Stereophonic signal processing apparatus
US6522751B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Jan 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stereophonic signal processing apparatus, capable of reproducing sounds of musical instruments in high fidelity while effectively eliminating vocal signals, includes a right filter combination 121 and 122 for extracting a right low-frequency signal and a right high-frequency signal from a right input signal, a left filter combination 111 and 112 for extracting a left low-frequency signal and a left high-frequency signal from a left input signal, a subtraction circuit 131 for subtracting a right input signal and a left input signal and thereby generating a vocal elimination signal, a right addition circuit 123 for adding a right low-frequency signal and a right high-frequency signal from the right filter combination to a vocal elimination signal from the subtraction circuit and thereby generating a right output signal, a left addition circuit 113 for adding a left low-frequency signal and a left high-frequency signal from the left filter combination to a vocal elimination signal from the subtraction circuit and thereby generating a left output signal, and a controller 140 for changing characteristics of both of the right filter combination and the left filter combination according…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.