Patent ID: 9247343
Filing Date: 2016-01-26
CPC Classification: G01S,H04R

Claim Text:
1. A sound direction estimation device comprising: a first correlation matrix calculation unit configured to calculate a correlation matrix of a plurality of channels of input sound signals; a second correlation matrix calculation unit configured to calculate a correlation matrix of noise signals based on the plurality of channels of sound signals; and a sound source localization unit configured to calculate a spatial spectrum based on the correlation matrix calculated by the first correlation matrix calculation unit and the correlation matrix calculated by the second correlation matrix calculation unit and to estimate a direction of a sound source associated with the plurality of channels of sound signals using the calculated spatial spectrum, wherein the noise signals in the second correlation matrix calculation unit are signals obtained by delaying the plurality of channels of sound signals and a delay time is longer than a time of the plurality of channels of sound signals used to calculate the correlation matrix by the first correlation matrix calculation unit.