Adaptive differential pulse code modulation system
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United States of America Patent
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Nov 29, 1988
Grant Date -
N/A
app pub date -
Jun 20, 1986
filing date -
Jun 20, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An adaptive differential pulse code modulation system includes an adaptive quantizer and an adaptive predictor which have a coding characteristic optimized to a voice signal, and a quantizer and a predictor which have a coding characteristic optimized to a voice band MODEM signal. This system is normally used as a coding system optimized to the voice signal, and when this system detects a MODEM training signal, it becomes a coding system optimized to the MODEM signal.
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