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    Method and apparatus for determining a threshold for SKIP mode in video coding
    2.
    发明公开
    Method and apparatus for determining a threshold for SKIP mode in video coding 有权
    Verfahren und Vorrichtung zum Bestimmen eines Grenzwertes eines SKIP-Modes in Videokodierung

    公开(公告)号：EP1845731A1

    公开(公告)日：2007-10-17

    申请号：EP06300362.8

    申请日：2006-04-13

    申请人： Thomson Licensing

    发明人： Zhu, Li Hua 8F, Bldg. A, Technology Fortune Center ,  Yin, Peng ,  Wang, Charles Rm 03-09, 8F, Building A

    IPC分类号： H04N7/26

    CPC分类号： H04N19/507 ,  H04N19/124 ,  H04N19/132 ,  H04N19/14 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61

    摘要： The objective of video compression is to reduce the redundancy of the temporal and spatial dimension. Skipping of MBs or blocks plays a key role when reducing the codec complexity and data rate. A method for determining a threshold for deciding whether motion estimation, DCT and quantization may be skipped on macroblock level, comprises determining a quantization parameter, quantizing and inverse quantizing (λ1) a picture (f x,cur ) on macroblock level, wherein a reconstructed picture (f x,rec ) is obtained, calculating a difference (SAD) between the picture (f x,cur ) and the reconstructed picture (f x,rec ), calculating the mean (m SAD ) and standard deviation (σ SAD ) of differences between the current and reconstructed picture, calculating a threshold (SAD Threshold,Qp ) using the mean (m SAD ) and standard deviation (σ SAD ) to determine a statistical confidence interval, and storing the threshold value (SAD Threshold,QP ) associated with the quantization parameter.

    摘要翻译： 视频压缩的目的是减少时间和空间维度的冗余。 减少编解码器复杂度和数据速率时，MB或块的跳过起着关键作用。 一种用于确定用于决定是否可以在宏块级别跳过运动估计，DCT和量化的阈值的方法包括确定量化参数，量化和反量化（»1）宏块级上的图像（fx，cur），其中重构 获得图像（fx，rec），计算图像（fx，cur）和重构图像（fx，rec）之间的差（SAD），计算平均值（m SAD）和标准差（ÃSAD） 使用平均值（m SAD）和标准偏差（SAD）计算阈值（SAD阈值，Qp）以确定统计置信区间，以及存储与所述阈值相关联的阈值（SAD阈值，QP） 量化参数。