Signal processor for VTR which converts color under signals to color signals
US5526126A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 13, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jun 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first reproduced color under signal is delayed by one or two horizontal periods by a delay circuit, and this delayed second reproduced color under signal and the aforementioned first reproduced color under signal have their frequencies converted individually by first and second frequency converters into standard color signals. An oscillatory frequency signals of 2n of carriers for the aforementioned frequency conversions are divided to have the aforementioned carrier frequencies and to produce four carriers having phases of 0, 90, 180 and 270 degrees. These carriers are selectively fed to the first and second frequency converters by switches so that the two frequency-converted signals are subtracted or added in phase or in opposite phase to clear the noise (or crosstalk component), which is caused by the crosstalk between the tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.