Adaptive motion vector field coding

Details Adaptive motion vector field coding Adaptive motion vector field coding

2007-01-09

2007-01-09

An, Shawn S. (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240120, C375S240270, C375S240260, C375S240140, C382S236000, C382S238000, C382S239000, C348S699000

Reexamination Certificate

active

10795083

ABSTRACT:
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 Skto provide compressed motion information comprising a motion coefficient vector ckcomprising 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 SLwith a set of predicted motion coefficients pibased upon the previously generated motion coefficient vector ck;generating for the subsequent segment SLa set of refinement motion coefficients ricorresponding to the difference between the set of motion coefficients ciand a set of predicted motion coefficients pisuch 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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