Noise suppressing transmitter and noise suppressing method

Details Noise suppressing transmitter and noise suppressing method Noise suppressing transmitter and noise suppressing method

1997-11-19

1999-11-09

Chang, Vivian

Electrical audio signal processing systems and devices

Noise or distortion suppression

Spectral adjustment

381 941, H04B 1500

Patent

active

059829060

ABSTRACT:
Signals outputted from microphones 111 and 112 are inputted through filters 118 and 119 to noise suppressing sections A and B. One having smaller power is selected from output signals S107a and S107b by switching a selection switch SW in a signal power comparing section 117, to which the output signals S107a and S107b have been inputted, and a transmission signal S108 level-adjusted by a level adjuster is outputted. In the noise suppressing section A (similarly in the section B), microphone output signals S102 and S103 are processed by an adder 113a and a subtracter 114a, a signal S105a outputted from the subtracter 114a is inputted to a subtracter 116a through a filter 115a having a transmission function Fa(z) decided by the positions of the microphones 111 and 112 and a noise suppression signal S107a obtained by subtracting the signal S105a from a signal S104a outputted from the adder 113a is outputted.

REFERENCES:
patent: 5513265 (1996-04-01), Hirano
patent: 5644641 (1997-07-01), Ikeda
patent: 5694474 (1997-12-01), Ngo et al.

Affiliated with

Also associated with

Rating

Noise suppressing transmitter and noise suppressing method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Noise suppressing transmitter and noise suppressing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise suppressing transmitter and noise suppressing method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1466803