Color signal processing circuit in color VTR
US5621537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Aug 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/89
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a home VTR, a color signal processing circuit is capable of reproducing a color signal recorded as a lower converted color signal and preventing color unevenness which necessarily creates during visualizing. To avoid an adverse effect due to phase fluctuation created during reproducing, the color signal processing circuit is provided with a circuit for synchronizing a carrier with the phase fluctuation. In this circuit, an open loop circuit is connected to a closed loop circuit to achieve such synchronization. Specifically, the phase fluctuation in a low-frequency range is synchronized by a feedback feature of the closed loop circuit, while the phase fluctuation in a high-frequency range is synchronized by a detecting feature of the closed loop circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.