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:
Apr. 08, 1997
Filed:
Dec. 28, 1995
Graphics Communication Laboratories, Tokyo, JP;
Abstract
A motion estimation method and a motion estimation apparatus for calculating a motion vector to estimate a current picture partially forming a video sequence on the basis of first and second reference pictures partially forming the video sequence. In the method and apparatus, a reference block included in the first reference picture similar to a current block included in the current picture is specified and multiplied by a first coefficient. By performing a subtraction between the multiplied reference block and the current block, a template block indicative of a difference between the multiplied reference block and the current block is obtained. On the other hand, candidate blocks are calculated by multiplying, by a second coefficient, each reference blocks included in a search window partly forming the second reference picture. Based on the candidate blocks and template block are calculated distortion values each indicative of a difference between the following interpolated blocks and current block. Each of the interpolated blocks is indicative of a mean between the specified reference block of the first reference picture and each reference blocks of the search window.