Image data processing device with multi-processor
US5434968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1994 |
| Grant date | Jul 18, 1995 |
| Priority date | — |
| Expiry date | Jan 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T1/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image data processing device having a multi-processor includes a plurality of local frame buffers, each coupled to a different one of a plurality of processors, and an image mixing device for mixing image data outputted from the local frame buffers periodically and transferring the mixed data to a screen, Each of the local frame buffers includes a demand paging device for assigning a memory unit of predetermined size to only a portion of the screen accessed by one of the plurality of processors to which the local frame buffer is coupled. The demand paging device includes a patch table for storing an assigning situation for the rectangular areas of the screen, Each patch of the patch table corresponds to the rectangular area of the screen, and stores information regarding an access to a portion of the screen by the one of the plurality of processors and address information of a memory unit assigned to the portion of the screen accessed by the one of the plurality of processors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.