Spatial resolution of the sound field for multi-channel audio playback systems by deriving signals with high order angular terms
US8103006B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 2007 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Jan 31, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Audio signals that represent a sound field with increased spatial resolution are obtained by deriving signals that represent the sound field with high-order angular terms. This is accomplished by analyzing input audio signals representing the sound field with zero-order and first-order angular terms to derive statistical characteristics of one or more angular directions of acoustic energy in the sound field. Processed signals are derived from weighted combinations of the input audio signals in which the input audio signals are weighted according to the statistical characteristics. The input audio signals and the processed signals represent the sound field as a function of angular direction with angular terms of one or more orders greater than one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.