Fast intra-prediction model selection for H.264 codec

Chang-sung Kim; Qing Li; C. -C. Jay Kuo

doi:10.1117/12.511393

19 November 2003 Fast intra-prediction model selection for H.264 codec

Chang-sung Kim, Qing Li, C. -C. Jay Kuo

Author Affiliations +

Proceedings Volume 5241, Multimedia Systems and Applications VI; (2003) https://doi.org/10.1117/12.511393
Event: ITCom 2003, 2003, Orlando, Florida, United States

Abstract

We investigate the encoding speed improvement for H.264 with a special focus on fast intra-prediction mode selection in this work. It is possible to adopt the rate-distortion (RD) optimized mode in H.264 to maximize the coding gain at the cost of a very high computational complexity. To reduce the complexity associated with the intra-prediction mode selection, we propose a two-step fast algorithm. In the first step, we make a course-level decision to split all possible candidate modes into two groups: the group to be examined further and the group to be ignored. The sizes of these two groups are adaptively determined based on the block activities. Then, in the second step, we focus on the group of interest, and consider an RD model for final decision-making. It is demonstrated by experiment results that the proposed scheme performs 5 to 7 time faster than the current H.264 encoder (JM5.0c) with little degradation in the coding gain.

Citation Download Citation

Chang-sung Kim, Qing Li, and C. -C. Jay Kuo "Fast intra-prediction model selection for H.264 codec", Proc. SPIE 5241, Multimedia Systems and Applications VI, (19 November 2003); https://doi.org/10.1117/12.511393

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