FM signal demodulator for video signal reproducing apparatus
US4882618A · kind A · utility
2Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An FM demodulator for a video signal reproducing apparatus, which is responsive to an input FM luminance signal. The FM demodulator includes an FM demodulation circuit for changing the input FM signal to a base band luminance signal and a noise removing circuit for substantially removing noise from the base band luminance signal. The noise removing circuit is comprised of a clipping circuit for removing portions of the base band luminance signal carrying the noise and an amplitude expansion circuit for increasing the amplitude of the luminance signal at the location of the removed portions to a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.