Modern perceptual systems for data reduction permit digital audio transmission with a bit rate of 64 kbit/s. The resulting sound quality meets relatively high demands. It is possible to reduce the bit rate even more by permitting audible but not disturbing influences. The paper deals with measures to obtain a perceptual system with a bit rate of about 8 kbit/s.: turbing influences. The paper deals with measures to obtain a perceptual system with a bit rate of about 8 kbit/s.
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