401
edits
Accessibility/Video a11y Study08: Difference between revisions
Jump to navigation
Jump to search
Accessibility/Video a11y Study08 (view source)
Revision as of 06:46, 5 February 2009
, 5 February 2009added a note on dynamic content adaptation
(added a note on dynamic content adaptation) |
|||
| Line 33: | Line 33: | ||
'''Recommendation 2:''' Non-text accessibility data, such as spoken audio descriptions, should be multiplexed into the Ogg container format, where media players (including Web browsers) will be able to identify them and offer them to users for decoding. It is further recommended that speech-only accessibility tracks should be encoded using Speex, while video should be encoded using Theora. With graphics, there is currently no clearly recommendable codec in Xiph - probably the best one to use is Ogg Kate or Theora, but OggMNG or OggSpots are options, too. Note that the Xiph community may develop and recommend more appropriate codecs for time-aligned graphics in the future. | '''Recommendation 2:''' Non-text accessibility data, such as spoken audio descriptions, should be multiplexed into the Ogg container format, where media players (including Web browsers) will be able to identify them and offer them to users for decoding. It is further recommended that speech-only accessibility tracks should be encoded using Speex, while video should be encoded using Theora. With graphics, there is currently no clearly recommendable codec in Xiph - probably the best one to use is Ogg Kate or Theora, but OggMNG or OggSpots are options, too. Note that the Xiph community may develop and recommend more appropriate codecs for time-aligned graphics in the future. | ||
Also please note that we recommend development of a dynamic content adaptation scheme that allows the browser to request - on behalf of his user - adequate accessibility tracks together with the content. This is described in more detail in section 6 below. | |||
=== 3. Dealing with Out-of-band Time-aligned Text === | === 3. Dealing with Out-of-band Time-aligned Text === | ||