Teletext decoder having a register array for operating on pixel words
US4595952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1983 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Nov 29, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A teletext decoder extracts digital information from a video signal for displaying graphics and textual information embedded in the video signal. The decoder includes a prefix processor responding to user supplied commands for selecting and storing the pertinent embedded information into a memory. The microcomputer reads the data provided by the prefix processor, converts it to pixel words representing picture elements and restores the converted data into the memory. The decoder includes a display processor which reads more than one pixel word at a time when accessing the memory, and translates each pixel word to 3 groups of color codes and to a one-bit transparency code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.