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US 6,285,713 B1Granted
Video coding/decoding system and video coder and video decoder used for the same system
AssigneeHitachi, Ltd.
InventorsYuichiro Nakaya, Junichi Kimura
Life of this patent
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Abstract
A method and apparatus for coding an image including calculation of motion vectors of vertices of a patch in an image being encoded and providing an output of horizontal and vertical components of the motion vectors of the vertices and information specifying that values of the horizontal and vertical components of a motion vector for each pixel in the patch are integral multiples of 1/d of a distance between adjacent pixels, where d is an integer not less than 2.
Claims6
A method for decoding an image comprising the steps of:
- receiving information of motion vectors of vertices of a patch in an image being decoded, and information specifying that values of horizontal and vertical components of a motion vector for each pixel in said patch are limited to integral multiples of 1/d of the distance between adjacent pixels, where d is an integer not less than 2;
- calculating a motion vector for each pixel in said patch from said motion vectors of vertices of a patch, limiting horizontal and vertical components of said motion vector for each pixel to an integer multiple of said 1/d;
- and
- synthesizing said image being decoded by using said motion vector for each pixel.
1 more element
A video decoder comprising:
- means for receiving information of motion vectors of vertices of a patch which composes an image being decoded, and information specifying that values of horizontal and vertical components of said motion vector for each pixel in said patch are limited to integral multiples of 1/d of the distance between adjacent pixels, were d is an integer not less than 2;
- and
- means for calculating a motion vector for each pixel in said patch from said motion vectors of vertices of a patch, limiting the horizontal and vertical components of said motion vector for each pixel to integral multiples of said 1/d, and synthesizing said image being decoded by using said motion vector for each pixel.
Dependencies are inferred from the claim text.