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    Image coding apparatus and its motion vector detection method
    1.
    发明授权
    Image coding apparatus and its motion vector detection method 有权
    图像编码装置及其运动矢量检测方法

    公开(公告)号：US06470050B1

    公开(公告)日：2002-10-22

    申请号：US09544546

    申请日：2000-04-06

    申请人： Akihiko Ohtani ,  Takaaki Shingo

    发明人： Akihiko Ohtani ,  Takaaki Shingo

    IPC分类号： H04N736

    CPC分类号： H04N19/433 ,  H04N19/51

    摘要： The present invention provides an image coding apparatus and its motion vector detection method, which can reduce a system cost also when the throughput of image data is increased. The image coding apparatus of the present invention comprises a search range frame memory 40 for outputting a search range for motion vector detection, a coding target frame memory 50 for outputting a coding target block, and a motion compensation unit 210 for performing motion compensation by using the coding target block which is input from the coding target frame memory 50 via a second data bus and the search range for the motion vector detection, which is input from the search range frame memory 40 via a first data bus, and obtaining a candidate block having a highest correlation with the coding target block in the search range.

    摘要翻译： 本发明提供了一种图像编码装置及其运动矢量检测方法，当图像数据的吞吐量增加时也可以降低系统成本。 本发明的图像编码装置包括：搜索范围帧存储器40，用于输出用于运动矢量检测的搜索范围，用于输出编码目标块的编码目标帧存储器50;以及运动补偿单元210，用于通过使用 经由第二数据总线从编码目标帧存储器50输入的编码目标块和经由第一数据总线从搜索范围帧存储器40输入的用于运动矢量检测的搜索范围，以及获得候选块 与搜索范围中的编码目标块具有最高的相关性。

    Motion vector detection device and motion vector detection method
    3.
    发明授权
    Motion vector detection device and motion vector detection method 有权
    运动矢量检测装置和运动矢量检测方法

    公开(公告)号：US06671321B1

    公开(公告)日：2003-12-30

    申请号：US09653483

    申请日：2000-08-31

    申请人： Akihiko Ohtani ,  Takaaki Shingo

    发明人： Akihiko Ohtani ,  Takaaki Shingo

    IPC分类号： H04B166

    CPC分类号： H04N5/145 ,  G06T7/231 ,  G06T2207/10016 ,  H04N19/51 ,  H04N19/53 ,  H04N19/57

    摘要： A motion vector detection device of the present invention includes: a parameter setting section having parameters relating to N (N is a natural number equal to or greater than 2) search regions obtained by dividing at least a portion of an entire search region in a search frame; a motion vector detection section for calculating an evaluation value which indicates a degree of correlation between an encoded object block in an object frame and a candidate block in one of the N search regions and for calculating a motion vector based on the evaluation value; a result storage section for storing the motion vector and the evaluation value calculated by the motion vector detection section; and a control section for controlling the motion vector detection section to calculate motion vectors and evaluation values for M (1≦M≦N) different ones of the N search regions until a predetermined condition is satisfied, for receiving the motion vectors and the evaluation values from the result storage section, and for determining the motion vector for the encoded object block.

    摘要翻译： 本发明的运动矢量检测装置包括：具有与N（N是2以上的自然数）相关的参数的参数设定部，通过在搜索中划分整个搜索区域的至少一部分而获得的搜索区域 帧; 运动矢量检测部分，用于计算指示目标帧中的编码对象块与N个搜索区域之一中的候选块之间的相关度的评估值，并且用于基于评估值计算运动矢量; 结果存储部分，用于存储由运动矢量检测部分计算出的运动矢量和评估值; 以及控制部分，用于控制运动矢量检测部分，以计算用于接收运动矢量的M个（1 <= M <= N）个不同的N个搜索区域的运动矢量和评估值，直到满足预定条件， 来自结果存储部分的评估值，以及用于确定编码对象块的运动矢量。

    Apparatus and method of detecting motion vectors by calculating a correlation degree between each candidate block
    4.
    发明授权
    Apparatus and method of detecting motion vectors by calculating a correlation degree between each candidate block 失效
    通过计算每个候选块之间的相关度来检测运动矢量的装置和方法

    公开(公告)号：US06611559B1

    公开(公告)日：2003-08-26

    申请号：US08934137

    申请日：1997-09-19

    申请人： Takaaki Shingo ,  Akihiko Otani

    发明人： Takaaki Shingo ,  Akihiko Otani

    IPC分类号： H04N712

    CPC分类号： H04N5/145 ,  H04N19/43 ,  H04N19/51 ,  H04N19/517 ,  H04N19/567

    摘要： In order to realize a picture compression processing with a higher efficiency than ever in motion vector detection for motion picture compression coding, an improvement is provided to motion vector selection process when a plurality of candidate blocks having evaluation values of the same correlation degree have been detected from a search area. When there are a plurality of candidate blocks within the search area which have the highest correlation degree with the coding block, a difference is calculated between each of a plurality of motion vectors corresponding to the plurality of candidate blocks, respectively, and the best motion vector which is variable-coded immediately before the best motion vector which is being determined. Based on the calculated difference, the best motion vector is selected from among the plurality of motion vectors. Consequently, when the variable coding of a motion vector string is conducted by variable-coding the difference between two consecutive motion vectors, a motion vector is selected so that the code length of the motion vector string which has been variable-coded becomes short. As a result, an efficient picture compression processing can be realized.

    摘要翻译： 为了在动态图像压缩编码的运动矢量检测中实现比以往更高的效率的图像压缩处理，当已经检测到具有相同相关度的评估值的多个候选块已经被检测到时，提供了对运动矢量选择处理的改进 从搜索区域。 当在搜索区域内存在与编码块具有最高相关程度的多个候选块时，分别在与多个候选块相对应的多个运动矢量中的每一个之间计算差分，并且最佳运动矢量 其在正在确定的最佳运动矢量之前被可变编码。 基于计算的差，从多个运动矢量中选择最佳运动矢量。 因此，当通过对两个连续运动矢量之间的差进行可变编码来进行运动矢量串的可变编码时，选择运动矢量，使得可变编码的运动矢量串的码长变短。 结果，可以实现有效的图像压缩处理。