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Human speech processing apparatus for detecting instants of glottal closure

  • US 6,470,308 B1
  • Filed: 06/04/1997
  • Issued: 10/22/2002
  • Est. Priority Date: 09/20/1991
  • Status: Expired due to Fees
First Claim
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1. An apparatus for processing a speech signal comprising:

  • a filter for receiving said speech signal and for generating a filtered speech signal by deemphasizing a spectral fraction of said speech signal below a predetermined frequency;

    an averaging circuit coupled to said filter for receiving the filtered speech signal and generating, through averaging in successive time windows, a time stream of average signal corresponding to time dependent intensity of said speech signal; and

    a detector for selectively detecting a sequence of time instants of glottal closure by determining peaks of said time dependent intensity of said speech signal.

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