Video recorder having means for maintaining constant the amplitude of the frequency-modulated signal
US4193084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1977 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Oct 13, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In apparatus for recording, or otherwise transmitting, video or other information signals, and in which at least a portion of the signal to be recorded, for example, the luminance component of a color video signal, is frequency modulated and then passed through a filter for limiting the frequency band of the resulting frequency modulated component or signal which is recorded; a signal processor, such as, an automatic gain control or limiter, acts on the frequency modulated output of the filter to eliminate or compensate for amplitude variations that may occur therein by reason of the filter, for example, at portions of the signal where substantial pre-emphasis was applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.