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Fast Intra 4X4 Mode Elimination Approaches for H.264

  • Dajun Wu
  • Keng Pang Lim
  • Si Wu
  • Zhicheng Zhou
  • Chi Chung Ko
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3893)

Abstract

This paper presents two fast Intra 4x4 mode elimination approaches for H.264. They terminate at an early stage during the Intra 4x4 mode decision process. The lossless approach checks cost after each 4x4 block Intra mode decision, and jumps directly to Intra 16x16 mode decision if the cost is higher than minimum cost of Inter mode. The lossy approach shortens Intra 4x4 mode decision process by using some low-cost preprocessing to make prediction, and checking if the cost is higher than some fraction of min cost of Inter mode. Experimental results show that the lossless approach can reduce the encoding time by 7.5% on average. The lossy approach can reduce encoding time by 13.87% on average with average PSNR loss of 0.048 db and average bit rate increment of 0.76%.

Keywords

Motion Estimation Mode Decision Intra Prediction Encode Time Inter Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Dajun Wu
    • 1
  • Keng Pang Lim
    • 1
  • Si Wu
    • 1
  • Zhicheng Zhou
    • 1
  • Chi Chung Ko
    • 2
  1. 1.Institute for Infocomm ResearchSingapore
  2. 2.Department of ECENational University of SingaporeSingapore

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