• 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 class="live-author-event">
  <iframe src="https://streaming.example.com/live/author-qa-42" allowfullscreen></iframe>
</div>

Why it matters

A deaf reader tuning into a live author Q&A can watch the author's mouth move but has no idea what book-club question is being answered.

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

Schedule live captioning, CART or a monitored ASR service, as part of setting up any live event stream, not as an afterthought.

<div class="live-author-event">
  <iframe src="https://streaming.example.com/live/author-qa-42?cc=1" allowfullscreen></iframe>
</div>
<!-- Event configured with a CART captioner streaming text into the
     player's caption channel -->

Outcome

A deaf reader follows the live Q&A in real time and submits a follow-up question of their own.

Who is affected

Deaf and hard-of-hearing readers attending the live event in real time get no access to any of the spoken content.

Learn more

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