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Some typical digital high-efficiency coding algorithms applied to the different types of digital transmission systems are discussed, and the resultant picture quality degradation is examined. Techniques for bit-rate reduction, which is fundamental to high-efficiency coding, are described, namely interframe prediction and conditional picture replenishment, hybrid coding using the discrete cosine transform, and vector quantization. Pulse-code-modulation noise, coding distortion, and channel coding error are considered. Subjective and objective methods for evaluating coded pictures are described.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Murakami et al. (1988) studied this question.
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