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Title:
SOUND IMAGE LOCALIZATION DEVICE, SOUND IMAGE LOCALIZATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/158433
Kind Code:
A1
Abstract:
Provided are a sound image localization device, a sound image localization method, and a program which allow a virtual speaker to handle a wide frequency range and which enable high-quality sound reproduction. A sound image localization device 10 comprises: a directivity control filter design unit 11 that calculates a directivity control filter from desired directional characteristics; a filter coefficient correction unit 12 that performs correction with respect to the directivity control filter calculated by the directivity control filter design unit 11; and a convolution computing unit 13 that convolutes an input acoustic signal and the directivity control filter corrected by the filter coefficient correction unit 12, and calculates an output acoustic signal. The directivity control filter design unit 11 and the filter coefficient correction unit 12 are used to calculate filters corresponding to respective speakers constituting a speaker array, an acoustic beam is created using directivity control by means of the speaker array, and a virtual sound source is created by causing the acoustic beam to be reflected by a wall surface or a ceiling.

Inventors:
IMAIZUMI KENTA (JP)
TSUTSUMI KIMITAKA (JP)
NAKADAIRA ATSUSHI (JP)
Application Number:
PCT/JP2020/001405
Publication Date:
August 06, 2020
Filing Date:
January 17, 2020
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04R1/40; G10K11/34; H04R3/00
Domestic Patent References:
WO2018116861A12018-06-28
Foreign References:
JP2006238155A2006-09-07
JP2015062269A2015-04-02
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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