Noise reduction circuit for video signal
US4652922A · kind A · utility
5Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Dec 26, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A noise reduction circuit for video signal comprises a first stage noise eliminating circuit for practically eliminating a noise component in the video signal, and a second stage noise eliminating circuit for eliminating a noise component remaining in an output of the first stage noise eliminating circuit. A video signal which is obtained from the second stage noise eliminating circuit has also been eliminated of a noise component existing immediately after a rise in the video signal, and the output video signal of the second stage noise eliminating circuit has been substantially eliminated of all the noise component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.