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In the United Kingdom, of 7.5 million people using TV subtitles (closed captioning), 6 million have no hearing impairment. [22] Closed captions are also used in public environments, such as bars and restaurants, where patrons may not be able to hear over the background noise, or where multiple televisions are displaying different programs.
CTA-708 (formerly EIA-708 and CEA-708) is the standard for closed captioning for ATSC digital television (DTV) viewing in the United States and Canada.It was developed by the Consumer Electronics sector of the Electronic Industries Alliance, which became Consumer Technology Association.
The National Captioning Institute was incorporated on January 30, 1979, with millions of dollars of start-up funding from the federal government. [1] [2] [10] On March 23, 1979, the United States Department of Health, Education, and Welfare announced plans for closed-captioning of twenty hours per week of television shows. [11]
EIA-608, also known as "Line 21 captions" and "CEA-608", [1] is a standard for closed captioning for NTSC TV broadcasts in the United States, Canada and Mexico. It was developed by the Electronic Industries Alliance and required by law to be implemented in most television receivers made in the United States.
The "CC in a TV" symbol Jack Foley created, while senior graphic designer at Boston public broadcaster WGBH that invented captioning for television, is public domain so that anyone who captions TV programs can use it. Closed captioning is the American term for closed subtitles specifically intended for people who are deaf or hard-of-hearing.
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Teletext was created in the United Kingdom in the early 1970s by John Adams, Philips' lead designer for video display units to provide closed captioning to television shows for the hearing impaired. [6] Public teletext information services were introduced by major broadcasters in the UK, [7] starting with the BBC's Ceefax service in 1974. [8]
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