Patent ID: 6947891
Filing Date: 2005-09-20
Classification: G10L

Abstract:
1. A speech recognition system comprising: an A/D converter that converts analog voice signals to digital signals; an FIR filtering section that employs powers-of-two conversion to filter 12-bit digital signals converted at said A/D converter into prescribed numbers of channels; a characteristic extraction section that extracts voice characteristics having strong noise-resistance from the output signals of said FIR filtering section; a word boundary detection section that discriminates information of a start-point and an end-point of a voice signal on the basis of characteristics extracted by the characteristic extraction section; and a normalization/recognition section that codes and outputs a final result by carrying out a timing normalization and a classifying process using a radial basis function (RBF) neural network on the basis of the voice characteristics provided by said characteristic extraction section and the information of the start-point and the end-point of a voice signal from said word boundary detection section.