Communication system noise cancellation power signal calculation techniques
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United States of America Patent
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Jun 7, 2011
Grant Date -
Jan 22, 2009
app pub date -
Aug 7, 2008
filing date -
Mar 28, 2000
priority date (Note) -
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Abstract
In order to enhance the quality of a communication signal derived from speech and noise, a filter divides the communication signal into a plurality of frequency band signals. A calculator generates a plurality of power band signals each having a power band value and corresponding to one of the frequency band signals. The power band values are based on estimating, over a time period, the power of one of the frequency band signals. The time period is different for different ones of the frequency band signals. The power band values are used to calculate weighting factors which are used to alter the frequency band signals that are combined to generate an improved communication signal.
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