Video sharpness control device and method
US6330038A · kind A · utility
7Cited by
9References
35Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1997 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device for enhancing the sharpness of a video image. The luminance signal portion of a television signal is boosted in its upper frequency range, e.g., between about 2.0 MHz and about 4.25 MHz. This enhancement of the luminance signal accentuates the transitions between the high brightness levels and low brightness levels of the luminance signal. The resulting video image appears much sharper because this quicker transition reduces the amount of signal carrying intermediate brightness information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.