Sound image localization device, sound image localization method, and program
US11875774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2020 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Nov 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2203/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a sound image localizing device, a sound image localizing method, and a program that enable a virtual speaker to reproduce sound in a wide frequency band with high sound quality. A sound image localizing device 10 includes a directivity control filter design unit 11 that computes a directivity control filter from a desired directional characteristic, a filter coefficient correction unit 12 that corrects the directivity control filter computed by the directivity control filter design unit 11, and a convolution operation unit 13 that computes an output acoustic signal by performing convolution of an input acoustic signal and the directivity control filter corrected by the filter coefficient correction unit 12. Filters that respectively correspond to speakers constituting a speaker array are computed by the directivity control filter design unit 11 and the filter coefficient correction unit 12, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.