Speech recognition system for an automotive vehicle

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

1982-09-29

1985-07-30

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381104, G10L 100

Patent

active

045326487

ABSTRACT:
A speech recognition system for an automotive vehicle which can record or recognize spoken instruction phrases reliably even when engine noise increases high within the passenger compartment. When the engine begins to operate, the gain of an amplifier of a speech input section or the threshold level of a voice detector is so switched as to reduce the sensitivity to spoken instructions. As a result, the driver must necessarily utter a spoken instruction in a louder voice and thus the proportion of noise level to spoken instruction signal level is reduced. The system according to the present invention comprises engine operation detecting means, an analog switch, two amplifiers or two multipliers, etc. in addition to the conventional speech recognizer.

REFERENCES:
patent: 4100370 (1978-07-01), Suzuki et al.
patent: 4158750 (1979-06-01), Sakoe et al.
patent: 4239936 (1980-12-01), Sakoe
patent: 4380824 (1983-04-01), Inoue

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