Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate
2007-05-15
2007-05-15
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Directive circuits for microphones
C381S111000, C708S801000
Reexamination Certificate
active
10454849
ABSTRACT:
An adaptive differential microphone array method comprises receiving a signal, estimating a measured signal spectral covariance matrix of the signal, and estimating a direction of arrival of the signal based on the measured signal spectral covariance matrix of the signal. The method further comprises determining a fractional delay, and applying a differential microphone array filter to the signal based on the direction of arrival and the fractional delay.
REFERENCES:
patent: 6584203 (2003-06-01), Elko et al.
patent: 6594367 (2003-07-01), Marash et al.
patent: 6603861 (2003-08-01), Maisano et al.
patent: 6937980 (2005-08-01), Krasny et al.
Balan Radu Victor
Fischer Eghart
Hamacher Volkmar
Hong Liang
Rosca Justinian
Chin Vivian
F. Chau & Associates LLC
Paschburg Donald B.
Siemens Medical Solutions USA, Inc
Tran Con P.
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