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:
Aug. 17, 1999
Filed:
Dec. 12, 1996
Satoshi Miyaji, Tokyo, JP;
Shuichi Matsumoto, Tokyo, JP;
Kokusai Denshin Denwa Co. Ltd., Tokyo, JP;
Abstract
A method for coding moving pictures using motion compensation for prediction has a step of producing motion vectors for a macroblock in a previous frame, the macroblock corresponding to a macroblock to be coded in a current frame, a step of motion-compensating the macroblock in the previous frame by using the produced motion vector to generate a motion compensated macroblock, a step of calculating a prediction error from the motion compensated macroblock and the macroblock to be coded in the current frame, a step of deciding whether the macroblock to be coded in the current frame is a significant macroblock or a non-significant macroblock by comparing the calculated prediction error with a threshold value, a step of coding the macroblock to be coded in the current frame when the macroblock is decided as the significant macroblock, and a step of transmitting only the produced motion vector when the macroblock is decided as the non-significant macroblock. Particularly, the produced and transmitted motion vector is selected to one with the minimum length within a range in which the macroblock to be coded is decided as the non-significant macroblock.