Apparatus and method for producing virtual acoustic sound
US7215782B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2006 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Jan 23, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a sound image is generated by applying first and second copies of a first input audio signal to first and second audio channels, respectively, to generate first and second output audio signals for the sound image. Each output audio signal is generated by (1) applying the corresponding copy of the first input audio signal to a corresponding source placement unit (SPU) to generate M delayed, attenuated, and weighted audio signals, A>1; (2) applying each delayed, attenuated, and weighted audio signal to a corresponding eigen filter to generate one of M eigen-filtered audio signals; and (3) summing the M eigen-filtered audio signals to generate the corresponding output signal. In an alternative embodiment, M copies of a first input audio signal are eigen-filtered prior to applying first and second copies of the resulting eigen-filtered signals to first and second audio channels, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.