US Patent 7298781 Method of coding and decoding image

Patent 7298781 was granted and assigned to Renesas Technology Corp on November, 2007 by the United States Patent and Trademark Office.

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Yuichiro Nakaya0

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Patent abstract

A method of simplifying the arithmetic operation in a global motion compensation process approximates the motion vector field of the whole image without using many parameters. Motion vectors in the global motion compensation are found by the interpolation and/or extrapolation of the motion vectors of a plurality of representative points 602, 603 and 604 having particular features in the spatial distance thereof. Since the shift operation can be substituted for the division for synthesizing a predicted image of global motion compensation, the processing using a computer or a dedicated hardware is simplified.

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