A system for the transmission of high-definition television pictures in narrow-band channels, and a transmitter and a receiver appropriate to the system. The system includes a transmitting section (10) and a receiving section (20). To transmit the picture via a narrow-band channel (30), the picture produced...http://www.google.com/patents/US4785348?utm_source=gb-gplus-sharePatent US4785348 - System for the transmission and reception of high-definition television pictures in narrow-band channels
