US 11,875,774 B2
Sound image localization device, sound image localization method, and program
Kenta Imaizumi, Musashino (JP); Kimitaka Tsutsumi, Musashino (JP); and Atsushi Nakadaira, Musashino (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/426,761
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed Jan. 17, 2020, PCT No. PCT/JP2020/001405
§ 371(c)(1), (2) Date Jul. 29, 2021,
PCT Pub. No. WO2020/158433, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-016881 (JP), filed on Feb. 1, 2019.
Prior Publication US 2022/0101825 A1, Mar. 31, 2022
Int. Cl. G10K 11/34 (2006.01); H04R 1/32 (2006.01); H04R 1/40 (2006.01)
CPC G10K 11/343 (2013.01) [H04R 1/323 (2013.01); H04R 1/403 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A sound image localizing device comprising:
a directivity control filter design unit, including one or more processors, configured to compute a directivity control filter from a desired directional characteristic;
a filter coefficient correction unit, including one or more processors, configured to correct the directivity control filter computed by the directivity control filter design unit; and
a convolution operation unit, including one or more processors, configured to compute an output acoustic signal by performing convolution of an input acoustic signal and the directivity control filter corrected by the filter coefficient correction unit, wherein filters that respectively correspond to speakers constituting a speaker array are computed by the directivity control filter design unit and the filter coefficient correction unit, 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.