Video display system comprising an index store for storing reduced versions of pictures to be displayed
US4649380A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1984 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Jun 11, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/227
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video display system includes a television monitor 1, a display generator 2, a display memory 3, a processor 4, and a main memory 13. The main memory 13 stores pages of text and pictures which can be selected for display. When a page is selected, the processor 4 controls its transfer from the main memory to the display memory where it is accessed by the display generator to produce the R, G, B display signals. The main memory 3 includes an index store 18 which contains indexing information which can be displayed in the form of index pages containing miniature aide memoire versions of the stored pages. In the aide memoire version of a text page, single dots represent respective characters of the text page. In the aide memoire version of a picture page, single dots represent respective discrete areas of the picture page. In the latter case, each dot has a color which is the average color of the area concerned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.