Patent ID: 8976978
Filing Date: 2015-03-10
Classification: G01S,H04R

Abstract:
1. A sound signal processing apparatus comprising: a sound source direction determination unit that determines sound source directions with respect to sound signals of a plurality of channels for respective first to n-th bands; and a filter processing unit that includes first to n-th filters which are connected in series and configured to boost or attenuate the sound signals with respect to the first to n-th bands, wherein the respective first to n-th filters perform boosting or attenuation based on the sound source directions of the first to n-th bands which are determined by the sound source direction determination unit; wherein the sound source direction determination unit includes first to n-th sound source directional angle analysis units corresponding to the first to n-th bands, wherein each of the first to n-th sound source directional angle analysis units has one-to-one correspondence with each of the first to n-th filters, and regards the corresponding filters as control targets for a boosting or attenuating process, wherein each of the first to n-th sound source directional angle analysis units allows the filter to be controlled to perform the boosting process when a sound source direction of a corresponding band is determined as a direction included in a predetermined angle range, and allows the filter to be controlled to perform the attenuating process when a sound source direction angle of the corresponding band is not determined as a direction included in the predetermined angle range; and wherein each of the first to n-th sound source directional angle analysis units allows the filter to be controlled to perform the attenuating process when the sound source direction is determined to be in a dispersion state.