Captioning is the process of displaying a transcription of the audio portion of a program on a television, video screen, or other visual display. There are two types of captioning: open captioning, which is visible to all viewers because it is hard-coded into the program; and closed captioning, which has embedded coding that a viewer must activate in order to see the captions. Developed with the needs of the deaf community in mind, captioning first began in television broadcasts and has since spread to other media and venues.

History in Television

In 1970, a failed experiment in sending precise time information via the portion of a television signal that did not carry picture information was launched by the National Bureau of Standards (now the National Institute of ...

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