Accessible Publishing Knowledge Base
Audio Description or Media Alternative (Prerecorded)
About
| Version: | WCAG 2.0 and up |
|---|---|
| Number: | 1.2.3 |
| Level: | A |
| Applicability: | Video with accompanying audio |
| Requirement: |
An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such. |
| Guidance: | |
| Techniques: |
|
Purpose
The purpose of this success criterion is to ensure that users who are blind or visually impaired can access the non-visual content (e.g., the actions of individuals, changes in scene, etc.) of a video either through an audio description track or transcript.
How to Meet
To satisfy this success criterion, authors need to provide one or both of the following:
- an audio description track that provides the missing information; or
- a text transcript that fully describes both the audio and visual information.
Additional Information
The following knowledge base pages provide more information about how to address this success criterion for publishing content:
Applies To
| EPUB 3 | EPUB 2 | Audiobooks |
|---|---|---|
| Yes | Yes | Partial * |
* Applies to the table of contents and any supplementary HTML resources.