An early mode decision algorithm for H.264 optimization

Authors:
Chaoke Pei;Shuyuan Yang;Li Gao;Weipeng Ma
Affiliations:
Graduate University of Chinese Academy of Sciences and Dept. of Digital System Integration Technique, Institute of Acoustics, CAS, Beijing, China;Dept. of Digital System Integration Technique, Institute of Acoustics, CAS, Beijing, China;Dept. of Digital System Integration Technique, Institute of Acoustics, CAS, Beijing, China;Graduate University of Chinese Academy of Sciences and Dept. of Digital System Integration Technique, Institute of Acoustics, CAS, Beijing, China
Venue:
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Year:
2009

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Abstract

The H.264 standard provides significantly high compression efficiency with multiple block size Motion Estimation adopted. However, the encoding time of Motion Estimation and Discrete Cosine Transform is dramatically increased as a result. An early mode decision algorithm is proposed in this paper to control the computation complexity. It derives a threshold to make mode decisions in advance. Experimental results show that 75.11% encoding time and 84.25% Motion estimation time can be saved on average with little PSNR dropped.