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Method for detecting a voice activity decision (voice activity detector)

  • US 20030078770A1
  • Filed: 10/25/2002
  • Published: 04/24/2003
  • Est. Priority Date: 04/28/2000
  • Status: Active Grant
First Claim
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1. A method for determining speech activity in a signal segment of an audio signal, the result of whether speech activity is present in the observed signal segment depending both on the spectral and on the temporal stationarity of the signal segment and/or on preceding signal segments, wherein in a first stage, the method assesses whether spectral stationarity is present in the observed signal segment;

  • and in a second stage, it is assessed whether temporal stationarity is present in the observed signal segment, the final decision on the presence of speech activity in the observed signal segment being dependent on the output values of the two stages.

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