NIC Processor using variable precision block quantization
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United States of America Patent
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May 31, 1983
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N/A
app pub date -
Dec 22, 1980
filing date -
Dec 22, 1980
priority date (Note) -
Expired
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Abstract
A nearly instantaneous companding processor uses variable precision block quantization for reducing the digital transmission rate of speech signals while at the same time maintaining a high quality signal in a digital communication system. The variable number of bits which are used to encode each sample is controlled as a function of the maximum sample magnitude in a block of N samples. This technique takes advantage of the amplitude probability density function of a speech signal to thereby reduce the quantizing noise without increasing the transmission rate.
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