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Chapter 13. Enhancing Accessibility thro... > Using Transcripts as Equivalent Alte...

Using Transcripts as Equivalent Alternatives

A caption is basically a transcript that has been synchronized to the video presentation. Transcripts provide a text version of the audio portion—the dialog and other sounds—of the video presentation. To provide the greatest user independence, transcripts of the audio track and any audio descriptions should be provided in addition to the captioned video files. A transcript is usually but not necessarily provided as a link to a separate page and will be accessed when audio and video are turned off or not supported. A transcript can be linked from the main page by means of a longdesc attribute or a text link. Remember that the text link has to be meaningful both in and out of context. For example, “Assistive technology team dialog” is meaningful in a list of links. “Transcript” is not.

It bears repeating that in order to be accessible—that is, to provide equivalent alternatives to audio content—audio files must have an associated text transcript. This holds for the audio track of a video, an audio description when present, or an audio file without video. An example shows why this is important.


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