Edge gradient based fast inter motion estimation for H.264/AVC

Zhenyu Liu, Yang Song, Yiqing Huang, Ngfeng Li, Satoshi Goto, Takeshi Ikenaga

研究成果: Conference contribution

3 引用 (Scopus)

抜粋

H.264/AVC coding standard processes variable block size (VBS) motion estimation(ME) on multiple reference frames (MRF) to improve the coding gain. However, the computation is also increased in proportion to the product of the reference frame number and the inter modes. Through mathematical analysis, it is illustrated that the motion-compensated prediction error is mainly determined by the edge gradient amplitude. The image block being rich of texture and sharp edges contains much high frequency signal and this nature makes VBS MRF ME essential. The spatial homogeneity of a block is decided by its maximum edge gradient and its threshold for the edge gradient detection, which is 5 times quantization parameter (QP), is derived from rate-distortion theory. For the homogenous block, its ME computation for the futile reference frames and inter modes can be saved. Through evaluating the edge gradient, the block motion speed can be estimated to reduce the search area of integer ME. Based on the homogeneity of one 8×8 block, its Lagrangian Multiplier is also optimized to improve the coding quality. Moreover, we also provide a fast 'skip_mb' detection algorithm based on Hadamard co-efficients and the current QP. Experimental results show that 61.4%-88.9% computation can be saved by our approaches with the competitive coding quality as the exhaustive search algorithm.

元の言語English
ホスト出版物のタイトルISPA 2007 - Proceedings of the 5th International Symposium on Image and Signal Processing and Analysis
ページ52-57
ページ数6
DOI
出版物ステータスPublished - 2007 12 1
イベントISPA 2007 - 5th International Symposium on Image and Signal Processing and Analysis - Istanbul, Turkey
継続期間: 2007 9 272007 9 29

出版物シリーズ

名前ISPA 2007 - Proceedings of the 5th International Symposium on Image and Signal Processing and Analysis

Conference

ConferenceISPA 2007 - 5th International Symposium on Image and Signal Processing and Analysis
Turkey
Istanbul
期間07/9/2707/9/29

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Signal Processing

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  • これを引用

    Liu, Z., Song, Y., Huang, Y., Li, N., Goto, S., & Ikenaga, T. (2007). Edge gradient based fast inter motion estimation for H.264/AVC. : ISPA 2007 - Proceedings of the 5th International Symposium on Image and Signal Processing and Analysis (pp. 52-57). [4383663] (ISPA 2007 - Proceedings of the 5th International Symposium on Image and Signal Processing and Analysis). https://doi.org/10.1109/ISPA.2007.4383663