Electrical audio signal processing systems and devices – Noise or distortion suppression
Reexamination Certificate
2002-11-07
2009-11-03
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Noise or distortion suppression
C381S313000, C381S092000
Reexamination Certificate
active
07613309
ABSTRACT:
System (10) is disclosed including an acoustic sensor array (20) coupled to processor (42). System (10) processes inputs from array (20) to extract a desired acoustic signal through the suppression of interfering signals. The extraction/suppression is performed by modifying the array (20) inputs in the frequency domain with weights selected to minimize variance of the resulting output signal while maintaining unity gain of signals received in the direction of the desired acoustic signal. System (10) may be utilized in hearing aids, voice input devices, surveillance devices, and other applications.
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Bilger Robert C.
Bilger, legal representative Carolyn T.
Elledge Mark
Feng Albert S.
Jones Douglas L.
Chin Vivian
Krieg DeVault LLP
Paynter L. Scott
Tran Con P
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