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Speech characteristic extraction method speech charateristic extraction device speech recognition method and speech recognition device

  • US 20050004792A1
  • Filed: 12/12/2002
  • Published: 01/06/2005
  • Est. Priority Date: 12/13/2001
  • Status: Abandoned Application
First Claim
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1. A speech characteristic extraction method that extracts a speech characteristic required for speech recognition, wherein an autocorrelation function of a speech signal is determined, and a value Φ

  • (0) of when a delay time of the autocorrelation function is 0, a delay time τ

    1 and an amplitude φ

    1 of a first peak of the autocorrelation function, and an effective duration time τ

    e of the autocorrelation function are extracted from the autocorrelation function.

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