In a high-quality component video digital transmission system (FIGS. 1 and 2), transmitter DPCM encoders (110-112) and corresponding receiver DPCM decoders (210-212) include respective adaptive quantizers (402-502 and 802-902) in which a set of prediction error-representative values is selected by the...http://www.google.ca/patents/US4716453?utm_source=gb-gplus-sharePatent US4716453 - Digital video transmission system
