Circuit for improving the stereo image separation of a stereo signal
US5761313A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
By using special frequency response manipulation in the difference channel of a stereo signal, the stereo image will appear to extend beyond the actual placement of the loudspeakers. This is accomplished by shaping the difference channel response to simulate the response one would be subjected to if the sources were physically moved to the virtual positions. The circuit includes a summing and high frequency equalization circuit to which the left and right stereo signals are applied, and a difference forming and human ear equalization circuit also to which the left and right stereo signals are applied. The outputs from these circuits are cross-coupled to form left and right channel outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.