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Accessibility/Video a11y requirements: Difference between revisions
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Accessibility/Video a11y requirements (view source)
Revision as of 00:55, 14 November 2008
, 14 November 2008added SPU
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==== Bitmap (closed) captions ==== | ==== Bitmap (closed) captions ==== | ||
* sometimes closed captions are represented as a a sequence of transparent bitmaps which are overlayed onto the video at given time offsets to display the closed captions (sometimes used on DVDs, or [http://www.subtitling.com/downloads/DVB%20subtitling.pdf DVB] | * sometimes closed captions are represented as a a sequence of transparent bitmaps which are overlayed onto the video at given time offsets to display the closed captions (sometimes used on DVDs also called SPU subtitles, or [http://www.subtitling.com/downloads/DVB%20subtitling.pdf DVB]) | ||
Discussion: | Discussion: | ||
* (-) like open captions, bitmap captions are restrictive because they are just pixels in the video and the actual caption text is not directly accessible other than through OCR | * (-) like open captions, bitmap captions are restrictive because they are just pixels in the video and the actual caption text is not directly accessible other than through OCR | ||