Electrical audio signal processing systems and devices – Voice controlled
Patent
1990-09-07
1993-11-30
Isen, Forester W.
Electrical audio signal processing systems and devices
Voice controlled
381 42, 381 36, H03G 320
Patent
active
052673235
ABSTRACT:
A voice-operated remote control system has two microphone and an ambient noise remover in a transmitter. One of the microphones picks up a voice command, and the other picks up ambient noise. When the voice command is picked up by one microphone, the ambient noise is also picked up thereby. The ambient noise remover cancels an ambient noise component with an electric signal of the ambient noise picked up by the other microphone, and outputs only a voice command component. The remote control system may have a voice command detector and a mute control circuit. If the preparation of entry of a voice command is detected by the voice command detector, the mute control circuit lowers the sound pressure level of sound reproduced by an information reproducing device before the voice command starts being inputted. The remote control system may also have a recognition condition setting unit for automatically modifying speech recognition conditions if a voice command is rejected to be recognized. The remote control system may further include a speech storage unit for storing input voice commands and a speech reproduction unit for reproducing the stored voice commands as required.
REFERENCES:
patent: 4593403 (1986-06-01), Kishi et al.
patent: 4725956 (1988-02-01), Jenkins
patent: 4769847 (1988-09-01), Taguchi
patent: 4815134 (1989-03-01), Picone et al.
patent: 4827520 (1989-05-01), Zeinstra
patent: 4926484 (1990-05-01), Nakano
patent: 4947436 (1990-08-01), Greaves et al.
Anzo-3, National Semicondcutor, Feb. 1969.
Isen Forester W.
Pioneer Electronic Corporation
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