Small array microphone for beam-forming and noise suppression

Details Small array microphone for beam-forming and noise suppression Small array microphone for beam-forming and noise suppression

2007-02-06

2007-02-06

Pendleton, Brian T. (Department: 2615)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S094200, C381S094300, C704S226000

Reexamination Certificate

active

10601055

ABSTRACT:
Techniques are provided to suppress noise and interference using an array microphone and a combination of time-domain and frequency-domain signal processing. In one design, a noise suppression system includes an array microphone, at least one voice activity detector (VAD), a reference generator, a beam-former, and a multi-channel noise suppressor. The array microphone includes multiple microphones—at least one omni-directional microphone and at least one uni-directional microphone. Each microphone provides a respective received signal. The VAD provides at least one voice detection signal used to control the operation of the reference generator, beam-former, and noise suppressor. The reference generator provides a reference signal based on a first set of received signals and having desired voice signal suppressed. The beam-former provides a beam-formed signal based on a second set of received signals and having noise and interference suppressed. The noise suppressor further suppresses noise and interference in the beam-formed signal.

REFERENCES:
patent: 6339758 (2002-01-01), Kanazawa et al.
patent: 6937980 (2005-08-01), Krasny et al.
patent: 2003/0027600 (2003-02-01), Krasny et al.
patent: 2003/0063759 (2003-04-01), Brennan et al.

Affiliated with

Also associated with

Rating

Small array microphone for beam-forming and noise suppression does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Small array microphone for beam-forming and noise suppression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small array microphone for beam-forming and noise suppression will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3878287