| 摘要 |
A method for motion compensated encoding of video data. The method comprises the steps of:generating a motion vector field of video pixels of a current frame to be coded based on a reference frame;obtaining segmenting information defining the division of the current frame into image segments;coding the motion vector field of an image segment Sk to provide compressed motion information comprising a motion coefficient vector ck comprising a set of motion coefficients ci, such that ci.fi(x,y) represents the motion vector field, whereby fi(x,y) defines a certain set of basis functions, wherein i is an index defining a correspondence between each basis function and a corresponding motion coefficient;predicting a motion vector field of a subsequent image segment SL with a set of predicted motion coefficients pi based upon the previously generated motion coefficient vector ck;generating for the subsequent segment SL a set of refinement motion coefficients ri corresponding to the difference between the set of motion coefficients ci and a set of predicted motion coefficients pi such that pi+ri=ci.Another aspects of the invention comprise corresponding video codec, mobile station, telecommunications network and computer program product.
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