Sound source localization apparatus and sound source localization method

摘要

A sound source localization apparatus for localizing a sound source using an eigenvector, includes, a sound signal input unit inputting a sound signal, a correlation matrix calculation unit calculating a correlation matrix of the input sound signal, and an eigenvector calculation unit calculating an eigenvalue of the correlation matrix using the calculated correlation matrix, wherein the eigenvector calculation unit calculates the eigenvector using the correlation matrix of the input sound signal and one or more predetermined correlation matrices.

主权项

1. A sound source localization apparatus, comprising:
a sound signal input unit inputting a sound signal and environmental noise; a correlation matrix calculation unit configured to:
calculate a correlation matrix of the input sound signal,focus or cancel the input sound signal using the calculated correlation matrix for the input sound signal; andcalculate a noise correlation matrix based on the environmental noise; a rotation determining unit for determining a degree of rotation of the sound signal input unit; an eigenvector calculation unit calculating an eigenvector of the correlation matrix using the calculated correlation matrix; and a sound source localization unit configured to:
cancel the environmental noise using an inverse matrix of the noise correlation matrix; andlocalize a sound source using an eigenvector and a generalized eigenvalue decomposition, wherein the eigenvector calculation unit:
calculates the eigenvector using the correlation matrix of the input sound signal and one or more predetermined correlation matrices; andtransforms the correlation matrix based on the degree of rotation determined by the rotation determining unit; and a decay parameter in the generalized eigenvalue decomposition of the eigenvector is changed based on a degree of speed recognition.