Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1990-03-23
1991-02-05
Shaw, Dale M.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 43, G10L 500
Patent
active
049912160
ABSTRACT:
Phoneme standard patterns are prepared beforehand using speech sounds from a number of individual speakers. Unknown input speech sounds are divided into continuous frames and then some of these frames are extracted such that extracted frames include noncontinuous frames. LPC cepstrum coefficients are obtained for each of the frames and a mean value is obtained from the LPC cepstrum coefficients for each of the phonemes. A first standard pattern is then formed for each of the phonemes belonging to each group determined by characteristics of known speech sounds. Spectrum information of the unknown input speech sounds is produced using such extracted frames, and is then compared with the phoneme standard patterns prestored in a storage to determine and recognize phonemes of the unknown speech sounds by calculating similarity between the two using a statistical distance measure. When obtaining LPC cepstrum coefficients through LPC analysis, the order of LPC cepstrum coefficients is set to a value below the order of LPC analysis. The method according to the present invention reduces the amount of calculations necessary to perform speech recognition without deteriorating phoneme and word recognition rate.
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Fujii Satoru
Niyada Katsuyuki
Knepper David D.
Matsushita Electric - Industrial Co., Ltd.
Shaw Dale M.
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