SDH (Subtitles for the Deaf and Hard-of-hearing)
SDH subtitles combine the translation role of subtitles with the accessibility content of captions — speaker labels and sound descriptions — in markets or formats where true closed captions are not available.
SDH exists largely because some delivery formats only support subtitle tracks; adding captioning conventions to a subtitle track gets accessibility without the caption infrastructure. Streaming platforms list SDH as a distinct track type.
Related terms
Frequently asked
What is SDH?
SDH subtitles combine the translation role of subtitles with the accessibility content of captions — speaker labels and sound descriptions — in markets or formats where true closed captions are not available.
Why does SDH matter?
SDH exists largely because some delivery formats only support subtitle tracks; adding captioning conventions to a subtitle track gets accessibility without the caption infrastructure. Streaming platforms list SDH as a distinct track type.
What terms are related to SDH?
Closely related concepts: Closed captions, Subtitles — each has its own entry in this glossary.
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