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An experimental digital television system has been constructed for evaluating digital techniques which involve storage and which may be used to reduce the bandwidth required for the transmission of television signals. The basic configuration of this system is presented. The system is composed of a television camera chain, synchronizing generator, 8-digit analog-to-digital Gray code converter, Gray to natural-binary code translator, high-speed large capacity ultrasonic delay-line memory, digital control logic, 8-digit digital-to-analog converter, television display monitors, and video-tape recording equipment. The picture format consists of 160 lines per frame sequentially scanned at 60 frames per second. The video signal is band-limited to less than 768 kHz, corresponding to a horizontal resolution of 160 samples per line. The required timing and synchronization signals for all equipment are derived from a common clock source.
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F. W. Mounts (1967) studied this question.
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