Understanding Success Criterion 1.2.7: Extended Audio Description (Prerecorded)

Where pauses in foreground audio are insufficient to allow audio descriptions to convey the sense of the video, extended audio description is provided for all prerecorded video content in synchronized media.

Intent of Success Criterion 1.2.7: Extended Audio Description (Prerecorded)

The intent of this Success Criterion is to provide people who are blind or visually impaired access to a synchronized media presentation beyond that which can be provided by standard audio description. This is done by periodically freezing the synchronized media presentation and playing additional audio description. The synchronized media presentation is then resumed.

Because it disrupts viewing for those who do not need the additional description, techniques that allow you to turn the feature on and off are often provided. Alternately, versions with and without the additional description can be provided.

Benefits of Success Criterion 1.2.7: Extended Audio Description (Prerecorded)

Examples of Success Criterion 1.2.7: Extended Audio Description (Prerecorded)

Resources Success Criterion 1.2.7: Extended Audio Description (Prerecorded)

Techniques for Success Criterion 1.2.7: Extended Audio Description (Prerecorded)

Sufficient Techniques

  1. Providing a movie with extended audio descriptions using one of the following:

Advisory Techniques

  • H96
  • Adding extended audio description in multiple languages in SMIL 1.0 (future link)
  • Adding extended audio description in multiple languages in SMIL 2.0 (future link)

Failures