Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1990-11-05
1994-05-17
Shaw, Dale M.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
395 24, G10L 500
Patent
active
053135318
ABSTRACT:
A method and apparatus are disclosed for speech analysis and speech recognition. Each speech utterance under examination in accordance with the method of the present invention is digitally sampled and represented as a temporal sequence of data frames. Each data frame is then analyzed by the application of a Fast Fourier Transform (FFT) to obtain an indication of the energy content of each data frame in a plurality of frequency bands or bins. An indication of each of the most significant frequency bands, in terms of energy content, are then plotted by bin number for all data frames and graphically combined to create a power content signature for the speech utterance which is indicative of the movement of audio power through the audio spectrum over time for that utterance. By comparing the power content signature of an unknown speech utterance to a number of previously stored power content signatures, each associated with a known utterance, it is possible to identify an unknown speech utterance with a high degree of accuracy. In one preferred embodiment of the present invention, comparisons of power content signatures from unknown speech utterances are made with stored power content signatures utilizing a least squares fit or other suitable technique.
REFERENCES:
patent: 3588353 (1971-06-01), Martin
patent: 3603738 (1971-09-01), Focht
patent: 4748670 (1988-05-01), Bahl et al.
patent: 4776017 (1988-10-01), Fujimoto
patent: 4809332 (1989-02-01), Jongman et al.
patent: 4829574 (1989-05-01), Dewhurst et al.
patent: 4852170 (1989-07-01), Boedeaux
patent: 4933973 (1990-06-01), Porter
Flanagan "Speech Analysis Synthesis and Perception", Springer-Verlag 1972 pp. 141-147, 150-155.
Dillon Andrew J.
International Business Machines - Corporation
Shaw Dale M.
Tung Kee M.
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