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    Motion vector coding and decoding methods
    71.
    发明申请
    Motion vector coding and decoding methods 有权

    公开(公告)号：US20080260035A1

    公开(公告)日：2008-10-23

    申请号：US11980531

    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

    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
    75.
    发明申请
    Moving picture coding method and moving picture decoding method 有权

    公开(公告)号：US20080063087A1

    公开(公告)日：2008-03-13

    申请号：US11976847

    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： H04N7/24

    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.

    Motion vector coding and decoding methods
    77.
    发明申请
    Motion vector coding and decoding methods 有权

    公开(公告)号：US20080063077A1

    公开(公告)日：2008-03-13

    申请号：US11980550

    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： H04B1/66 ,  H04N11/02 ,  H04N11/04 ,  H04N7/12

    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.

    Picture coding method and picture decoding method
    79.
    发明授权
    Picture coding method and picture decoding method 有权
    图像编码方法和图像解码方法

    公开(公告)号：US07221803B2

    公开(公告)日：2007-05-22

    申请号：US11586618

    申请日：2006-10-26

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

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

    IPC分类号： G06K9/36

    CPC分类号： H04N19/127 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/423 ,  H04N19/46 ,  H04N19/573 ,  H04N19/58 ,  H04N19/61 ,  H04N19/70 ,  H04N19/89

    摘要： An image coding method and an image decoding method is provided by which an image can be restored correctly even if part of memory management information is lost by a transmission channel error, a candidate of a reference image that can be referred to is selected more appropriately, and coding efficiency is improved. The image coding method includes a step for executing coding of an image, a step for judging whether a picture in the memory which is never used as reference exists, a step for coding memory management information for releasing the picture in the memory which is never used as reference when a picture in the memory which is never used as reference exists, a step for releasing the picture in the memory which is never used as reference, a step for judging whether the memory management information that releases the picture in the memory which is never used as reference is coded by coding of an image immediately before, and a step for coding again the memory management information that releases the picture in the memory which is never used as reference when the memory management information is coded.

    摘要翻译： 提供一种图像编码方法和图像解码方法，通过该图像编码方法和图像解码方法，即使存储器管理信息的一部分由于传输信道错误而丢失，也可以正确地恢复图像，可以更适当地选择可参考的参考图像的候选， 编码效率提高。 该图像编码方法包括执行图像编码的步骤，用于判断存储器中未被使用的图像是否存在的步骤，用于编码用于释放未被使用的存储器中的图像的存储器管理信息的步骤 作为参考，当存在从未用作参考的存储器中的图像时，存在用于释放从未用作参考的存储器中的图像的步骤，用于判断在存储器中释放图像的存储器管理信息是否为 从不用作参考的是通过对紧接在前的图像的编码进行编码的步骤，以及用于再次编码在存储器管理信息被编码时从未用作参考的存储器中释放图像的存储器管理信息的步骤。

    Picture coding method and picture decoding method
    80.
    发明授权
    Picture coding method and picture decoding method 有权

    公开(公告)号：US07218787B2

    公开(公告)日：2007-05-15

    申请号：US11586619

    申请日：2006-10-26

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

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

    IPC分类号： G06K9/36

    CPC分类号： H04N19/127 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/423 ,  H04N19/46 ,  H04N19/573 ,  H04N19/58 ,  H04N19/61 ,  H04N19/70 ,  H04N19/89

    摘要： An image coding method and an image decoding method is provided by which an image can be restored correctly even if part of memory management information is lost by a transmission channel error, a candidate of a reference image that can be referred to is selected more appropriately, and coding efficiency is improved. The image coding method includes a step for executing coding of an image, a step for judging whether a picture in the memory which is never used as reference exists, a step for coding memory management information for releasing the picture in the memory which is never used as reference when a picture in the memory which is never used as reference exists, a step for releasing the picture in the memory which is never used as reference, a step for judging whether the memory management information that releases the picture in the memory which is never used as reference is coded by coding of an image immediately before, and a step for coding again the memory management information that releases the picture in the memory which is never used as reference when the memory management information is coded.