Control system for controlling equipment provided inside a vehic

Details Control system for controlling equipment provided inside a vehic Control system for controlling equipment provided inside a vehic

1991-08-16

1993-05-25

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 41, 381 46, 381 92, G10L 506, G10L 500, G10L 300, H04R 300

Patent

active

052147070

ABSTRACT:
This invention relates to a control system for controlling equipment provided inside a vehicle utilizing a speech recognition apparatus inside the vehicle. This control system includes an in-phase component detector (4) for detecting an in-phase component of voice signals from microphones (1), a phase shift and in-phase component detector (5) for shifting a phase of the voice signals to detect an in-phase component, and a command seat discriminator (6) for comparing output levels of the in-phase component detector (4) and the phase shift and in-phase component detector (5). In addition, the control system includes validity/invalidity detector (7) for determining the validity and invalidity of a command content resulting from outputs of a speech recognizer (3) based upon a signal generated from the command seat discriminator (6), and a various controller (8) that controls any one of various pieces of equipment with respect to the valid commands output from the validity/invalidity detector (7) to reliably discriminate commands from the driver's seat and the passenger seats in a noisy vehicle.

REFERENCES:
patent: 4354059 (1982-10-01), Ishigaki et al.
patent: 4626796 (1986-12-01), Elder
patent: 4712244 (1987-12-01), Zwicker et al.
patent: 4827520 (1989-05-01), Zeinstra
IEEE Spectrum Jul. 1988 "Phase Digitizing Sharpens Timing Measurements", David Chu, pp. 28-32.

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