Control system for controlling equipment provided inside a vehicle utilizing a speech recognition apparatus

Patent 5214707 Issued on May 25, 1993. Estimated Expiration Date:

August 16, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Variable-directivity microphone device
Patent #: 4354059
Issued on: 10/12/1982
Inventor: Ishigaki , et al.

Digital apparatus and method for programmably phase shifting an audio tone
Patent #: 4626796
Issued on: 12/02/1986
Inventor: Elder

Directional microphone arrangement
Patent #: 4712244
Issued on: 12/08/1987
Inventor: Zwicker , et al.

Voice actuated control system for use in a vehicle Patent #: 4827520
Issued on: 05/02/1989
Inventor: Zeinstra

Inventors

Assignee

Fujitsu Ten Limited

Application

No. 745759 filed on 08/16/1991

US Classes:

704/275, Speech controlled system381/92DIRECTIVE CIRCUITS FOR MICROPHONES

Examiners

Primary: Kemeny, Emanuel S.
Assistant: Tung, Kee M.

Attorney, Agent or Firm

Staas & Halsey

Foreign Patent References

0117497 JP 09/13/1981

International Classes

G10L 005/06
G10L 005/00
G10L 003/00
H04R 003/00

Foreign Application Priority Data

1990-08-16 JP

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.