Patent ID: 8112272

Claim:
A sound source separation device for separating a sound source signal of a target sound source from a mixed sound which includes sound source signals emitted from a plurality of sound sources using at least two microphones arranged separately from each other comprising: beamforming means for performing a first beamforming processing to attenuate a sound source signal arriving from a predetermined direction by performing computations using first coefficients on an output signal of said microphones, and performing a second beamforming processing to attenuate a sound source signal arriving from a direction symmetrical to said predetermined direction with respect to a perpendicular line to a straight line connecting the two microphones by performing computations using second coefficients which are complex conjugate of said first coefficients in a frequency domain on the output signal of said microphone; power computation means for computing power spectrum information with respect to each of sound source signals obtained by said beamforming means; and target sound spectrum extraction means for extracting spectrum information of a target sound source based on a difference between the power spectrum information calculated by said power computation means.