gq: There were four major HDTV systems tested by SMPTE in the late 1970s, and in 1979 an SMPTE study group released A Study of High Definition Television Systems:
Question: How many major HDTV systems were tested by SMPTE in the late 70's? Question: Who tested the four major HDTV systems in the late 1970's? Question: In what year was A Study of High Definition Television Systems released? Question: Who released A Study of High Definition Television Systems? Question: What was released by an SMPTE study group in 1979?