Patent ID: 6173076
Filing Date: 2001-01-09
Classification: G10L

Abstract:
A pattern adaptation system using a distribution tree scheme for adapting a reference pattern comprised a plurality of different categories based on an input pattern as an aggregate of input samples comprising:(a) input pattern generating means for generating the input pattern;(b) reference pattern memory means for storing the reference pattern:(c) pattern matching means for matching the categories of the reference pattern stored in the reference pattern memory means with input samples of the input pattern generated by the input pattern generating means;(d) distribution tree scheme reference pattern memory means for storing beforehand a distribution tree scheme reference pattern as a reference pattern expressed in a tree scheme;(e) data amount estimating means for calculating the input sample numbers, in each node of the tree scheme reference pattern stored in the tree scheme reference pattern memory means, by using the correspondence obtained through the pattern matching by the pattern matching means;(f) node selection means for selecting a node for the adaptation according to the calculated number of the input samples by the data amount estimating means;(g) adaptation parameter generating means for calculating an adaptation parameter in a node selected by the node selecting means; and(h) reference pattern generating means for producing an adapted reference pattern by using the adaptation parameter produced by the adaptation parameter generating means and updating the reference pattern.