Virtual surround sound production circuit, planar sound source apparatus, and flat panel display device
US12081954B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 24, 2021 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Dec 6, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A virtual surround sound production circuit includes: a subtraction unit configured to perform subtraction operation on first and second signals to output a third signal; a first addition unit configured to perform addition operation on the first and second signals to output a center channel signal; a surround sound adjustment unit configured to adjust the third signal or another third signal that has undergone frequency compensation to output a fourth signal; a center compensation unit configured to adjust the center channel signal to output a fifth signal; a second addition unit configured to perform addition operation on the first, fourth and fifth signals to output a first output signal; a phase inverter unit configured to perform phase inversion on the fourth signal to generate a phase-inverted signal; and a third addition unit configured to perform addition operation on the second, fifth and phase-inverted signals to output a second output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.