Object-by background information coding apparatus and method
US5686956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An object based background information coding apparatus and method for an MPEG-4 system codes background images for effectively compressing image data corresponding to an MPEG-4 profile and for compensating the background information without errors. The apparatus includes a first region extraction circuit for extracting a changed region using a motion vector obtained from a current input image and an image inputted after the current image; a second region extraction circuit for extracting an uncovered region from the input image of the first region extraction circuit; an uncovered background extracting circuit for extracting uncovered background information from the changed region information extracted from the first region extraction circuit; a background memory storing region information of the first and second region extraction circuits; a surrounding value compensation circuit for compensating uncovered background information of the uncovered background extracting circuit for a surrounding value of the background memory; a background synthesizing circuit for uncovered background information compensated by the surrounding value compensation circuit and the background information…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.