Videos of only a speaker
This technique relates to:
The purpose of this technique is to provide an alternative to audio description for synchronized media that has no important time based information contained in the video portion of the media. This particularly applies to "talking head" videos where a person is talking in front of an unchanging background, such as a press conference, company president talk, or government announcement, etc. In this case there are no "important visual details" which would warrant audio description.
Audio description is not necessary when there is one person speaking against an unchanging background because there is no time-based visual information in the video that is "important" to the understanding of the content. The environment is static and therefore can be described in a non-multimedia static format such as alternative text that is programmatically associated with the video.
All that is necessary in this case is a static text alternative which would contain a general description of the context of the environment, any opening/closing credits, any text that appears in the bottom of the video with the name of the speaker, and other basic information, if these are seen on the screen and cannot be heard in the audio.
This technique does NOT apply to a situation where there are multiple speakers and where the identity of each new speaker is not evident in the audio track but is identified on screen with visual text as they speak. In this case, audio description should be used, and this technique would not apply.
- Check that there is no important time-based information in the video track
- Check that the programmatically associated description of the media contains any context of the content that is not contained in the audio track (e.g. speaker identification, credits, context)
- All checks are true.