Patent ID: 11875774
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. A sound image localizing method comprising:
a directivity control filter designing step of computing a directivity control filter from a desired directional characteristic;
a filter coefficient correction step of correcting the directivity control filter computed in the directivity control filter designing step; and
a convolution operation step of computing an output acoustic signal by performing convolution of an input acoustic signal and the directivity control filter corrected in the filter coefficient correction step, wherein filters that respectively correspond to speakers constituting a speaker array are computed in the directivity control filter designing step and the filter coefficient correction step, an acoustic beam is generated using directivity control by the speaker array, and the acoustic beam is caused to be reflected from a wall surface or a ceiling to generate a virtual sound source.