NOISE CANCELLATION SYSTEM WITH SIGNAL-TO-NOISE RATIO DEPENDENT GAIN
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United States of America Patent
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Issued Date -
Dec 2, 2010
app pub date -
Dec 15, 2008
filing date -
Dec 21, 2007
priority date (Note) -
Abandoned
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Abstract
There is provided a noise cancellation system, comprising: a voice input, for receiving a wanted signal; a noise input for receiving a detected signal representative of ambient noise; a signal processor, for generating a noise cancellation signal for addition to the wanted signal, the signal processor having an adjustable gain; and control circuitry, for determining a relationship between levels of the wanted signal and the detected signal, and for controlling the adjustable gain on the basis of the determined relationship.
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