Acoustic voice activity detection (AVAD) for electronic systems

  • US 8,326,611 B2
  • Filed: 10/26/2009
  • Issued: 12/04/2012
  • Est. Priority Date: 05/25/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • forming a first virtual microphone by combining a first signal of a first physical microphone and a second signal of a second physical microphone;

    forming a filter that describes a relationship for speech between the first physical microphone and the second physical microphone;

    forming a second virtual microphone by applying the filter to the first signal to generate a first intermediate signal, and summing the first intermediate signal and the second signal;

    generating an energy ratio of energies of the first virtual microphone and the second virtual microphone; and

    detecting acoustic voice activity of a speaker when the energy ratio is greater than a threshold value.

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