- Success Criterion 1.2.4
- Conformance level AA
Live Webinar Audio With No Real-Time Captions
1.2.4 — Captions (Live)
Scenario
Setting
An e-book reader's library page
What’s wrong
Live stream/webinar with audio and no real-time captions (live human captioning (CART) or quality auto-generated (speech recognition)).
Example
<div id="live-stream"><!-- live video, no caption feed --></div> Why it matters
Deaf and hard-of-hearing participants in live streams, classes, and meetings.
How to test
Join the live stream and check for a captions option (CART or live speech-to-text): if entirely absent, it fails.
How to fix
Readable, reasonably accurate real-time captions must run for the entire live event.
<div id="live-stream"><!-- live video --></div><div id="live-captions" aria-live="polite"></div>Real-time captions, from a human captioner or a checked automated feed, must ship with the live audio, not after it.
Outcome
On an e-book reader's library page, this barrier is gone for deaf and hard-of-hearing participants in live streams, classes — they can complete the task without hitting this wall.
Who is affected
Deaf and hard-of-hearing participants in live streams, classes, and meetings.
Learn more
- Understanding Understanding document (opens in a new tab)
Related scenarios
- Live Event Streamed With No Captioning Plan at All
- Live Captions So Delayed They’re Useless During the Event
- Live Caption Feed Separated From the Video Player
- Live Captions That Cut Out Partway Through the Event
- Live Auto-Captions Too Inaccurate for Technical Content
- Live Captions Unreadable Due to Overlap or Low Contrast