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Voice activity detector based on spectral flatness of input signal

  • US 20050108004A1
  • Filed: 02/24/2004
  • Published: 05/19/2005
  • Est. Priority Date: 03/11/2003
  • Status: Abandoned Application
First Claim
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1. A voice activity detector that detects talkspurts in an input signal, comprising:

  • a frequency spectrum calculator that calculates frequency spectrum of the input signal;

    a flatness evaluator that calculates a flatness factor indicating flatness of the frequency spectrum; and

    a voice/noise discriminator that determines whether the input signal contains a talkspurt, by comparing the flatness factor of the frequency spectrum with a predetermined threshold.

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