Apparatus for speech recognition

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system

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G10L 500

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047364297

ABSTRACT:
Apparatus for speech recognition, having each phoneme as a fundamental recognition unit, recognizes input speech by discriminating phonemes in the input speech. The apparatus comprises a memory for storing phoneme standard patterns of phonemes or phoneme groups; a spectrum analyzer for obtaining parameters indicative of the input speech signal spectrum; a statistical distance measure similarity calculator calculates the degree of similarity between the output of the spectrum analyzer and standard patterns stored in the memory; a segmentation portion for segmenting by using time-dependent low- and high-frequency power variations of the input speech signal and results from the similarity calculator; and a phoneme discriminator for recognizing phonemes by using the results from the similarity calculator.

REFERENCES:
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IEEE Transactions on Electronic Computers, vol. EC-12, No. 5, Dec. 1963, pp. 835-846, New York, USA; T. Sakai et al.: "The Automatic Speech Recognition System for Conversational Sound".
Proceedings of the Fourth International Joint Conference on Pattern Recognition, Kyoto, 7th-10th, Nov. 1978, pp. 985-989, IEEE, New York, USA; Sei-Ichi Nakagawa et al.: "A Real Time Spoken Word Recognition System in a Large Vocabulary with Learning Capability of Speaker Differences".
ICASSP 81 (IEEE International Conference on Acoustics, Speech and Signal Processing), Atlanta, 30th Mar.-1st Apr. 1981, pp. 1156-1159, IEEE, New York, USA; M. Wagner: "Automatic Labelling of Continuous Speech with a Given Phonetic Transcription Using Dynamic Programming Algorithms".
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-27, No. 5, Oct. 1979, pp. 538-549, New York, USA; R. DeMori et al.: "Interference of a Knowledge Source for the Recognition of Nasals in Continuous Speech".
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-23, No. 1, Feb. 1975, pp. 54-67, New York, USA; C. J. Weinstein et al.: "A System for Acoustic-Phonetic Analysis of Continuous Speech".
1978 IEEE Internation Conference on Acoustics, Speech and Signal Processing, Tulsa, 10th-12th Apr. 1978, pp. 728-730, IEEE, New York, USA; Sei-Ichi Nakagawa et al.: "A Word Recognition Method from a Classified Phoneme String in the Lithan Speech Understanding System".

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