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    • 9. 发明申请
    • ENTROPY CODING OF MOTION VECTOR DIFFERENCES
    • 运动矢量差异的入侵编码
    • WO2012172113A1
    • 2012-12-20
    • PCT/EP2012/061613
    • 2012-06-18
    • FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.GEORGE, ValeriBROSS, BenjaminKIRCHHOFFER, HeinerMARPE, DetlevNGUYEN, TungPREISS, MatthiasSIEKMANN, MischaSTEGEMANN, JanWIEGAND, Thomas
    • GEORGE, ValeriBROSS, BenjaminKIRCHHOFFER, HeinerMARPE, DetlevNGUYEN, TungPREISS, MatthiasSIEKMANN, MischaSTEGEMANN, JanWIEGAND, Thomas
    • H04N7/26H04N7/50H03M7/42
    • H04N19/13H03M7/42H04N19/124H04N19/132H04N19/174H04N19/184H04N19/50H04N19/513H04N19/52H04N19/61H04N19/70H04N19/91
    • A decoder for decoding a video from a data stream into which horizontal and vertical components of motion vector differences are coded using binarizations of the horizontal and vertical components is described, the binarizations equaling a truncated unary code of the horizontal and vertical components, respectively, within a first interval of the domain of the horizontal and vertical components below a cutoff value, and a combination of a prefix in form of the truncated unary code for the cutoff value and a suffix in form of a Exp-Golomb code of the horizontal and vertical components, respectively, within a second interval of the domain of the horizontal and vertical components inclusive and above the cutoff value, wherein the cutoff value is two and the Exp-Golomb code has order one. An entropy decoder is configured to, for the horizontal and vertical components of the motion vector differences, derive the truncated unary code from the data stream using context- adaptive binary entropy decoding with exactly one context per bin position of the truncated unary code, which is common for the horizontal and vertical components of the motion vector differences, and the Exp-Golomb code using a constant equi-probability bypass mode to obtain the binarizations of the motion vector differences. A desymbolizer is configured to debinarize the binarizations of the motion vector difference syntax elements to obtain integer values of the horizontal and vertical components of the motion vector differences; A reconstructor is configured to reconstruct the video based on the integer values of the horizontal and vertical components of the motion vector differences.
    • 描述了一种解码器,用于对来自数据流的视频进行解码,使用水平和垂直分量的二值化对运动矢量差的水平和垂直分量进行编码,二进制化分别等于水平和垂直分量的截断的一元代码 水平和垂直分量的域的第一间隔低于截止值,以及用于截止值的截断的一元代码的形式的前缀的组合以及水平和垂直方向的Exp-Golomb码形式的后缀 分别在水平和垂直分量的领域的第二区间内,包括和高于截止值,其中截止值为2,而Exp-Golomb码具有1级。 熵解码器被配置为,对于运动矢量差的水平和垂直分量,使用上下文自适应二进制熵解码从数据流导出截断的一元代码,其中精确地一个上下文每个截断的一元代码的每个仓位,其是 对于运动矢量差的水平和垂直分量是公共的,并且使用恒定等概率旁路模式的Exp-Golomb码来获得运动矢量差异的二值化。 配音器被配置为对运动矢量差分语法元素的二值化进行二值化,以获得运动矢量差的水平和垂直分量的整数值; 重构器被配置为基于运动矢量差的水平和垂直分量的整数值来重建视频。