Lossless video coding using variable block-size MC and 3D prediction optimized for each frame
Lossless video coding using variable block-size MC and 3D prediction optimized for each frame
复制标题
使用针对每帧优化的可变块大小 MC 和 3D 预测进行无损视频编码
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
S. Itoh
中科院分区：
文献类型：
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作者：
I. Matsuda;T. Shiodera;S. Itoh
提出了一种高效的视频信号无损编码方案。该编码方案采用了一种新颖的块自适应3D预测方法，该方法基于当前帧和运动补偿的前一帧来预测每个像素处的视频信号。所得到的预测误差使用一种上下文自适应算术编码进行编码。为了提高编码效率，不仅对三维线性预测的预测系数进行迭代优化，而且对各块中的运动向量进行迭代优化，使预测误差的编码率最小。此外，为了有效地表示运动信息，采用了可变块大小的运动补偿技术。实验结果表明，该方案的编码率比基于JPEG-LS的帧内编码方案低18 ~ 55%。
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.