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SYSTEM AND METHOD FOR ECHO CANCELLATION

  • US 20100057454A1
  • Filed: 09/04/2008
  • Published: 03/04/2010
  • Est. Priority Date: 09/04/2008
  • Status: Active Grant
First Claim
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1. A communication device comprising:

  • an input configured to receive a signal comprising near end background noise, near end speech signals, and far end echo signals;

    an estimator module configured to estimate an energy level of the near end background noise and a level of the near end speech signals to determine whether the communication device is in a double talk mode; and

    an adaptive filter configured to reduce the echo signals of the near end signal using a variable step size algorithm, wherein the variable step size algorithm dynamically changes a speed of the adaptive filter.

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