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System for detecting speech with background voice estimates and noise estimates

  • US 8,457,961 B2
  • Filed: 08/03/2012
  • Issued: 06/04/2013
  • Est. Priority Date: 06/15/2005
  • Status: Active Grant
First Claim
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1. A process that improves speech detection comprising:

  • separating an input signal into frequency bins;

    estimating a signal strength of a background voice segment or a background signal-to-noise ratio;

    estimating a noise level of a background noise of one or more frequency bins;

    comparing an instant signal-to-noise ratio to one or more of a maximum of the estimated signal strength of the background voice segment, a maximum of the estimated noise level of the background noise and a background signal-to-noise ratio; and

    identifying a speech segment from noise that surrounds the speech segment based on the comparison.

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