HIGH SPEED PREDICTIVE ENCODING AND DECODING SYSTEM FOR TELEVISION VIDEO SIGNALS

摘要

A high speed predictive encoding and decoding system for the frequency band compression of television video signals can use low-speed inexpensive circuit elements instead of high-speed elements conventionally used. This is because for every cycle of logic operations needed for the predictive encoding two video sampling periods are provided. The transmitter portion of the transmission link includes an analoque/digital converter for digitizing a video signal to provide a series of digitized video codewords. Two successive segments of the codeword series are stored temporarily segment by segment in a pair of memories and the codewords of one segment are interleaved with those of an immediately neighbouring segment. The interleaved codewords are predictively encoded to provide a series of codewords representative of the predictive encoding output alternately of the neighbouring segments. The receiver incorporates an appropriate decoding system.