Instantaneous Priority Multiplexing of Gray Pictures
D. Seitzer · IRE Transactions on Communications Systems · 1970
In a multichannel picture transmission system data rate reduction can be achieved by multiplexing. The multiplexer essentially consists of a switch which interconnects a particular scanner to the transmission channel. The position of the switch is controlled by features such as significant changes derived from the pictures to be transmitted. Economy seems favorable due to the sharing of most of the equipment.