LOSSLESS VIDEO CODING USING VARIABLE BLOCK-SIZE MC AND 3D PREDICTION OPTIMIZED FOR EACH FRAME (FriAmOR4)

Author(s) : Ichiro Matsuda (Science University of Tokyo, JAPAN) Taichiro Shiodera (Science University of Tokyo, JAPAN) Susumu Itoh (Science University of Tokyo, JAPAN)

Abstract : This paper proposes an efficient lossless coding scheme for video signals. The coding scheme utilizes a novel block-adaptive 3D prediction method which predicts a video signal at each pel based on both the current frame and the motion-compensated previous frame. The resulting prediction errors are encoded using a kind of context-adaptive arithmetic coding. In order to improve coding efficiency, not only prediction coefficients of the 3D linear prediction but also motion vectors in all the blocks are iteratively optimized for each frame so that a coding rate of prediction errors can have a minimum. Moreover, a variable block-size motion compensation technique is employed for efficient representation of motion information. Experimental results show that coding rates of the proposed scheme are 18-55% lower than those of the JPEG-LS based intra-frame coding scheme.

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