Frequency domain acoustic echo cancellation using filters and variable step-size updates
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United States of America Patent
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May 19, 2015
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N/A
app pub date -
Mar 13, 2014
filing date -
Mar 13, 2014
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Abstract
A acoustic echo canceller (AEC) system may be configured to perform echo cancellation in the frequency domain. Features are disclosed for determining an estimated echo in the frequency domain using adaptive filters. An adaptive filter corresponding to a frequency bin can comprise a plurality of filter taps. Additional features are disclosed for updating the adaptive filter. In addition, a frequency-bin dependent step size controller may be used to control a step size used in updating the adaptive filters. Features are disclosed for determining the frequency-bin dependent step size.
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