Image enhancement system for television
US4268864A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Dec 5, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image enhancement system for television wherein conventionally generated detail signals representative of variations in the amplitude of the video signal are further processed before being added to the video signal. A first fractional amplitude portion of the generated detail signal is amplified and then subjected to severe coring and the resulting bi-polar signal is combined with a second fractional amplitude portion of the generated detail signal to produce a resultant detail signal having a contour which reduces the width of the edging effect at contrast transitions associated with conventional enhancement systems, and in which high frequency noise and other spurious signals are substantially reduced while retaining fine detail to enhance key parts of the television picture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.