Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate
2007-12-25
2007-12-25
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Directive circuits for microphones
C381S122000, C381S091000, C348S014010, C348S014080
Reexamination Certificate
active
10781817
ABSTRACT:
A sound pickup system includes a sound source tracking device that is operable to obtain distance and direction values of a target sound source relative to the sound source tracking device, and that determines nearest and farthest ones of a plurality of microphones in a microphone array relative to the target sound source with reference to determined distances of the sound source tracking device from the microphones, and the distance and direction values obtained by the sound source tracking device. A signal processing unit includes a delay calculator for determining appropriate time delays for the microphones with reference to information from the sound source tracking device, and a delay processor for processing signals generated by the microphones in the microphone array by introducing the corresponding time delays determined by the delay calculator into the signals from the microphones.
REFERENCES:
patent: 5940118 (1999-08-01), Van Schyndel
patent: 6469732 (2002-10-01), Chang et al.
patent: 6593956 (2003-07-01), Potts et al.
patent: 6826284 (2004-11-01), Benesty et al.
Acer Inc.
Chin Vivian
Tran Con P.
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