A TECHNIQUE FOR PROVIDING COMPATIBILITY BETWEEN HIGH-DEFINITION AND CONVENTIONAL COLOR TELEVISION

摘要

in television broadcast color signal to compatible high-definition (CHDTV) can be converted by a simple and cheap way either a composite signal HDTV color image to be used by HDTV receiver, either a color image signal of a conventional system associated television broadcast (ACTS) for use by a receiver ACTS. The color image signal CHDTV hereinafter described comprises (a) a first line scan rate which is the same as the CSTA signal, (b) a first line signal to a camera signal HDTV product to second line scan rate which is stretched in time and transmitted as is to the first line scan rate into a first portion of the bandwidth of the CHDTV signal, and (c) a second signal line of the signal of HDTV camera that is stretched in time and transmitted as line difference signal on a former sideband carrier signal in a second portion of the bandwidth of the HDTV signal.