Closed Captioning

Text displayed on screen that represents dialogue, sound effects, music, and other audio information in video content, which viewers can toggle on or off. Unlike open captions, closed captions are a separate data stream that can be enabled or disabled by the viewer. Closed captioning is required by law in many jurisdictions for broadcast and online video content, and is essential for Deaf and Hard of Hearing viewers as well as beneficial in noisy environments, for language learners, and for cognitive accessibility.