Signal processing apparatus, signal processing method, and computer program product

A signal processing method comprising:

• acquiring a plurality of observed signals from a plurality of microphone groups, each of the microphone groups comprising a microphone set comprising at least one microphone selected from a plurality of microphones, each microphone set of the plurality of microphone groups being different from each other, at least one of the plurality of microphone groups comprising two or more microphones of the plurality of microphones;
• for each of the plurality of observed signals, estimating a mask indicating occupancy for each time frequency point of a sound signal of a space corresponding to an observed signal in a plurality of spaces;
• and
• integrating masks estimated for the plurality of observed signals to generate an integrated mask indicating occupancy for each of the time frequency points of a target sound signal in a target space determined based at least in part on the plurality of spaces.

A computer program product having a non-transitory computer readable medium comprising programmed instructions, wherein the instructions, when executed by a computer, cause the computer to:

• acquire a plurality of observed signals from a plurality of microphone groups, each of the microphone groups comprising a microphone set comprising at least one microphone selected from a plurality of microphones, each microphone set of the microphone set of the plurality of microphone groups being different from each other, at least one of the plurality of microphone groups comprising two or more microphones of the plurality of microphones;
• for each of the plurality of observed signals, estimate a mask indicating occupancy for each time frequency point of a sound signal of a space corresponding to an observed signal in a plurality of spaces;
• and
• integrate the masks estimated for the plurality of observed signals to generate an integrated mask indicating occupancy for each of the time frequency points of a target sound signal in a target space determined based at least in part on the plurality of spaces.