Provide high-definition compatibility between devices and the conventional color TV color TV

摘要

The compatible high-definition T.V.(CHDTV) color picture signal is formed by first generating a HDTV composite picture signal comprising a sealed up version of the associated conventional system color picture signal including a luminous bandwidth capable of providing a number of picture lines and a line scan rate that is a predetermined multiple of the number of lines and the scan rate of the conventional picture signal, a frame and a field rate that is the same as the conventional signals, and chrominance information that is formed on sidebands of a separate color subcarrier whthin the luminous bandwidth.