For ATSC (Advanced Television Systems Committee we have a term and definition in Television.

The organization that defined the U.S. high definition and some 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, each scan line divided into 640 or 704 parts or pixels; 720p which is 720 active scan lines each with 1280 pixels, and 1080i (1080 active scan lines as two 540 scan line interlaced fields, 1920 pixels on a line).
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