(HDTV, High Definition Television) There are any number of specifications that could apply to this term. In 1941, our current 525 line system was referred to as HDTV. Today, this name is applied to several expanded resolution systems that are coming into place for our future entertainment and information delivery system(s). Several of the proposed HDTV systems claim to have a picture resolution equal to that of a projected 35 mm film print.