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Speech coding/decoding method having an excitation signal

  • US 5,142,584 A
  • Filed: 07/20/1990
  • Issued: 08/25/1992
  • Est. Priority Date: 07/20/1989
  • Status: Expired due to Term
First Claim
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1. A speech coding method comprising the steps of:

  • obtaining a linear prediction spectrum parameter representing a spectrum envelope for a short-time input discrete speech signal and a pitch parameter representing a pitch period from an input discrete speech signal;

    dividing a frame interval into subintervals in accordance with the pitch parameter;

    obtaining a sound source signal in one of the subintervals by obtaining a multipulse with respect to a difference signal obtained by performing prediction on the basis of a past sound source signal;

    obtaining correction information for correcting at least one of an amplitude and a phase of the sound source signal in other pitch intervals in the frame; and

    outputting the correction information, said linear prediction spectrum parameter and said pitch parameter.

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