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Technique for modifying reference vector quantized speech feature signals

  • US 5,377,301 A
  • Filed: 01/21/1994
  • Issued: 12/27/1994
  • Est. Priority Date: 03/28/1986
  • Status: Expired due to Term
First Claim
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1. An arrangement for modifying a codebook of vector quantized speech feature signals for speaker verification or adaptation to the voice of a particular speaker comprising:

  • means for storing a set of vector quantized feature signals q(i), i=1, 2, . . . , K, where K is the number of vector quantized feature signals in said set, and a set of occupancy signals n(i) each corresponding to one of said vector quantized feature signal q(i);

    means for receiving an input pattern;

    means for analyzing said input pattern to generate a set of input feature vector signals v(t), t=1,2, . . . , M, where M is the number of vector-quantized feature signals in an input pattern;

    means responsive to said set of input feature signals and said set of vector quantized feature signals for classifying each input feature signal v(t) as one of said set if vector quantized feature signals q(i);

    means responsive to the classification of each input feature signal as one of said vector quantized feature signals for generating an occupancy signal m(i) corresponding to the count of input feature signals classified as each one of said vector quantized feature signals q(i); and

    means for modifying said set if vector quantized feature vector signals, q(i), to produce a modified set of vector quantized feature vector signals, q'"'"'(i), based on said classified input feature vector signals, said input feature occupancy signals, said vector quantized feature signals, and said occupancy signals of said vector quantized feature signals

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