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Captions
Guideline
Captions are provided for all prerecorded and live audio content in synchronized media, except when the media is a media alternative for text and is clearly labeled as such.
Intent
The intent of this requirement is to enable people who are deaf or hard of hearing to watch synchronized or real-time media presentations. Captions provide the part of the content available via the audio track. Captions not only include dialogue, but identify who is speaking and include non-speech information conveyed through sound, including meaningful sound effects.
It is acknowledged that at the present time there may be difficulty in creating captions for time-sensitive material and this may result in the author being faced with the choice of delaying the information until captions are available, or publishing time-sensitive content that is inaccessible to the deaf, at least for the interval until captions are available. Over time, the tools for captioning as well as building the captioning into the delivery process can shorten or eliminate such delays.
Captions are not needed when the synchronized media is, itself, an alternate presentation of information that is also presented via text on the Web page. For example, if information on a page is accompanied by a synchronized media presentation that presents no more information than is already presented in text, but is easier for people with cognitive, language, or learning disabilities to understand, then it would not need to be captioned since the information is already presented on the page in text or in text alternatives.
Finding Applicable Components
Find interface components that play synchronized media when activated. This includes streaming media, and streaming live events.
Inspecting and Using Components
- Enable the captioning for the synchronized media.
- Play the synchronized media content.
- Check that the information in the captions is an accurate, synchronized and complete representation of the dialogue and other relevant sounds in the synchronized media.
Section 508/WCAG 2.0 Failure Conditions
- Synchronized media does not have captions.
- Fails 1194.24(c): Captions.
- Fails 1.2.2 Captions (Prerecorded)
- Synchronized media has captions that are not accurate or complete.
- Fails 1194.24(c): Captions.
- Fails 1.2.2 Captions (Prerecorded)
- Synchronized media has captions that are not synchronized with dialog and relevant sounds.
- Fails 1194.22(b): Synchronized Alternatives.
- Fails 1.2.2 Captions (Prerecorded)
- Captions are not provided for streaming of live media events.
- Fails 1.2.4 Captions (Live)
Reporting Test Results
Any failure in Section 508 Failure Conditions results in: Fails Baseline Requirement #20.
Synchronized media has captions AND the captions are an accurate, synchronized and complete representation of the audio contained in the synchronized media then: Passes Baseline Requirement #20.
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