Abstract
ABSTRACT The H.264/AVC 1 standard of the Video Coding Experts Group (VCEG) and the Moving Pictures Experts Group(MPEG), also known as MPEG-4 AVC, achieves signicant compression gain compared to its predecessors. Notonly Inter yet also Intra coding has been greatly improved. Today VCEG encourages coding ec iency improve-ments through the KTA (Key Technical Area) software, 2 a collection of tools that improves the H.264/AVCstandard, to prepare the next gener ation video codec. The work propose d in this paper has been designed inthis context.An Intra coding scheme is proposed. A macroblock is split in 1D partitions to reduce the distance betweenthe pixel to encode and its predictors. Three scan orders for the partitions are available: a raster scan, a bi-directional scan and a hierarchical scan. Predictors adapted to the shape and characteristics of the 1D partitionsare dened and nally a 1D-DCT is applied to the residual signal. Experimental results report an average bitratesavings of 8.6% compared to the H.264/AVC standard (up to 19% on a particular sequence).Keywords: Video coding, Intra prediction, Macroblock partitioning, Scan order
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