Television aperture correction system having gateable coring means for noise cancellation
US3995108A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | May 21, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An aperture correction system employing a tapped delay line includes an integral detection/gating circuit, whereby the combination generates an improved video detail signal by removing the objectionable noise and low amplitude components which are emphasized during the aperture correction process, while retaining the original shape of the high frequency video detail transitions as enhanced by the aperture correction process. The objectionable noise cancellation is provided by selectively gating the aperture correction signal via the detection/gating circuit in response to a selected gating waveform provided from the video detail signal itself. The detection/gating circuit may be selectively disabled to cause severe attenuation of the waveform at selected low and high frequencies outside the passband of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.