Method and apparatus for efficient presentation of high-quality three-dimensional audio
US5596644A · kind A · utility
70Cited by
7References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1994 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Oct 27, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Spatialization of soundfields is accomplished by filtering audio signals using filters having unvarying frequency response characteristics and amplifying signals using amplifier gains adapted in response to signals representing sound source location and/or listener position. The filters are derived using a singular value decomposition process which finds the best set of component impulse responses to approximate a given set of head related transfer functions. Efficient implementations for rendering reflection effects, and for spatializing multiple sound sources and/or generating multiple output signals are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.