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Method and apparatus for determining articulatory parameters from speech data

  • US 4,980,917 A
  • Filed: 12/27/1988
  • Issued: 12/25/1990
  • Est. Priority Date: 11/18/1987
  • Status: Expired due to Fees
First Claim
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1. A method of determining the values of a series of N articulatory parameters from speech data, comprising the steps of:

  • creating a plurality of speech phoneme classes, each of said speech phoneme classes including a plurality of speech phonemes sharing similar spectral and articulatory characteristics;

    providing a digital speech data signal representative of speech;

    selecting data segments of said speech data signal at predetermined sampling intervals according to predefined changes in energy levels in said speech data signal;

    transforming said selected data segments into spectral data segments;

    converting each of said spectral data segments into said speech phoneme classes so as to generate a weight for the probability that said segment corresponds to phonemes within each of said classes;

    converting each of said spectral data segments into a plurality of articulatory parameters for each of said speech phoneme classes so as to generate a series of N parameter values representative of articulatory characteristics in each speech phoneme class; and

    combining the weight for the probability that spectral data segments correspond to a given speech phoneme class with the output parameter values from each speech phoneme class so as to form a single series of N parameter values for selected data segments.

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