Signal peaking method and apparatus
US4263616A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is disclosed for peaking the amplitude transitions of an information-bearing signal such as a video signal. From the video signal, a control signal and a peaking signal are developed, each having magnitude variations related to and occurring in time correlation with amplitude transitions in the video signal. The control signal is employed to modulate the peaking signal such that when transitions in the control signal exceed a threshold amplitude, the peaking signal is coupled to an output terminal at or above a given gain level, and when the transitions in the control signal are less than the threshold amplitude, the peaking signal is coupled to an output terminal at a reduced but non-zero gain level. The modulated peaking signal appearing at the output terminal is combined with the video signal to cause relatively high level video transitions to receive a high level of peaking and relatively lower level video transitions to receive lesser peaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.