SOUND SOURCE LOCALIZATION APPARATUS AND SOUND SOURCE LOCALIZATION METHOD

• US 20100329479A1
• Filed: 06/01/2010
• Published: 12/30/2010
• Est. Priority Date: 06/04/2009
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: NAKAJIMA, Hirofumi, NAKAMURA, Keisuke, NAKADAI, Kazuhiro
• Granted Patent: US 9,055,356 B2
• Time in Patent Office: Days
• US Class Current: 381/92
• CPC Class Codes: B25J 9/00 Programme-controlled manipulators
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407

Abstract

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.

Claims

1. A sound source localization apparatus for localizing a sound source using an eigenvector, comprising:

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.

2. The sound source localization apparatus according to claim 1, wherein the eigenvector calculation unit includes a correction unit correcting a predetermined correlation matrix and changes the eigenvector of the predetermined correlation matrix.

3. The sound source localization apparatus according to claim 1, further comprising a microphone posture information storage unit storing microphone posture information indicating a microphone posture,

wherein the eigenvector calculation unit corrects the correlation matrix on the basis of the microphone posture information.

4. A sound source localization method of localizing a sound source using an eigenvector, comprising:

a sound signal input step of inputting a sound signal;

a correlation matrix calculation step of calculating a correlation matrix of the input sound signal; and

an eigenvector calculation step of calculating an eigenvalue of the correlation matrix using the calculated correlation matrix,

wherein, in the eigenvector calculation step, the eigenvector is calculated using the correlation matrix of the input sound signal and one or more predetermined correlation matrices.