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:
Mar. 04, 2003
Filed:
Feb. 29, 2000
Yuichiro Nakaya, Suginami-ku, JP;
Yoshito Nejime, Koganei, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An image coding method includes the steps of storing a reference image which is a decoded image of an image previously coded based on a first prediction image synthesized by performing motion compensation, estimating motion vectors based on a comparison of an input image to be coded and the reference image, and synthesizing a second prediction image by performing motion compensation using the motion vectors and the reference image. A rounding method used for pixel value interpolation in performing the motion compensation for synthesizing the first prediction image is one of a positive rounding method and a negative rounding method, and a rounding method used for pixel value interpolation in performing the motion compensation for synthesizing the second prediction image is a different one of the positive rounding method and the negative rounding method.