Method for practical implementation of sound field reproduction based on surface integrals in three dimensions
US9338572B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 7, 2012 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Jan 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for 3D sound field reproduction from a first audio input signal using a plurality of loudspeakers distributed over a loudspeaker surface aiming at synthesizing a 3D sound field within a listening area in which none of the loudspeakers are located with the sound field radiating from a virtual source, includes the steps of calculating positioning filters using virtual source description data and loudspeaker description data according to a sound field reproduction technique derived from a surface integral, applying positioning filter coefficients to filter the first audio input signal to form second audio input signals. Loudspeakers are positioned for a sampling of the loudspeaker surface into second loudspeaker surfaces for which the loudspeaker spacing is smaller for loudspeakers located in the horizontal plane than for elevated loudspeakers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.