American standardizing body. SMPTE 240M is the first SMPTE HDEP standard, calling for 1125 scanning lines, 2:1 interlace, a 16:9 aspect ratio, and 60 fields per second, among other characteristics. It is identical to the HDEP standard approved by ATSC. It need not be SMPTE’s only HDEP standard, however. The Society has current standards for more than ten different videotape recording formats, with more pending. There are indications that members of SMPTE’s WG-HDEP are interested in a progressivelyscanned HDEP system, an evolution of the 1125-line interlace standard.