Video camera having a solid-type image sensor
US5510835A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/136
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Output signals of a solid state image sensor 1 are processed in a signal processing circuit 3 and then supplied as brightness signals to a variable gain circuit 4, and gain of the circuit is varied for each color separation filter provided in the solid state image sensor 1, and in the case of achromatic objects, signal amounts for each color separation filter are made equal and moire is suppressed. In such a video camera, a noise reducer circuit 5 is provided and output signals of the variable gain circuit 4 are supplied to the noise reducer circuit 5 and adding processing is carried out during a plurality of horizontal scanning periods neighboring vertically thereby level variation (line pair) of the brightness signals for each horizontal scanning period is suppressed. A vertical resolution correction circuit 6 generates a vertical resolution correction signal from output signals of the signal processing circuit 3 there by degradation of the vertical resolution of the brightness signals is corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.