Adaptive delta modulation codec
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United States of America Patent
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Feb 24, 1987
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N/A
app pub date -
Dec 19, 1983
filing date -
Dec 19, 1983
priority date (Note) -
Expired
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Abstract
An ADM codec includes CVSD encoder and decoder circuitry having a syllabic filter responsive to the binary state of the ADM bit samples for changing the quantization step amplitude at a rate of change directly proportional to the rate of change of slope of the received voice signal.
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