Noise reduction system
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United States of America Patent
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-
Oct 27, 1987
Issued Date -
N/A
app pub date -
Jul 25, 1986
filing date -
Apr 5, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A noise reduction system and method for reducing noise occurring during pauses in information bearing audio signals has an audio input connected to one input of a differential output circuit. A variable gain circuit has an input connected to the audio input and an output connected to the other input of the differential circuit. A dc control signal is derived from the incoming signals and controls the variable gain circuit to cause cancellation of a noise only signal during periods of no information bearing audio signals.
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