Video signal processing apparatus with automatic picture quality control function and signal processing circuit
US5436729A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1992 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Nov 27, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/7921
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal processing apparatus with an automatic picture quality control function comprises a reproduction unit for reproducing a video signal from a video signal recording medium, an APL detector and a noise detector for detecting as a DC potential signal two different pieces of information affecting the picture quality contained in the video signal reproduced by the reproduction unit, a DC potential shift circuit for shifting the smaller of the two DC potential signals detected by the detectors in accordance with the reproduction mode of the reproduction apparatus, an input terminal for inputting a variable DC potential, a switching unit for selecting the output of the DC potential shift circuit or the input from the input terminal, and a picture quality control circuit for controlling the picture quality of the video signal reproduced at the reproduction apparatus by the DC potential from the switching unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.