Captions (Live)

Understanding WCAG2.0

"Caption" required in 1.2.2 is applied to live video.

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 Captions (Live)
(1.2.4 AA)
Captions are provided for all the live audio contents included in the synchronized media.

URL of Techniques for WCAG 2.0