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481 条记录 (耗时 0.051 秒)

    Intra-picture prediction coding method
    52.
    发明授权
    Intra-picture prediction coding method 有权
    图像内预测编码方法

    公开(公告)号：US07369707B2

    公开(公告)日：2008-05-06

    申请号：US10974682

    申请日：2004-10-28

    申请人： Satoshi Sakaguchi ,  Shinya Kadono

    发明人： Satoshi Sakaguchi ,  Shinya Kadono

    IPC分类号： G06K9/36

    CPC分类号： H04N19/156 ,  H04N19/11 ,  H04N19/146 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70

    摘要： The intra-picture prediction coding apparatus 150a is comprised of: an intra-picture prediction mode candidate determination unit 156a that determines intra-picture prediction mode candidates by switching among intra-picture prediction mode candidate determination methods based on an amount of resources 172; an intra-picture prediction execution unit 151 that sequentially performs intra-picture prediction on a current block using each of intra-picture prediction modes in the intra-picture prediction mode candidates and generates an intra-picture predictive image 164; a prediction difference calculation unit 152 that generates a prediction difference image 165 based on the intra-picture prediction image 164 and the image presented by the current block; a coding efficiency evaluation unit 153 that calculates an evaluation value 166 based on the prediction difference image 165; an intra-picture prediction mode determination unit 154 that determines the intra-picture prediction mode whose evaluation value 166 is the smallest among the intra-picture prediction mode candidates; and a coding unit 155 that codes a prediction difference image 168 as a result of the prediction using the determined intra-picture prediction mode as well as the intra-picture prediction mode information 167.

    摘要翻译： 图像内预测编码装置150a包括：图像内预测模式候选确定单元156a，其通过基于资源量172切换图像间预测模式候选确定方法来确定图像内预测模式候选 ; 图像内预测执行单元151，其使用帧内图像预测模式候补中的每个图像内预测模式，对当前块进行图像内预测，并生成图像内预测图像164; 基于图像内预测图像164生成预测差分图像165和由当前块呈现的图像的预测差分计算单元152; 基于预测差分图像165计算评价值166的编码效率评价部153; 图像内预测模式确定单元154，其确定图像内预测模式候选中评估值166最小的图像内预测模式; 以及编码单元155，其使用所确定的图像内预测模式以及图像内预测模式信息167对作为预测的结果的预测差异图像168进行编码。

    Motion vector coding and decoding methods
    55.
    发明申请
    Motion vector coding and decoding methods 有权
    运动矢量编码和解码方法

    公开(公告)号：US20080069237A1

    公开(公告)日：2008-03-20

    申请号：US11980661

    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： H04N7/32

    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.

    摘要翻译： 一种使用多个运动矢量对当前块进行编码时提高编码运动矢量效率的运动矢量编码方法和装置。 该装置包括对从运动矢量检测单元输入的运动矢量进行编码的运动矢量编码单元。 基于运动矢量与从先前编码的相邻块的运动矢量获得的预测矢量之间的差来对每个当前块的运动矢量进行编码。 通过以下处理之一生成预测矢量：（A）从相邻块的运动矢量中选择参照相同图像的运动矢量，以生成预测矢量; （B）各个相邻块的运动矢量以预定顺序排列，从有序运动矢量中选择相同次序秩的运动矢量，以产生预测矢量; 和（C）当前块的第二运动矢量的预测矢量应为第一运动矢量，如果第二运动矢量和第一运动矢量指的是不同的图像，则第一运动矢量根据时间距离 在图像之间产生预测矢量。

    Moving picture coding method and moving picture decoding method
    57.
    发明申请
    Moving picture coding method and moving picture decoding method 有权

    公开(公告)号：US20080069212A1

    公开(公告)日：2008-03-20

    申请号：US11976826

    申请日：2007-10-29

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

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

    IPC分类号： H04N7/12 ,  H04Q7/20

    CPC分类号： H04N19/00024 ,  H04N19/105 ,  H04N19/114 ,  H04N19/115 ,  H04N19/14 ,  H04N19/149 ,  H04N19/156 ,  H04N19/162 ,  H04N19/164 ,  H04N19/177 ,  H04N19/51 ,  H04N19/573 ,  H04N19/58 ,  H04N19/61

    摘要： A moving picture coding apparatus (10a) according to the present invention includes a level analyzer (100a) that decides the maximum number of intra frame pixels which can be coded (Nfpx) and the maximum number of storage pixels which can be stored in a picture memory of a decoding apparatus (Nspx) on the basis of a level identifier (Lst) indicating a coding level that is designated by the user, thereby judging whether coding of an input image is possible or not and calculating the maximum number of reference pictures (Nrpn) as the number of reference candidate pictures which can be referred to at inter picture prediction coding, on the basis of the maximum number of intra frame pixels (Nfpx) and the input image size (the number of vertical pixels (Nhpx) and the number of horizontal pixels (Nwpx)). A decoding apparatus to which a bit stream from the moving picture coding apparatus (10a) is supplied can always decode the bit stream satisfactorily, and perform inter picture prediction decoding corresponding to the inter picture prediction coding on the coding end. Consequently, memory areas of a coding apparatus and a decoding apparatus that are adapted to a coding method in which there is no restraint on the capacity of the memory area can be designed.