Fast Coding Unit Size Decision Based on Probabilistic Graphical Model in High Efficiency Video Coding Inter Prediction

  • JIANG Xiantao
    Department of Electronics and Information Engineering, Tongji University
  • SONG Tian
    Department of Electrical and Electronics Engineering, The University of Tokushima
  • SHI Wen
    Department of Electrical and Electronics Engineering, The University of Tokushima
  • KATAYAMA Takafumi
    Department of Electrical and Electronics Engineering, The University of Tokushima
  • SHIMAMOTO Takashi
    Department of Electrical and Electronics Engineering, The University of Tokushima
  • WANG Lisheng
    Department of Electronics and Information Engineering, Tongji University

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Abstract

<p>In this work, a high efficiency coding unit (CU) size decision algorithm is proposed for high efficiency video coding (HEVC) inter coding. The CU splitting or non-splitting is modeled as a binary classification problem based on probability graphical model (PGM). This method incorporates two sub-methods: CU size termination decision and CU size skip decision. This method focuses on the trade-off between encoding efficiency and encoding complexity, and it has a good performance. Particularly in the high resolution application, simulation results demonstrate that the proposed algorithm can reduce encoding time by 53.62%-57.54%, while the increased BD-rate are only 1.27%-1.65%, compared to the HEVC software model.</p>

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