| 摘要 |
PROBLEM TO BE SOLVED: To suitably perform clustering even in a frequency band in which spatial aliasing may happen, and create a suitable separation signal. SOLUTION: A phase is normalized in a converted frequency region signal of a mixed signal observed by a plurality of sensors. Furthermore, a frequency normalized signal is created which eliminates a frequency dependent component. A feature amount vector is clustered for every time frequency which makes the frequency normalized signal, etc. as respective elements, and a model parameter of a frequency response model is computed using a centroid of each cluster. Afterward, a phase/norm normalization vector is clustered which makes phase/norm normalized values of the frequency region signals as respective elements, in reference to the frequency response model, etc. with the model parameter substituted thereinto; and creates cluster information corresponding to the cluster to which each phase/norm normalization vector belongs. Separation signals of the frequency region are created using the frequency region signal and the cluster information, and they are converted to separation signals of the time region. COPYRIGHT: (C)2008,JPO&INPIT
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