Delay time calculation apparatus, delay time calculation method, and storage medium storing program therefor
US8275160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2009 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Sep 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A delay time calculation apparatus that enables all of speaker units constituting a speaker array to contribute to the formation of a combined wavefront directed to an area specified by a user. The delay time calculation apparatus includes a delay time calculation unit that calculates delay times of delayed audio signals supplied to the speaker units such that a ratio at which an evaluation object area is occupied by an area to which an acoustic wave output from each speaker unit reaches earlier than acoustic waves output from the other speaker units falls within a predetermined range. The evaluation object area is a target area to which a combined wavefront of acoustic waves output from the speaker units is directed, or is a perspective projection image of the target area onto a predetermined evaluation plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.