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Device, method, and medium for predicting a probability of an occurrence of a data

  • US 6,466,894 B2
  • Filed: 06/18/1998
  • Issued: 10/15/2002
  • Est. Priority Date: 06/18/1998
  • Status: Expired due to Fees
First Claim
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1. A Bayes mixture density calculator operable in response to a sequence of vectors xn=(x1, x2, . . . , xn) selected from a vector value set x to produce a Bayes mixture density on occurrence of the xn, comprising:

  • a probability density calculator, supplied with a sequence of data xt and a vector value parameter u, for calculating a probability density for the xt, p(xt|u);

    a Bayes mixture calculator for calculating a first approximation value of a Bayes mixture density pw(xn) on the basis of a prior distribution w(u) predetermined by the probability density calculator to produce the first approximation value;

    an enlarged mixture calculator for calculating a second approximation value of a Bayes mixture m(xn) on exponential fiber bundle in cooperation with the probability density calculator to produce the second approximation value; and

    a whole mixture calculator for calculating (1−

    e) pw(xn)+e·

    m(xn) to produce a calculation result by mixing the first approximation value of the Bayes mixture density pw(xn) with a part of the second approximation value of the Bayes mixture m(xn) at a rate of 1−

    e;

    e to produce the calculation result where e is a value smaller than unity, said Bayes mixture density calculator including a device for applying said calculation result to perform data compression using arithmetic coding.

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