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US 2001/0024473 A1Published application
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 includes 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.
Claims9
A method for coding an image comprising the steps of:
- calculating motion vectors of vertices of a patch in an image being encoded;
- and
- outputting horizontal and vertical components of said motion vectors of said vertices and information specifying that values of the horizontal and vertical components of a motion vector for each pixel in said patch are an integral multiple of 1/d of a distance between adjacent pixels, where d is an integer not less than 2.
A video coder for coding an image comprising:
- means for calculating motion vectors of vertices of a patch in an image being encoded;
- and
- means for outputting horizontal and vertical components of said motion vectors of said vertices and information specifying values of the horizontal and vertical components of a motion vector for each pixel in said patch are an integral multiple of 1/d of a distance between adjacent pixels, where d is an integer not less than 2.
A method for coding an image comprising the steps of:
- storing a reference image;
- calculating motion vectors of vertices of a patch in an input image by carrying out motion compensation between said input image and said reference image, in which all pixels associated with a same patch are not restricted to have a common vector and horizontal and vertical components of a motion vector for each pixel can assume an arbitrary value other than an integral multiple of a distance between adjacent pixels;
- and
- transmitting information of said motion vectors of vertices and information specifying that values of horizontal and vertical components of a motion vector for each pixel in said patch are integral multiples of 1/d1 and 1/d2, respectively, where each of d1 and d2 is an integer not less than 2, of a distance between adjacent pixels.
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Dependencies are inferred from the claim text.