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METHODS AND APPARATUS FOR MITIGATING THE EFFECTS OF MICROPHONE OVERLOAD IN ECHO CANCELLATION SYSTEMS
METHODS AND APPARATUS FOR MITIGATING THE EFFECTS OF MICROPHONE OVERLOAD IN ECHO CANCELLATION SYSTEMS
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机译:消除回声取消系统中麦克风超载影响的方法和装置
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摘要
Methods and apparatus for echo and noise cancelation contemplate occasional saturation of an echo and/or noise containing source signal and control adaptation of a cancelation filter to minimize the detrimental effects of such source signal saturation. According to exemplary embodiments, filter coefficients of an adaptive filter are updated only when a prevailing value of the source signal is within a predetermined range of possible source signal values. Consequently, the filter response is not perturbed by source signal saturation, and the adaptive filter continues to provide quality echo suppression even immediately following periods of saturation.
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