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Acoustic echo canceller clock compensation

  • US 8,320,554 B1
  • Filed: 10/19/2010
  • Issued: 11/27/2012
  • Est. Priority Date: 10/19/2010
  • Status: Active Grant
First Claim
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1. An acoustic echo cancellation method for conference audio, comprising:

  • obtaining far-end audio for output to a loudspeaker having a first clock;

    obtaining near-end audio with a microphone having a second clock;

    performing acoustic echo cancellation with the far-end and near-end audio;

    cross-correlating an acoustic echo estimate of the far-end signal with the near-end signal; and

    adjusting the far-end audio used for the acoustic echo cancellation by a factor relating first and second conversion rates of the first and second clocks based on the cross-correlation.

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