Speech recognition system for an automotive vehicle

Details Speech recognition system for an automotive vehicle Speech recognition system for an automotive vehicle

1982-08-16

1985-08-27

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 47, G10L 100

Patent

active

045382956

ABSTRACT:
A speech recognition system for an automotive vehicle can effectively eliminate noise generated by vehicle engines, and comprises a group of bandpass filters the pass bands of which are approximately from 500 to 600, from 900 to 1200, and from 900 to 2200 Hz, for effectively passing only the speech sound formant frequencies while eliminating the major frequency components of engine noise less than 500 Hz, in addition to the conventional speech recognizer. Further, it is desirable to provide the speech recognition system with a high-frequency compensator for enhancing the voltage level of the high frequency components of the electrical signal representing spoken instructions at a rate of 20 dB or more per decade increase in frequency and/or a plurality of notch filters fo sharply reducing the major engine noise frequency components at 200, 400, and 800 Hz.

REFERENCES:
patent: 4061874 (1977-12-01), Fricke et al.
patent: 4087630 (1978-05-01), Browning et al.
patent: 4100370 (1978-07-01), Suzuki et al.
patent: 4158750 (1979-06-01), Sakoe et al.
patent: 4409435 (1983-10-01), Ono
patent: 4461024 (1984-07-01), Renager et al.
D. Raj Reddy, "Speech Recognition by Machine: A Review" Proceedings of the IEEE, vol. 64, No. 4, Apr. 1976.
IBM Technical Disclosure Bulletin, vol. 22, No. 11, Apr. 1980, S. L. Dunik, "Phoneme Recognizer Using Formant Ratios".

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