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http://dx.doi.org/10.5909/JBE.2010.15.3.380

Fast Intra Prediction Mode Decision using Most Probable Mode for H.264/AVC  

Kim, Dae-Yeon (DMS Lab. Dept. of Computer Engineering, Sejong University)
Kim, Jeong-Pil (DMS Lab. Dept. of Computer Engineering, Sejong University)
Lee, Yung-Lyul (DMS Lab. Dept. of Computer Engineering, Sejong University)
Publication Information
Journal of Broadcast Engineering / v.15, no.3, 2010 , pp. 380-390 More about this Journal
Abstract
The most recent standard video codec, H.264/AVC achieves significant coding efficiency by using a rate-distortion optimization(RDO). The RDO is a measurement for selecting the best mode which minimizes the Lagrangian cost among several modes. As a result, the computational complexity is increased drastically in encoder. In this paper, a method for fast intra prediction mode decision is proposed to reduce the RDO complexity. To speed up Intra$4{\times}4$ and Chroma Intra encoding, the proposed method decides the case that MPM (Most Probable Mode) is the best prediction mode. In this case, the RDO process is skipped, and only MPM is used for encoding the block in Intra$4{\times}4$. And the proposed method is also applied to the chroma Intra prediction mode in a similar way to the Intra$4{\times}4$. The experimental results show that the proposed method achieves an average encoding time saving of about 63% with negligible loss of PSNR (Peak Signal-to-Noise Ratio).
Keywords
H.264; MPEG-4 Part 10; Intra prediction; Fast mode decision;
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