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However, e-Captioning is now available to TV Broadcast facilities for tapeless workflows. Prior to the advent of e-Captioning, closed captioning was added to a video using a linear deck-to-deck process, which required the use of a physical master video tape, two tape decks (play and record), and a hardware closed captioning encoder. [1]
The National Captioning Institute's work first became publicly well known on March 16, 1980, when ABC, NBC, and PBS collectively introduced closed-captioning of their television shows. [7] At the time, CBS decided not the join the group at first because CBS preferred a different captioning system that was being used in Europe.
One issue was that, due to CBS' heavy emphasis on the ExtraVision service, it did not offer line 21 closed-captioning for the hearing impaired, unlike ABC, NBC or PBS (ABC never offered teletext services, while only certain PBS stations, including the aforementioned KCET and WGBH, experimented with teletext). Some believed that CBS' opposition ...
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The term closed indicates that the captions are not visible until activated by the viewer, usually via the remote control or menu option. On the other hand, the terms open, burned-in, baked on, hard-coded, or simply hard indicate that the captions are visible to all viewers as they are embedded in the video.
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.
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