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US 10,873,810 B2Granted
Sound pickup device and sound pickup method
AssigneeYamaha Corporation
InventorsTetsuto Kawai, Mikio Muramatsu, Takayuki Inoue, Satoshi Ukai
Life of this patent
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Abstract
A sound pickup method obtains a correlation between a first sound pickup signal to be generated from a first microphone and a second sound pickup signal to be generated from a second microphone, and performs level control of the first sound pickup signal or the second sound pickup signal, according to a ratio of a frequency component of which the correlation exceeds a threshold value.
Claims19
A sound pickup device comprising:
- a calculator that:
- obtains a first sound pickup signal to be generated from a first sound signal output by a first microphone and a second sound pickup signal to be generated from a second sound signal output by a second microphone;
- converts the first sound pickup signal and the second sound pickup signal into a first frequency signal and a second frequency signal;
- calculates a coherence between the first frequency signal and the second frequency signal;
- and
- calculates a ratio of a frequency component of which the calculated coherence exceeds a first threshold value with respect to all frequency components;
- and
- a level controller that controls a level of the first sound pickup signal or the second sound pickup signal according to the calculated ratio.
5 more elements
A sound pickup method comprising:
- obtaining a correlation between a first sound pickup signal to be generated from a first sound signal output by a first microphone and a second sound pickup signal to be generated from a second sound signal output by a second microphone;
- and
- converting the first sound pickup signal and the second sound pickup signal into a first frequency signal and a second frequency signal;
- calculating a coherence between the first frequency signal and the second frequency signal;
- calculating a ratio of a frequency component of which the calculated coherence exceeds a first threshold value with respect to all frequency components;
- and
- controlling a level of the first sound pickup signal or the second sound pickup signal according to the calculated ratio.
4 more elements
A sound pickup device comprising:
- at least one memory device that stores instructions;
- and
- at least one processor that executes the instructions to:
- obtains a first sound pickup signal to be generated from a first sound signal output by a first microphone and a second sound pickup signal to be generated from a second sound signal output by a second microphone;
- converts the first sound pickup signal and the second sound pickup signal into a first frequency signal and a second frequency signal;
- calculates a coherence between the first frequency signal and the second frequency signal;
- calculates a ratio of a frequency component of which the calculated coherence exceeds a threshold value with respect to all frequency components;
- and
- controls a level of the first sound pickup signal or the second sound pickup signal according to the calculated ratio.
6 more elements
Dependencies are inferred from the claim text.