Systems and methods for adjusting automatic gain control
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United States of America Patent
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Jul 26, 2016
Grant Date -
Dec 12, 2013
app pub date -
Mar 13, 2013
filing date -
Jun 8, 2012
priority date (Note) -
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Abstract
Automatic gain control systems disclosed herein can incorporate a confidence metric that can estimate the accuracy of gain adjustments calculated by an automatic gain control module. The confidence metric may be based on a percentage of valid audio samples in a given period of time. Based on the confidence metric, the AGC response may be reduced, delayed, frozen, or otherwise altered from the baseline gain adjustment. Time-averaging process may be used to estimate the input signal power level and determine an appropriate baseline gain adjustment. Additionally, weighting functions can be adjusted to prevent overestimation of the signal power.
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