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    • 41. 发明授权
    • Apparatus and method for determining 4X4 intra luminance prediction mode
    • 用于确定4X4内部亮度预测模式的装置和方法
    • US07450640B2
    • 2008-11-11
    • US10829301
    • 2004-04-22
    • So-young KimHyeong-seok HaNam-suk Lee
    • So-young KimHyeong-seok HaNam-suk Lee
    • H04N7/18
    • H04N19/11H04N19/105H04N19/15H04N19/176
    • A method and apparatus for determining a prediction mode used for video encoding/decoding are provided. The prediction mode determination method includes: (a) grouping a plurality of predetermined prediction modes into a predetermined number of groups; (b) selecting one prediction mode for each of the groups, respectively, performing predictions for a predetermined block in the selected prediction modes, and calculating prediction errors in the selected prediction modes; and (c) performing predictions for the predetermined block in other prediction modes belonging to a group including a prediction mode with a smallest prediction error among the calculated prediction errors, calculating prediction errors in the other prediction modes, and deciding a prediction mode according to the calculated prediction errors. Therefore, it is possible to select an optimal prediction mode through lower calculation times, thereby preventing an encoder from being complicated.
    • 提供了一种用于确定用于视频编码/解码的预测模式的方法和装置。 预测模式确定方法包括:(a)将多个预定预测模式分组成预定数量的组; (b)分别为每个组选择一个预测模式,对所选择的预测模式中的预定块进行预测,并计算所选择的预测模式中的预测误差; 以及(c)对属于包括所计算的预测误差中具有最小预测误差的预测模式的组的其他预测模式中的预定块执行预测,计算其它预测模式中的预测误差,并根据 计算预测误差。 因此,可以通过较少的计算时间来选择最佳预测模式,从而防止编码器复杂化。
    • 42. 发明申请
    • Method and apparatus for sub-pixel motion estimation which reduces bit precision
    • 用于子像素运动估计的方法和装置,其降低位精度
    • US20050276330A1
    • 2005-12-15
    • US11083986
    • 2005-03-21
    • Chan-sik ParkJae-hun LeeNam-suk Lee
    • Chan-sik ParkJae-hun LeeNam-suk Lee
    • H04N7/32H04N7/12H04N7/26H04N7/30
    • H04N19/523H04N19/184H04N19/51
    • A method and apparatus are provided for sub-pixel motion estimation which performs sub-pixel motion estimation in which the precision of a difference between a pixel value of a block to be searched and a pixel value of a block of a search area, i.e., the number of bits of the difference, is reduced. The method for sub-pixel motion estimation in inter-prediction includes (a) determining one integer pixel corresponding to an estimated block by performing integer-pixel motion estimation, (b) receiving a value of a sub-pixel that is adjacent to the determined integer pixel and a value of an integer pixel of a block to be searched, (c) reducing a difference between the value of the sub-pixel and the value of the integer pixel and reducing a bit precision of the difference, and (d) calculating a similarity using the difference whose bit precision is reduced.
    • 提供了一种用于子像素运动估计的方法和装置,其执行子像素运动估计,其中要搜索的块的像素值与搜索区域的块的像素值之间的差的精度,即, 差的位数减少。 帧间预测中的子像素运动估计方法包括:(a)通过执行整数像素运动估计来确定与估计块对应的一个整数像素,(b)接收与所确定的子像素相邻的子像素的值 整数像素和要搜索的块的整数像素的值,(c)减小子像素的值和整数像素的值之间的差并减小差的位精度,以及(d) 使用比特精度降低的差异来计算相似度。
    • 45. 发明授权
    • Method and apparatus for generating motion vector in hierarchical motion estimation
    • 用于在分层运动估计中产生运动矢量的方法和装置
    • US08130835B2
    • 2012-03-06
    • US11091954
    • 2005-03-29
    • Jae-hun LeeNam-suk Lee
    • Jae-hun LeeNam-suk Lee
    • H04N7/12H04N11/02
    • H04N19/53G06T7/207H04N19/56
    • A method and apparatus is provided for generating a middle level motion vector in hierarchical motion estimation. TA second-resolution-frame motion vector is generated in a second resolution frame having a second resolution from a first-resolution-frame motion vector in a first resolution frame having a first resolution, the second resolution being higher than the first resolution. A local-search reference point is determined in the second-resolution frame based on the first-resolution-frame motion vector, and the second-resolution-frame motion vector is generated by performing a local search process on the second resolution frame based on the determined local-search reference point. The local search process is performed based on matching reference values for lower estimation blocks, each of the lower estimation blocks comprise pixel values of some portions of a current estimation block and a past estimation block. The current estimation block is an estimation block of a current frame and the past estimation block is an estimation block of a corresponding past frame. Accordingly, an amount of operations for the matching reference values can be reduced.
    • 提供了一种用于在分层运动估计中产生中间级运动矢量的方法和装置。 在具有第一分辨率的第一分辨率帧中的第一分辨率帧运动矢量具有第二分辨率的第二分辨率帧中产生TA第二分辨率帧运动矢量,第二分辨率高于第一分辨率。 基于第一分辨率帧运动矢量在第二分辨率帧中确定局部搜索参考点,并且基于第二分辨率帧运动矢量对第二分辨率帧执行本地搜索处理来生成第二分辨率帧运动矢量 确定的本地搜索参考点。 基于对于较低估计块的匹配参考值执行本地搜索处理,每个较低估计块包括当前估计块的一些部分的像素值和过去的估计块。 当前估计块是当前帧的估计块,而过去的估计块是对应的过去帧的估计块。 因此,可以减少用于匹配参考值的操作量。