2101835-A is referenced by 12 patents.
In a colour television system the luminance signal is split into high and low frequency components, the high-frequency luminance components are frequency shifted to above the conventional television bandwidth. A conventional receiver uses the low-frequency luminance components (Y1) and the chrominance component (C), with no cross effects between them. A high-quality receiver can be constructed to recombine the low-frequency and high-frequency luminance components (Y1 and Y2 min ) giving improved luminance detail, again without cross effects with the chrominance signal. The sound signal (S) is carried between the chrominance and high-frequency luminance. A transmitter and receiver are described. The system has particular applicability to satellite and cable television.