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major channel

The first number in a two-part number used to identify a virtual channel. Each virtual channel carries one service, such as a television program. The major channel in the U.S. for current NTSC broadcasters is usually their NTSC channel number.

Source: 69

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The Advanced Television Systems Committee, Inc., is an international, non-profit organization developing voluntary standards and recommended practices for digital terrestrial broadcasting. ATSC member organizations represent the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. ATSC also develops digital terrestrial broadcasting implementation strategies and supports educational activities on ATSC standards.

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