Extended Audio Description (Prerecorded)

Understanding WCAG2.0

Applying "audio description" required in 1.2.3 to all the synchronized media present on the page. In 1.2.3, it was good to supplement explanations, such as between a conversation and a conversation, but in AAA's "Extended Audio Description", it is necessary to temporarily stop the animation, etc. and provide sufficient audio commentary to understand the situation It is necessary to provide it.

Principle Perceivable Information and user interface components must be presentable to users in ways they can perceive.
Guideline Time-based Media Provide alternatives for time-based media.
Criterion Extended Audio Description (Prerecorded)
(1.2.7 AAA)
When the interval between foreground sounds is insufficient to convey the meaning of video in audio commentary, extended audio commentary is provided for all recorded video contents included in synchronized media.

URL of Techniques for WCAG 2.0