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Apparatus and method for voice activity detection

  • US 20050154583A1
  • Filed: 12/23/2004
  • Published: 07/14/2005
  • Est. Priority Date: 12/25/2003
  • Status: Active Grant
First Claim
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1. A voice activity decision apparatus comprising:

  • an autocorrelation calculating means for calculating autocorrelation values of an input signal;

    a delay calculating means for calculating a plurality of delays at which autocorrelation values calculated by said autocorrelation calculating means become maximums;

    a characteristic deciding means for deciding a characteristic of said input signal on the basis of said plurality of delays calculated by said delay calculating means; and

    an activity decision means for performing the decision for the activity in terms of the input signal on the basis of the result of decision by said characteristic deciding means.

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