SOUND SOURCE SEPARATION SYSTEM, SOUND SOURCE SEPARATION METHOD, AND ACOUSTIC SIGNAL ACQUISITION DEVICE
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides a sound source separation system, a sound source separation method, and an acoustic signal acquisition device which can precisely separate a target sound and a disturbance sound coming from an arbitrary direction, and which ensures miniaturization of a device. A sound source separation system 10 comprises two microphones 21, 22 disposed side by side in a direction in which a target sound comes from, a target sound superior signal generator 30 which performs a linear combination process for emphasizing the target sound, using the received sound signals of the microphones to generate a target sound superior signal, a target sound inferior signal generator 40 which performs a linear combination process for suppressing the target sound, using the received sound signals of the microphones 21, 22, to generate a target sound inferior signal, and a separation unit 60 which separates the target sound and a disturbance sound, using a target sound superior signal spectrum and a target sound inferior signal spectrum.
-
Citations
168 Claims
-
1-110. -110. (canceled)
-
111. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
two microphones disposed in such a manner as to be spaced away from each other; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound using received sound signals of the two microphones on a time domain or a frequency domain to generate at least one target sound superior signal; a target sound inferior signal generator which performs a linear combination process for suppressing the target sound using the received sound signals of the two microphones on a time domain or a frequency domain to generate at least one target sound inferior signal to be paired with the target sound superior signal; and a separator which separates the target sound and the disturbance sound from each other using a spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis and a spectrum of the target sound inferior signal generated by the target sound inferior signal generator or obtained by a subsequent frequency analysis. - View Dependent Claims (112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 163, 164, 165, 166, 167, 168)
-
-
124. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
a total of three first, second and third microphones disposed at respective vertices of a triangle; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound on a time domain or a frequency domain, using received sound signals of the two first and second microphones to generate at least one target sound superior signal; a target sound inferior signal generator which performs a linear combination process for suppressing the target sound on a time domain or a frequency domain, using received sound signals of the two first and third microphones to generate at least a target sound inferior signal to be paired with the target sound superior signal; and a separator that separates the target sound and the disturbance sound from each other using a spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis and a spectrum of the target sound inferior signal generated by the target sound inferior signal generator or obtained by a subsequent frequency analysis. - View Dependent Claims (125, 126, 127, 149, 150, 151, 152)
-
-
128. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
a total of four microphones, respective two microphones being disposed side by side as to be spaced away in a first direction and a second direction intersecting with each other; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound on a time domain or a frequency domain using received sound signals of the two microphones disposed side by side in the first direction in the four microphones to generate at least one target sound superior signal; a target sound inferior signal generator which performs a linear combination process for suppressing the target sound on a time domain or a frequency domain using received sound signals of the two microphones disposed side by side in the second direction in the four microphones to generate at least one target sound inferior signal to be paired with the target sound superior signal; and a separator which separates the target sound and the disturbance sound from each other using a spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis and a spectrum of the target sound inferior signal generated by the target sound inferior signal generator or obtained by a subsequent frequency analysis. - View Dependent Claims (129, 130, 131, 153, 154, 155, 156)
-
-
132. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
a total of four first, second, third and fourth microphones disposed at respective vertices of a rectangle; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound on a time domain or a frequency domain using received sound signals of the two first and second microphones to generate a target sound superior signal; a first target sound inferior signal generator which performs a linear combination process for suppressing the target sound on a time domain or a frequency domain using received sound signals of the two first and third microphones to generate a first target sound inferior signal to be paired with the target sound superior signal; a second target sound inferior signal generator which performs a linear combination process for suppressing the target sound on a time domain or a frequency domain using received sound signals of the two first and fourth microphones to generate a second target sound inferior signal to be paired with the target sound superior signal; a first separator which separates one sound including the target sound, using a spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis, and a spectrum of the first target sound inferior signal generated by the first target sound inferior signal generator or obtained by a subsequent frequency analysis; a second separator which separates the other sound including the target sound, using the spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis, and a spectrum of the second target sound inferior signal generated by the second target sound inferior signal generator or obtained by a subsequent frequency analysis; and an integration unit which performs a spectrum integration process of adding those powers of the spectrums for each frequency band or comparing the powers for each frequency band and assigning inferior power to a spectrum of the target sound, using a spectrum of the one sound including the target sound separated by the first separation unit and a spectrum of the other sound including the target sound separated by the second separation unit. - View Dependent Claims (133)
-
-
134. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
a total of three first, second and third microphones disposed at respective vertices of a triangle; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound on a time domain or a frequency domain, using received sound signals of the three microphones to generate a target sound superior signal; a first target sound inferior signal generator which performs a linear combination process for suppressing the target sound on a time domain or a frequency domain, using received sound signals of the two first and second microphones to generate a first target sound inferior signal to be paired with the target sound superior signal; a second target sound inferior signal generator which performs a linear combination process for suppressing the target sound on a time domain or a frequency domain, using received sound signals of the two first and third microphones to generate a second target sound inferior signal to be paired with the target sound superior signal; a first separator which separates one sound including the target sound, using a spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis, and a spectrum of the first target sound inferior signal generated by the first target sound inferior signal generator or obtained by a subsequent frequency analysis; a second separator which separates the other sound including the target sound, using the spectrum of the target sound superior signal generated by the target sound superior signal generator or obtained by a subsequent frequency analysis, and a spectrum of the second target sound inferior signal generated by the second target sound inferior signal generator or obtained by a subsequent frequency analysis; and an integration unit which performs a spectrum integration process of adding those powers of the spectrums for each frequency band or comparing the powers for each frequency band and assigning inferior power to a spectrum of the target sound, using a spectrum of the one sound including the target sound separated by the first separation unit and a spectrum of the other sound including the target sound separated by the second separation unit. - View Dependent Claims (135)
-
-
136. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
a total of three first, second and third microphones disposed at respective vertices of a triangle on a plane orthogonal to or approximately orthogonal to a direction from which the target sound comes; a first sensitive region formation signal generator that uses received sound signals of the two first and second microphones to generate a spectrum of a first sensitive region formation signal which forms a first sensitive region along a plane orthogonal to a line interconnecting those microphones; a second sensitive region formation signal generator that uses received sound signals of the two second and third microphones to generate a spectrum of a second sensitive region formation signal which forms a second sensitive region along a plane orthogonal to a line interconnecting those microphones; and a sensitive region integration unit that forms a sensitive region for separating the target sound at a common part of the first sensitive region and the second sensitive region using the spectrum of the first sensitive region formation signal generated by the first sensitive region formation signal generator and the spectrum of the second sensitive region formation signal generated by the second sensitive region formation signal generator.
-
-
157. A sound source separation system that separates a target sound and a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes, comprising:
-
a plurality of different-directional-signal-group generators each generating more than or equal to two combinations of spectrums of a plurality of signals each of which has a different directivity, using received sound signals of a plurality of microphones; and a sensitive region formation unit which determines whether or not a relationship between powers of the spectrums in a combination simultaneously satisfies a plurality of conditions each defined for a combination, for each frequency band, using more than or equal to two combinations of the spectrums of the plurality of signals generated by the respective different-directional-signal-group generators, and performs multidimensional band selection of assigning power of a spectrum selected beforehand to a spectrum of the target sound to be separated, for a frequency band where the plurality of conditions are simultaneously satisfied. - View Dependent Claims (158, 159)
-
-
160. An acoustic signal acquisition device that acquires a target sound under a circumstance where a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes is present, comprising:
-
two microphones respectively provided at a corresponding portion of a front face of a portable device at which an operation unit and/or a screen display unit is provided, and a corresponding portion of a rear face opposite thereto; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound, using received sound signals of the two microphones to generate at least one target sound superior signal; and a target sound inferior signal generator which performs a linear combination process for suppressing the target sound, using the received sound signals of the two microphones to generate at least one target sound inferior signal to be paired with the target sound superior signal.
-
-
161. An acoustic signal acquisition device that acquires a target sound under a circumstance where a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes is present, comprising:
-
two microphones provided in such a manner as to be spaced away from each other at a front face of a portable device at which an operation unit and/or a screen display unit is provided; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound, using received sound signals of the two microphones to generate at least one target sound superior signal; and a target sound inferior signal generator which performs a linear combination process for suppressing the target sound, using the received sound signals of the two microphones to generate at least one target sound inferior signal to be paired with the target sound superior signal.
-
-
162. An acoustic signal acquisition device that acquires a target sound under a circumstance where a disturbance sound coming from an arbitrary direction other than a direction from which the target sound comes is present, comprising:
-
first and second microphones respectively provided at a corresponding portion of a front face of a portable device at which an operation unit and/or a screen display unit is provided, and a corresponding portion of a rear face opposite thereto; a third microphone provided at the front face in such a manner as to be spaced away from the first microphone; a target sound superior signal generator which performs a linear combination process for emphasizing the target sound, using received sound signals of the two first and second microphones to generate at least one target sound superior signal; and a target sound inferior signal generator which performs a linear combination process for suppressing the target sound, using the received sound signals of the two first and third microphones to generate at least one target sound inferior signal to be paired with the target sound superior signal.
-
Specification