subtitle(Dialog from film or video displayed on the screen (usually at the bottom) and typically used to provide translation from a foreign langauge); caption(Descriptive text that represents the audio content of a television or video program as text on the screen. Captions are usually visible only if decoded or activated)
closed captioning A service or feature that renders the audio content of a television or video program as text on the screen. These captions are usually visible only if decoded or activated(CC)
