Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Reexamination Certificate
2005-09-20
2005-09-20
Lerner, Martin (Department: 2654)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
C704S234000, C704S253000
Reexamination Certificate
active
06947891
ABSTRACT:
A speech recognition system that is insensitive to external noise and applicable to actual life includes an A/D converter that converts analog voice signals to digital signals. An FIR filtering section employs powers-of-two conversion to filter the digital signals converted at the A/D converter into numbers of channels. A characteristic extraction section immediately extracts speech characteristics having strong noise-resistance from the output signals of the FIR filtering section without using additional memories. A word boundary detection section discriminates the information of the start-point and the end-point of a voice signal on the basis of the characteristics extracted by the characteristic extraction section. Finally, a normalization/recognition section codes and outputs the 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 the characteristic extraction section and the information for the start-point and the end-point of the voice signal from the word boundary detection section.
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Kim Chang Min
Lee Soo Young
Bacon & Thomas PLLC
Korea Advanced Institute of Science & Technology
Lerner Martin
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