FIELD: information technology.
SUBSTANCE: in a digital communication system, the count sign is not transmitted and instead of 7, all 8 codeword bits are used to transmit the count modulus, which reduces quantisation noise by 6 dB, thus increasing voice quality at the receiving side. The transmitting side includes a half-wave rectifier which transmits only positive counts at the output and a negative count restorer at the receiving side.
EFFECT: high quality of speech reconstruction owing to reduction of quantisation noise by 6 dB by increasing the number of bits per unit for transmitting the count modulus.
2 dwg
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