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    Motion vector coding and decoding methods
    7.
    发明授权
    Motion vector coding and decoding methods 有权

    公开(公告)号：US08213510B2

    公开(公告)日：2012-07-03

    申请号：US11980622

    申请日：2007-10-31

    申请人： Satoshi Kondo ,  Shinya Kadono ,  Makoto Hagai ,  Kiyofumi Abe

    发明人： Satoshi Kondo ,  Shinya Kadono ,  Makoto Hagai ,  Kiyofumi Abe

    IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04B1/66

    CPC分类号： H04N19/61 ,  H04N19/176 ,  H04N19/51 ,  H04N19/513 ,  H04N19/517 ,  H04N19/52 ,  H04N19/573

    摘要： A motion vector coding method and apparatus that improves efficiency of coding motion vectors when a current block is coded using a plurality of motion vectors. The apparatus includes a motion vector coding unit that codes a motion vector inputted from a motion vector detecting unit. A motion vector for each current block is coded based on a difference between the motion vector and a predicted vector obtained from motion vectors for previously coded neighboring blocks. The predicted vector is generated by one of the following processes: (A) the motion vectors which refer to the same picture are selected from among the motion vectors for the neighboring blocks so as to generate the predicted vector; (B) the motion vectors for the respective neighboring blocks are ordered in the predetermined order, and the motion vectors of the same order rank are selected from the ordered motion vectors so as to generate the predicted vector; and (C) the predicted vector for the second motion vector of the current block shall be the first motion vector, and if the second motion vector and the first motion vector refer to different pictures, the first motion vector is scaled according to the temporal distance between the pictures so as to generate the predicted vector.

    Moving picture coding method and moving picture decoding method
    9.
    发明授权
    Moving picture coding method and moving picture decoding method 有权
    运动图像编码方法和运动图像解码方法

    公开(公告)号：US08023753B2

    公开(公告)日：2011-09-20

    申请号：US12878350

    申请日：2010-09-09

    申请人： Kiyofumi Abe ,  Shinya Kadono ,  Satoshi Kondo ,  Makoto Hagai

    发明人： Kiyofumi Abe ,  Shinya Kadono ,  Satoshi Kondo ,  Makoto Hagai

    IPC分类号： G06T9/00 ,  H04N7/32 ,  H04N7/64

    CPC分类号： H04N19/105 ,  H04N19/103 ,  H04N19/117 ,  H04N19/134 ,  H04N19/137 ,  H04N19/139 ,  H04N19/147 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/177 ,  H04N19/18 ,  H04N19/182 ,  H04N19/42 ,  H04N19/46 ,  H04N19/573 ,  H04N19/577 ,  H04N19/58 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70

    摘要： According to a picture coding method of the present invention, a coded picture identified by a picture number is stored, as a reference picture, into a storage unit; commands indicating correspondence between picture numbers and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted. At that time, information indicating the maximum reference index value is coded and included into the coded image signal, and the commands indicating correspondence between at least one picture number and a plurality of reference indices are generated.

    摘要翻译： 根据本发明的图像编码方法，将由图像号码识别的编码图像作为参考图像存储到存储单元中; 生成用于指定用于生成预测图像的参考图像和系数的图像编号和参考索引之间的对应关系的命令; 通过参考索引来指定对当前要编码的图像中的当前块执行运动补偿时使用的参考图像; 通过使用与参考索引相对应的系数对通过指定参考图片内的运动估计获得的块执行线性预测来生成预测图像; 输出编码图像信号，该编码图像信号包括通过编码作为当前编码图像中的当前块与预测图像之间的差的预测误差获得的编码信号，命令，参考索引和系数。 此时，指示最大参考指标值的信息被编码并包括在编码图像信号中，并且生成指示至少一个图像编号和多个参考索引之间的对应关系的命令。