Table of Contents

    Live broadcast video must have captions that are synchronised with the audio content of the video. This ensures that the information communicated by the audio part of the video is available to people who cannot hear it.

    Accessibility Requirements for 1.2.4 Captions (live) (AA)

    • All live video content has captions that are synchronised with the audio content of the video.

    Common mistakes for 1.2.4 Captions (live) (AA)

    • The live video does not have synchronised captions;
    • The live video has captions but they are not synchronised with the audio content of the video.

    Techniques for 1.2.4 Captions (live) (AA)

    Common Failures for 1.2.4 Captions (live) (AA)

    The following are common mistakes that are considered failures of Success Criterion 1.2.4 by the WCAG Working Group

    FAQs for Captions (live) (AA) for 1.2.4 Captions (live) (AA)

    Captions Vs Subtitles

    What captioning quality is required for ADA, Section 508 compliance?
    Accuracy: Captions must be 99% accurate when relaying the speaker’s exact words, including correct spelling, punctuation, and grammar, with no paraphrasing.
    Synchronized: Captions must be time synchronized so they align with the words spoken in the video, and must remain visible long enough for the viewer to read (3 to 7 seconds per caption frame).
    Completeness: Videos must include captions from beginning to end.
    Styling and Placement: Font and size should be easy to read and the placement on the screen should no block important content.

    What captioning quality is required for ADA, Section 508 compliance?

    Accuracy: Captions must be 99% accurate when relaying the speaker’s exact words, including correct spelling, punctuation, and grammar, with no paraphrasing.
    Synchronized: Captions must be time synchronized so they align with the words spoken in the video, and must remain visible long enough for the viewer to read (3 to 7 seconds per caption frame).
    Completeness: Videos must include captions from beginning to end.
    Styling and Placement: Font and size should be easy to read and the placement on the screen should no block important content.

    Related to Captions (live) (AA)

    Useful resources for 1.2.4 Captions (live) (AA)

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