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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (Supplement 1): 101-105    DOI: 10.1631/jzus.2006.AS0101
Original Paper     
Improved fast intra prediction algorithm of H.264/AVC
Liu Qiong, Hu Rui-Min, Zhu Li, Zhang Xin-Chen, Han Zhen
School of Computer, Wuhan University, Wuhan 430079, China; The Key Laboratory of Multimedia and Network Communications Engineering, Wuhan University, Wuhan 430079, China
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Abstract  With advanced prediction modes of intra prediction, intra coding of H.264/AVC offers significant coding gains compared with previous video coding standards. It uses an important tool called Lagrangian rate-distortion optimization (RDO) technique to decide the best coding mode for a block, but the computational burden is extremely high. In this paper, we proposed an improved fast intra prediction algorithm including block type selection and mode decision algorithm based on analysis of edge feature of a block. Our algorithm filters out unlikely block type and candidate modes to reduce the RDO calculations. Experimental results showed that the proposed algorithm can reduce the computation complexity of intra prediction from 52.90% to 56.31%, with 0.04 dB PSNR degradation and 2% increase of bit rate.

Key words： H.264      AVC      Intra prediction      Video coding     
Received: 20 November 2005     
CLC:  TN919.8  
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Liu Qiong
Hu Rui-Min
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Zhang Xin-Chen
Han Zhen
Cite this article:

Liu Qiong, Hu Rui-Min, Zhu Li, Zhang Xin-Chen, Han Zhen. Improved fast intra prediction algorithm of H.264/AVC. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(Supplement 1): 101-105.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.AS0101     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/ISupplement 1/101

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