A pixel-wise directional intra prediction method

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• 作者：Yunfei Wang ; ^{wangyf03@mails.tsinghua.edu.cn} ; Jianwen Chen ^{jwchen@ee.ucla.edu} ; Yun He ^{hey@tsinghua.edu.cn}
• 关键词：Video coding ; Intra coding ; Directional intra prediction ; Pixel-wise ; H.264/AVC ; DCT ; RDOQ ; PDIP
• 刊名：Journal of Visual Communication and Image Representation
• 出版年：2012
• 期刊代码：141_10473203
• 类别：cp
• 出版时间：May, 2012
• 卷：23
• 期：4
• 页码：599-603
• 文件大小：497 K

摘要

In a decade where the prominence of video applications has become increasingly prevalent, the optimization of video coding processes remains as important as ever. The directional intra prediction has been proved as an effective tool for intra picture coding. However, in a directional intra prediction based coding structure, there is a considerable gap between the transform efficiency of DCT and the optimal transform KLT. In this paper, we analyze these problems and propose a pixel-wise directional intra prediction (PDIP) method to solve this problem. This method exploits the reconstruction value of the adjacent pixels to predict the current pixel, and keeps the block-based lossy coding structure of H.264/AVC. The proposed method can significantly improve the coding efficiency with little decoding complexity increment.