- Also called close captions, this method of supplying visible text under a broadcast picture is mandated by law to be built into all American TV sets sold after 1993
- These sets are designed with a special decoding chip that translates all the audio on the screen into text, such as spoken dialogue, and describes unseen sounds like a dog bark or a knock at the door
- Especially designed for the hearing impaired, closed captioning is also useful in loud public places, when learning a language, and when the dialogue isn’t clear
- The text usually appears in white letters in a black box at the bottom or top of the screen