Additional information which accompanies AFD data providing exact sizes of either top and bottom bars or side bars for image aspect ratios other than 4:3 or 16:9, such as widescreen movies.
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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.
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