The second number in a two-part number used to identify a virtual channel. The minor number changes for each different service that is or will be presented in a DTV transport stream.
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Advanced Television Systems Committee, Inc.
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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.