SM11 SM11: Providing captions through synchronized text streams in SMIL 1.0] (sufficient) | |||
* [http://www.w3.org/TR/WCAG20-TECHS/SM12 SM12: Providing captions through synchronized text streams in SMIL 2.0] (sufficient) | |||
* [http://www.w3.org/TR/WCAG20-TECHS/FLASH9 FLASH9: Applying captions to prerecorded synchronized media] (sufficient) | |||
* [http://www.w3.org/TR/UNDERSTANDING-WCAG20/media-equiv-captions.html SC 1.2.2 Captions (Prerecorded)] (Level A) | |||
* [http://www.w3.org/TR/UNDERSTANDING-WCAG20/media-equiv-real-time-captions.html 1.2.4 Captions (Live)] (Level AA) | |||
* | |||
== User Agent and Assistive Technology Support Notes == | == User Agent and Assistive Technology Support Notes == | ||
== Description == | == Description == | ||
== Examples == | == Examples == | ||
== Resources == | |||
== Related Techniques == | |||
@@ Propose adding F8 as a Related Technique to [http://www.w3.org/TR/WCAG20-TECHS/G87 G87: Providing closed captions] and [http://www.w3.org/TR/WCAG20-TECHS/G93 G93: Providing open (always visible) captions] | |||
* | * [http://www.w3.org/TR/WCAG20-TECHS/F8 F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects] (failure) | ||
== Tests == | |||
@@ Propose updating the final step in the Test Procedure for G87 and G93 as follows below. Earlier steps are not changed, but are provided for context. Bruce thinks that this phrasing approach means that the quality expectations between live and prerecorded media don't need to be called out. | |||
=== G87 Procedure === | |||
* | # Turn on the closed caption feature of the media player | ||
# View the synchronized media content | |||
# Check that captions are visible and verify that: | |||
#* Captions are synchronized with the audio | |||
#* Dialogue and important sounds are accurately captioned | |||
#* Where possible, captions do not obscure or obstruct relevant information in the video, including faces | |||
=== | === G93 Procedure === | ||
# Watch the synchronized media with closed captioning turned off. | |||
# Check that captions are visible and verify that: | |||
#* Captions are synchronized with the audio | |||
#* Dialogue and important sounds are accurately captioned | |||
#* Where possible, captions do not obscure or obstruct relevant information in the video, including faces | |||
@@ SM11, SM12, and FLASH9 are all technology-specific techniques for displaying closed captions. | |||
Marc 19 Aug: While testing for caption accuracy probably shouldn't apply to these techniques, I think it's applicable to test that the technique will not obscure important information. | |||
Bruce 2 Sept: Agree we can assume good quality. Note that Flash9 already had step for checking quality, so this helps with consistency among the three. Do we need them even more consistent? | |||
Propose updating the final step in the Test Procedure for SM11, SM12, and FLASH9 with the following: | |||
=== SM11 and SM12 Procedure === | |||
# Enabled caption preference in player, if present | |||
# Play file with captions | |||
# Check that captions are displayed and verify that: | |||
#* Captions are synchronized with the audio | |||
#* Captions do not obscure or obstruct relevant information in the video, including faces | |||
=== FLASH9 Procedure === | |||
Watch all video content displayed by your Flash movie. Ensure that: | |||
# Captions are available for all audio content, either turned on by default or as a user preference. | |||
# Captions are synchronized with the audio and do not obscure or obstruct relevant information in the video, including faces | |||
== Test Files == | == Test Files == | ||
Latest revision as of 13:57, 2 September 2014
Technique Category
Technique Status Category
Status
- Proposed updates to techniques.
- Action item for updating Caption related techniques
- Meeting minutes for reference
Applicability
Synchronized multimedia with captions.
WCAG references
- G87: Providing closed captions (sufficient)
- G93: Providing open (always visible) captions (sufficient)
- G9: Creating captions for live synchronized media (sufficient)
- F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects (failure)
- SM11: Providing captions through synchronized text streams in SMIL 1.0 (sufficient)
- SM12: Providing captions through synchronized text streams in SMIL 2.0 (sufficient)
- FLASH9: Applying captions to prerecorded synchronized media (sufficient)
- SC 1.2.2 Captions (Prerecorded) (Level A)
- 1.2.4 Captions (Live) (Level AA)
User Agent and Assistive Technology Support Notes
Description
Examples
Resources
Related Techniques
@@ Propose adding F8 as a Related Technique to G87: Providing closed captions and G93: Providing open (always visible) captions
Tests
@@ Propose updating the final step in the Test Procedure for G87 and G93 as follows below. Earlier steps are not changed, but are provided for context. Bruce thinks that this phrasing approach means that the quality expectations between live and prerecorded media don't need to be called out.
G87 Procedure
- Turn on the closed caption feature of the media player
- View the synchronized media content
- Check that captions are visible and verify that:
- Captions are synchronized with the audio
- Dialogue and important sounds are accurately captioned
- Where possible, captions do not obscure or obstruct relevant information in the video, including faces
G93 Procedure
- Watch the synchronized media with closed captioning turned off.
- Check that captions are visible and verify that:
- Captions are synchronized with the audio
- Dialogue and important sounds are accurately captioned
- Where possible, captions do not obscure or obstruct relevant information in the video, including faces
@@ SM11, SM12, and FLASH9 are all technology-specific techniques for displaying closed captions.
Marc 19 Aug: While testing for caption accuracy probably shouldn't apply to these techniques, I think it's applicable to test that the technique will not obscure important information.
Bruce 2 Sept: Agree we can assume good quality. Note that Flash9 already had step for checking quality, so this helps with consistency among the three. Do we need them even more consistent?
Propose updating the final step in the Test Procedure for SM11, SM12, and FLASH9 with the following:
SM11 and SM12 Procedure
- Enabled caption preference in player, if present
- Play file with captions
- Check that captions are displayed and verify that:
- Captions are synchronized with the audio
- Captions do not obscure or obstruct relevant information in the video, including faces
FLASH9 Procedure
Watch all video content displayed by your Flash movie. Ensure that:
- Captions are available for all audio content, either turned on by default or as a user preference.
- Captions are synchronized with the audio and do not obscure or obstruct relevant information in the video, including faces