Horizontal contour emphasizing signal processor
US5543859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1995 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Apr 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved horizontal contour emphasizing signal processor is provided with a detector to detect a period during which luminance signal changes are produced, a generator to generate a rectangular-wave signal during this period, and a multiplier for multiplying a first horizontal contour emphasizing signal derived from the luminance signal to the rectangular-wave signal to generate a second horizontal contour emphasizing signal, and in this case, a preshoot is added to the input luminance signal waveform at the starting part of a radical waveform change and an overshoot is added at the ending part of the waveform change in order to perform finer horizontal contour emphasizing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.