Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate
2011-06-28
2011-06-28
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Directive circuits for microphones
C381S094100, C381S094300, C381S122000
Reexamination Certificate
active
07970150
ABSTRACT:
A communication system (e.g., a speakerphone) includes an array of microphones, a speaker, memory and a processor. The processor may be configured to perform acoustic echo cancellation, to track multiple talkers with highly directed beams, to design beams with nulls pointed at noise sources, to generate a 3D model of the physical environment, to compensate for the proximity effect, and to perform dereverberation of a talker's voice signal. The processor may also be configured to use a standard codec in non-standard ways. The processor may perform a virtual broadside scan on the microphone array, analyze the resulting amplitude envelope for acoustic source angles, examine each of the source angles with a directed beam, combine the beam outputs that show the characteristics of intelligence or speech.
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Brightwell Mark K.
Chin Vivian
Hood Jeffrey C.
Kim Paul
LifeSize Communications, Inc.
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