Image compression and decompression apparatus with reduced frame memory
US5513301A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image compression and decompression apparatus wherein the scale of a required frame memory is reduced to allow reduction of the circuit scale is disclosed. The image compression and decompression apparatus comprises first and second frame memories each of which is used as, upon compression processing, a pre-frame memory for storing digital image data before compression but as, upon decompression processing, a post-frame memory for storing digital image data after decompression. First and second compressed image memories are each used as, upon compression processing, a transmission buffer for storing data after compression but as, upon decompression processing, a reception buffer for storing data before decompression. Each of the two kinds of memories is constructed in a double buffer structure. Control of two kinds of memory controllers for controlling accessing to the two kinds of memories, compression and decompression processing, and sequence control are effected using a program.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.