Video signal noise reduction circuit for a video demodulator comprising a PLL
US5416530A · kind A · utility
1Cited by
6References
22Claims
0Family size
Inventor
Key dates
| Filing date | Dec 17, 1992 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video noise reduction is achieved by limiting the loop response bandwidth in a phase locked loop demodulator with a high-pass RC network connected between two oppositely phased video signals in the phase detector for out-phasing a high frequency component of the loop response bandwidth. Easy user adjustment allows viewable video images to be obtained from very noisy signals in deep fringe reception areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.