ATSC  (Advanced Television Systems Committee)

The organization that defined the U.S. high definition and other digital television standards. The standards themselves may be referred to as ATSC or ATV. The most common formats expected to be used are 480p (525 scan lines, 480 of them active, per frame progressive scan, 720p, and 1080i (1080 scan lines as two 540 scan line interlaced fields).