PROBLEM TO BE SOLVED: To perform object sound extraction in which a high object sound extraction performance (noise removal performance) can be ensured by a small apparatus in acoustic environments where the object sound and other noises (non-object sounds) are mixed in acoustic signals obtained via a plurality of microphones and mixing conditions can vary.;SOLUTION: The object sound extraction apparatus includes sound source separation sections 10 for separating and generating an object sound separation signal corresponding to an object sound and other reference sound separation signals based on each combination of a main acoustic signal obtained through a main microphone receiving mainly input of the object sound and a plurality of other sub acoustic signals; an object sound separation signal synthesis section 20 for synthesizing the plurality of the separated and generated object sound separation signals; and a spectrum subtraction processing section 31 for extracting an acoustic signal corresponding to the object sound from the synthesis signal by performing a spectrum subtraction processing between the synthesis signal and the reference sound separation signals.;COPYRIGHT: (C)2009,JPO&INPIT
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