Apparatus for the detection of voice signals
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United States of America Patent
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-
Nov 16, 1982
Grant Date -
N/A
app pub date -
Sep 25, 1980
filing date -
Sep 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A detection apparatus for receiving an input signal containing noise and for detecting the presence of voice signals therein comprises means for attenuating the input signal and a comparator of the amplitude of the attenuated input signal relative to a variable threshold voltage. This threshold voltage is generated by control means which make the threshold voltage dependent on the peak amplitude value of the input signal. A control signal corresponding to the detection of voice signals is supplied by decision means which carry out a time analysis of the output signal of the comparator.
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