This document describes a ghost canceling reference (GCR) signal for NTSC television signals.
Download A/49:1993, “Ghost Canceling Reference Signal for NTSC”, approved 13 May 1993. Reaffirmed by ATSC 10 December 2014.
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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.