Early detection algorithms for 4×4 and 8×8 all-zero blocks in H.264/AVC

Qin Liu*, Yiqing Huang, Takeshi Ikenaga


研究成果: Conference article査読


H.264 is the latest HDTV video compression standard, which provides a significant improvement in coding efficiency at the cost of huge computation complexity. Provided that discrete cosine transform coefficient(DCT) blocks can be quantized to all zeros, the process of transform and quantization on this all-zero block(AZB) can be skipped, which will reduce significant redundant computations. In this paper, a theoretical analysis is performed for the sufficient condition for AZB detection. As a result, two partial sum of absolute differences (SAD) based 4×4 AZB detection algorithm are derived. Furthermore, a quantization parameter (QP) oriented 8×8 AZB detection algorithm is proposed according to the AZB's statistical analysis. Experimental results show that the proposed algorithms outperform the previous methods in all cases and achieve major improvement of computation reduction in the range from 12.16% to 42.68% for 4×4 transform, from 4.86% to 73.55% for 8×8 transform. The computation reduction increases as the QP increases. copyright by EURASIP.

ジャーナルEuropean Signal Processing Conference
出版ステータスPublished - 2008 12月 1
イベント16th European Signal Processing Conference, EUSIPCO 2008 - Lausanne, Switzerland
継続期間: 2008 8月 252008 8月 29

ASJC Scopus subject areas

  • 信号処理
  • 電子工学および電気工学


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