Method and device for improved sound field rendering accuracy within a preferred listening area
US8437485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2008 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Apr 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a device for sound field reproduction from a first audio input signal uses a plurality of loudspeakers for synthesizing a sound field within a preferred listening area in which none of the loudspeakers are located and therefore described as emanating from a virtual source. The method further includes the steps of calculating a plurality of positioning filter coefficients using virtual source description data and loudspeaker description data according to a sound field reproduction technique; and modifying the first audio input signal using the positioning filter coefficients to form second audio input signals. A loudspeaker ranking of the importance of each loudspeaker for the synthesis of the sound field within the preferred listening area is therefore defined. Then, second audio input signals are modified according to the loudspeaker ranking to form third audio input signals. Finally, the loudspeakers are alimented with the third audio input signals which synthesize a sound field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.