Electronic memory state reallocation system for improving the resolution of color coding video systems
US5051929A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1987 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Oct 19, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides means and methods for generating high resolution color computer generated graphic elements, such as lines, circles and curves, using a modified color-under coding system. A portion of the original luminance grey scale is reassigned or reallocated for substitution with data for high resolution graphic elements. High resolution graphic data are introduced by a user-operated input device via a control device such as a computer. The input luminance signal is digitally limited and stored in video random access memory (VRAM). A level detector detects the Y signal level to determine the presence of certain Y signal levels. Memory look-up tables provide appropriate user-determined substitute values for the Y, I and Q data values where certain, preselected Y signal levels are detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.