Four-dimensional matrix Walsh transform for lossless compression of color video |
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Authors: | LI Yu CHEN He-xin SANG Ai-jun FENG Hua |
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Affiliation: | [1]College of Communication Engineering, Jilin University, Changchun 130025, China [2]School of Electrical and Information Engineering, Changchun Institute of Technology, Changchun 130012, China |
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Abstract: | This article presents a coding method for the lossless compression of color video.In the proposed method,four-dimensional matrix Walsh transform(4D-M-Walsh-T)is used for color video coding.The whole n frames of a color video sequence are divided into '3D-blocks' which are image width(row component),image height(column component),image width(vertical component)in a color video sequence,and adjacency(depth component)of n frames(Y,U or V)of the video sequence.Similar to the method of 2D-Walsh transform,4D-M-Walsh-T is 4D sub-matrices,and the size of each sub-matrix is n.The method can fully utilize correlations to encode for lossless compression and reduce the redundancy of color video,such as adjacent pixels in one frame or different frames of a video at the same time.Experimental results show that the proposed method can achieve higher lossless compression ratio(CR)for the color video sequence. |
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Keywords: | 4D-M-Walsh-T lossless compression compression ratio |
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