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Systems and methods for acoustic echo cancellation

  • US 8,208,621 B1
  • Filed: 02/27/2008
  • Issued: 06/26/2012
  • Est. Priority Date: 10/12/2007
  • Status: Active Grant
First Claim
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1. An acoustic echo cancellation method, comprising:

  • generating a first suppression gain of a first sub-band of an Nth acoustic frame;

    generating a second suppression gain of a second sub-band of the Nth acoustic frame; and

    adjusting the second suppression gain of the second sub-band of the Nth acoustic frame according to the first suppression gain of the first sub-band of the Nth acoustic frame, wherein adjusting the second suppression gain of the Nth acoustic frame comprises;

    detecting which determined range that a proportion of the second suppression gain of the Nth acoustic frame to the first suppression gain of which falls into;

    determining an adjustment value according to the detected determined range; and

    multiplying the second suppression gain of the second sub-band of the Nth acoustic frame by the determined adjustment value.

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