Acoustic signal mixing device and computer-readable storage medium
AssigneeKddi Corporation
InventorToshiharu Horiuchi
Life of this patent
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Abstract
A mixing device includes: processing units each provided for a set of two microphones, each processing unit being configured to process acoustic signals output by the corresponding set of two microphones to output a first acoustic signal and a second acoustic signal; a first adding units configured to add up the first acoustic signals; and a second adding unit configured to add up the second acoustic signals. Each processing unit processes the acoustic signals output by the corresponding set of two microphones, based on a scaling factor that determines a scaling up/down rate of a sound field, a shift factor that determines a shift amount of the sound field, and attenuation factors that determine attenuation amounts of the acoustic signals output by the microphones.
Claims12
A mixing device for mixing acoustic signals collected by a plurality of microphones, comprising:
- processing units that are each provided for a set of two microphones, out of the plurality of microphones, that are defined based on positions at which the microphones are arranged, each processing unit being configured to process acoustic signals output by the corresponding set of two microphones to output a first acoustic signal and a second acoustic signal;
- a first adding unit configured to add up the first acoustic signals output by the processing units that correspond to the respective sets and output the resultant signal;
- and
- a second adding unit configured to add up the second acoustic signals output by the processing units that correspond to the respective sets and output the resultant signal,
- wherein each processing unit processes the acoustic signals output by the corresponding set of two microphones, based on a scaling factor that determines a scaling up/down rate of a sound field, a shift factor that determines a shift amount of the sound field, and attenuation factors that determine attenuation amounts of the acoustic signals output by the microphones.
A non-transitory computer-readable storage medium that stores a computer program,
- wherein the computer program includes instructions of causing, when being executed by one or more processors of a device, the device to:
- process acoustic signals output by each set of two microphones, out of a plurality of microphones, that are defined based on positions at which the microphones are arranged, and output the processed acoustic signals as a first acoustic signal and a second acoustic signal;
- add up the first acoustic signals output by the processing units that correspond to the respective sets and output the resultant signal;
- and
- add up the second acoustic signals output by the processing units that correspond to the respective sets and output the resultant signal,
- wherein
- the outputting the first acoustic signal and the outputting the second acoustic signal include processing the acoustic signals output by the corresponding set of two microphones, based on a scaling factor that determines a scaling up/down rate of a sound field, a shift factor that determines a shift amount of the sound field, and attenuation factors that determine attenuation amounts of the acoustic signals output by the respective microphones.
Dependencies are inferred from the claim text.