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This new closed captioning workflow known as e-Captioning involves making a proxy video from the non-linear system to import into a third-party non-linear closed captioning software. Once the closed captioning software project is completed, it must export a closed caption file compatible with the non-linear editing system.
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.
In 1981, United Video Satellite Group launched the first EPG service in North America, a cable channel known simply as The Electronic Program Guide.It allowed cable systems in the United States and Canada to provide on-screen listings to their subscribers 24 hours a day (displaying programming information up to 90 minutes in advance) on a dedicated cable channel.
A significant reason for the demise of American teletext was when Zenith introduced built-in closed captioning decoders in TVs in the early '90s, as mandated by the FCC. It was not practical for Zenith to re-design their TV chassis models that previously had teletext decoder support to have both teletext and closed captioning support.
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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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.
A large LED display is mounted on a rear wall that displays caption characters in mirror image. Viewers move the panels into position (usually below the movie screen or stage) so they can read the reflected captions and watch the presentation. Others seated alongside do not watch, or usually even see, the captions.