1.2.7: Extended Audio Description (Prerecorded)
Level AAA
1.2.7: Extended Audio Description (Prerecorded)
What it means
When normal pauses are too short for standard audio description, provide extended audio description that pauses the video so there is time to describe complex visuals. This suits dense charts, fast demos, or busy scenes.
Viewers still get full visual context without missing dialogue.
How to fix it
- Use extended description tools or editing that freeze video during narration.
- Plan description scripts before production when visuals change quickly.
- Offer extended description as a separate track or version.
- Test with blind reviewers to confirm nothing important is skipped.
Quick examples
- Good: A fast-paced data visualisation video uses extended description that pauses for each chart.
- Bad: Standard description talks over the narrator because scenes change too fast.
- Good: Users can choose “Extended described version” from the media menu.
- Bad: Complex animation is described in one rushed sentence between lines of dialogue.
W3C Understanding 1.2.7: Extended Audio Description (Prerecorded) — full official details