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US 6,317,501 B1Granted
Microphone array apparatus
AssigneeFujitsu Limited
InventorNaoshi Matsuo
Life of this patent
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Abstract
A microphone array apparatus includes a microphone array including microphones, one of the microphones being a reference microphone, filters receiving output signals of the microphones, and a filter coefficient calculator which receives the output signals of the microphones, a noise and a residual signal obtained by subtracting filtered output signals of the microphones other than the reference microphone from a filtered output signal of the reference microphone and which obtain filter coefficients of the filters in accordance with an evaluation function based on the residual signal.
Claims5
A microphone array apparatus comprising:
- a microphone array including microphones, one of the microphones being a reference microphone;
- filters receiving output signals of the microphones;
- and
- a filter coefficient calculator which receives the output signals of the microphones, a noise and a residual signal obtained by subtracting filtered output signals of those of the microphones other than the reference microphone from a filtered output signal of the reference microphone and which obtain filter coefficients of the filters in accordance with an evaluation function represented by power of the residual signal.
1 more element
Dependencies are inferred from the claim text.