Character and other graphical generating systems for video display
US5003303A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1990 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Feb 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A character generating system is disclosed having a source of batches of video keying signals representing different characters combined with further keying signals representing a background for the respective character. The video keying signals are confined to one value range and said further keying signals are confined to a different value range. The system effects spatial transformation of the combined signals and responds to the values of the spatially transformed combined signals to derive shape signals corresponding to the further keying signals and to derive shade signals corresponding to the video keying signals. In response to the shape and shade signals different video signals are provided respectively representing the character and the background both spatially transformed as the combined signals were spatially transformed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.