Noise Canceler

Details Noise Canceler Noise Canceler

1997-06-20

1998-05-19

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Noise or distortion suppression

381947, 381 92, H04B 1500

Patent

active

057546657

ABSTRACT:
The object of the noise canceler of the present invention is to allow hands-free conversation from either of two microphones through a parallel construction having two noise cancelers using FIR adaptive filters. When microphone 2 (at the driver's seat) is used for conversation, microphone 3 (at the passenger seat) is used for collecting noise and a noise-reduced voice signal 105 is obtained by using FIR adaptive filter 14; and when microphone 3 is used for conversation, microphone 2 is used for collecting noise and a noise-reduced voice signal 104 is obtained using FIR adaptive filter 13. These two voice signals 104, 105 are added at adder 17 and the result outputted as voice output signal 103.

REFERENCES:
patent: 4589137 (1986-05-01), Miller
patent: 4672674 (1987-06-01), Clough
patent: 5471538 (1995-11-01), Sasaki
patent: 5473702 (1995-12-01), Yoshida
patent: 5500903 (1996-03-01), Gulli

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