In July 2000, the Federal Communications Commission ( FCC) mandated sections of industry-standard EIA-708-B, "digital closed captioning implementation" into its broadcast regulations. The history behind closed captionsĪccording to the Television Decoder Circuitry Act of 1990, all televisions made in the United States since 1993 must have a built-in caption decoder if their picture tubes are larger than 13 inches. For example, captions can be read when audio can't be heard, either because of a noisy environment, such as an airport, or because of an environment that must be kept quiet, such as a hospital. Closed captions are a text version of the spoken part of a television, movie or computer presentation.Ĭlosed captioning was developed to aid deaf and hard-of-hearing people, but it's useful for a variety of situations.
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