Entitlement control messages are private conditional access information which specify control words and possibly other stream-specific, scrambling, and/or control parameters.
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Advanced Television Systems Committee, Inc.
1300 I Street NW, Suite 400E
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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.