The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 1997
Filed:
Jun. 07, 1995
Seong-Jun Oh, Seoul, KR;
Sung-Moon Chun, Seoul, KR;
Joo-Hee Moon, Seoul, KR;
Jae-Kyoon Kim, Seoul, KR;
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 of the memory; an error region extracting circuit for extracting an error region from uncovered background information synthesized by the background synthesizing circuit; a sampling circuit for sampling an extracted error region information; and a differential pulse code modulation circuit for differential-pulse-code-modulating uncovered error region information sampled by the sampling circuit.