公开(公告)号：US20130343470A1

公开(公告)日：2013-12-26

申请号：US14002921

申请日：2012-03-07

申请人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

发明人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

IPC分类号： H04N7/26 ,  G06T5/00

CPC分类号： H04N19/82 ,  G06T5/002 ,  G06T5/20 ,  H04N5/142 ,  H04N5/21 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/80

摘要： The computational complexity of a denoising filter is reduced while suppressing a reduction in coding efficiency. In an image processing apparatus, an edge direction detection unit calculates an edge direction using a denoising target image. A search shape setting unit sets a search shape in which the number of search points along the direction perpendicular to the edge direction is smaller than the number of search points along the edge direction, using the calculated edge direction as an index used for limiting the search shape. When noise of a target pixel is removed with a weight in accordance with the degree of template similarity between a template for the target pixel and a template for each of search points within a search shape and the weighted sum of pixel values at the search points, a filter execution unit executes a process of performing template matching on only search points within the set search shape and removing the noise of the target pixel.

摘要翻译： 降低去噪滤波器的计算复杂度，同时抑制编码效率的降低。 在图像处理装置中，边缘方向检测单元使用去噪目标图像来计算边缘方向。 搜索形状设置单元使用所计算的边缘方向作为用于限制搜索的索引来设置沿着与边缘方向垂直的方向上的搜索点的数量小于沿着边缘方向的搜索点的数量的搜索形状 形状。 当根据目标像素的模板与搜索形状中的每个搜索点的模板和搜索点处的像素值的加权和之间的模板相似度的重叠度来去除目标像素的噪声时， 滤波器执行单元执行仅对所设置的搜索形状内的搜索点执行模板匹配的处理，并且去除目标像素的噪声。

公开(公告)号：US09438912B2

公开(公告)日：2016-09-06

申请号：US14000624

申请日：2012-03-07

申请人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

发明人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

IPC分类号： H04N19/117 ,  H04N19/14 ,  H04N19/82 ,  G06T5/20 ,  H04N19/176

CPC分类号： H04N19/82 ,  G06T5/20 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176

摘要： The computational complexity of a denoising filter is reduced while suppressing a reduction in coding efficiency. In a video encoding/decoding apparatus which uses a loop filter, a deviation degree calculating unit calculates the degree of deviation between a denoising target pixel and a surrounding pixel using a decoded image. A template shape setting unit limits a template shape so that its size is proportional to the degree of deviation relative to the maximum value of the degree of deviation in the decoded image. When noise of the target pixel is removed, weighted in accordance with the degree of similarity between a template of the target pixel and a template of each of search points in a search shape and the weighted sum of pixel values at the search points, the loop filter performs template matching using the limited template shape and removes noise of the target pixel.

摘要翻译： 降低去噪滤波器的计算复杂度，同时抑制编码效率的降低。 在使用环路滤波器的视频编码/解码装置中，偏差度计算单元使用解码图像来计算去噪对象像素和周围像素之间的偏离度。 模板形状设置单元限制模板形状，使得其尺寸与相对于解码图像中的偏离度的最大值的偏差度成比例。 当去除目标像素的噪声时，根据目标像素的模板与搜索形状中的每个搜索点的模板与搜索点处的像素值的加权和之间的相似度加权，循​​环 滤镜使用有限的模板形状执行模板匹配，并消除目标像素的噪点。

公开(公告)号：US20130336393A1

公开(公告)日：2013-12-19

申请号：US14000624

申请日：2012-03-07

申请人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

发明人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

IPC分类号： H04N7/26

CPC分类号： H04N19/82 ,  G06T5/20 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176

摘要： The computational complexity of a denoising filter is reduced while suppressing a reduction in coding efficiency. In a video encoding/decoding apparatus which uses a loop filter, a deviation degree calculating unit calculates the degree of deviation between a denoising target pixel and a surrounding pixel using a decoded image. A template shape setting unit limits a template shape so that its size is proportional to the degree of deviation relative to the maximum value of the degree of deviation in the decoded image. When noise of the target pixel is removed, weighted in accordance with the degree of similarity between a template of the target pixel and a template of each of search points in a search shape and the weighted sum of pixel values at the search points, the loop filter performs template matching using the limited template shape and removes noise of the target pixel.

摘要翻译： 降低去噪滤波器的计算复杂度，同时抑制编码效率的降低。 在使用环路滤波器的视频编码/解码装置中，偏差度计算单元使用解码图像来计算去噪对象像素和周围像素之间的偏离度。 模板形状设置单元限制模板形状，使得其尺寸与相对于解码图像中的偏离度的最大值的偏差度成比例。 当去除目标像素的噪声时，根据目标像素的模板与搜索形状中的每个搜索点的模板与搜索点处的像素值的加权和之间的相似度加权，循​​环 滤镜使用有限的模板形状执行模板匹配，并消除目标像素的噪点。

公开(公告)号：US09363515B2

公开(公告)日：2016-06-07

申请号：US14002921

申请日：2012-03-07

申请人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

发明人： Masaaki Matsumura ,  Seishi Takamura ,  Atsushi Shimizu ,  Hirohisa Jozawa

IPC分类号： H04N7/12 ,  H04N19/82 ,  H04N5/14 ,  H04N5/21 ,  G06T5/00 ,  G06T5/20 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/80

CPC分类号： H04N19/82 ,  G06T5/002 ,  G06T5/20 ,  H04N5/142 ,  H04N5/21 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/80

摘要： In an image processing apparatus, an edge direction detection unit calculates an edge direction using a denoising target image. A search shape setting unit sets a search shape in which the number of search points along the direction perpendicular to the edge direction is smaller than the number of search points along the edge direction, using the calculated edge direction as an index used for limiting the search shape. When noise of a target pixel is removed with a weight in accordance with the degree of template similarity between a template for the target pixel and a template for each of search points within a search shape and the weighted sum of pixel values at the search points, a filter execution unit executes a process of performing template matching on only search points within the set search shape and removing the noise of the target pixel.

摘要翻译： 在图像处理装置中，边缘方向检测单元使用去噪目标图像来计算边缘方向。 搜索形状设置单元使用所计算的边缘方向作为用于限制搜索的索引来设置沿着与边缘方向垂直的方向上的搜索点的数量小于沿着边缘方向的搜索点的数量的搜索形状 形状。 当根据目标像素的模板与搜索形状中的每个搜索点的模板和搜索点处的像素值的加权和之间的模板相似度的重叠度来去除目标像素的噪声时， 滤波器执行单元执行仅对所设置的搜索形状内的搜索点执行模板匹配的处理，并且去除目标像素的噪声。

公开(公告)号：US07206346B2

公开(公告)日：2007-04-17

申请号：US10354663

申请日：2003-01-30

申请人： Atsushi Shimizu ,  Hirohisa Jozawa ,  Kazuto Kamikura ,  Hiroshi Watanabe ,  Atsushi Sagata ,  Seishi Takamura

发明人： Atsushi Shimizu ,  Hirohisa Jozawa ,  Kazuto Kamikura ,  Hiroshi Watanabe ,  Atsushi Sagata ,  Seishi Takamura

IPC分类号： H04N7/12 ,  H04B1/66

CPC分类号： H04N19/51 ,  H04N19/517 ,  H04N19/52 ,  H04N19/527 ,  H04N19/537

摘要： A motion vector predictive encoding method, a motion vector decoding method, a predictive encoding apparatus, a decoding apparatuses, and storage media storing motion vector predictive encoding and decoding programs are provided, thereby reducing the amount of generated code with respect to the motion vector, and improving the efficiency of the motion-vector prediction. If the motion-compensating mode of the target small block to be encoded is the global motion compensation, the encoding mode of an already-encoded small block is the interframe coding mode, and the motion-compensating mode of the already-encoded small block is the global motion compensation, then the motion vector of the translational motion model is determined for each pixel of the already-encoded small block, based on the global motion vector (steps S1–S5). Next, the representative motion vector is calculated as the predicted vector, based on the motion vector of each pixel of the already-encoded small block (step S6). Finally, the prediction error is calculated for each component of the motion vector and each prediction error is encoded (steps S7 and S8).

摘要翻译： 提供了运动矢量预测编码方法，运动矢量解码方法，预测编码装置，解码装置和存储运动矢量预测编码和解码程序的存储介质，从而减少了相对于运动矢量产生的代码量， 并提高运动矢量预测的效率。 如果要编码的目标小块的运动补偿模式是全局运动补偿，则已经编码的小块的编码模式是帧间编码模式，并且已经编码的小块的运动补偿模式是 全局运动补偿，则基于全局运动矢量（步骤S1至S5），为已经编码的小块的每个像素确定平移运动模型的运动矢量。 接下来，基于已经编码的小块的每个像素的运动矢量，计算代表运动矢量作为预测矢量（步骤S6）。 最后，针对运动矢量的每个分量计算预测误差，对每个预测误差进行编码（步骤S 7和S 8）。

公开(公告)号：US20070183505A1

公开(公告)日：2007-08-09

申请号：US11726971

申请日：2007-03-22

申请人： Atsushi Shimizu ,  Hirohisa Jozawa ,  Kazuto Kamikura ,  Hiroshi Watanabe ,  Atsushi Sagata ,  Seishi Takamura

发明人： Atsushi Shimizu ,  Hirohisa Jozawa ,  Kazuto Kamikura ,  Hiroshi Watanabe ,  Atsushi Sagata ,  Seishi Takamura

IPC分类号： H04N11/02 ,  H04B1/66

CPC分类号： H04N19/51 ,  H04N19/517 ,  H04N19/52 ,  H04N19/527 ,  H04N19/537

摘要： A motion vector predictive encoding method, a motion vector decoding method, a predictive encoding apparatus, a decoding apparatuses, and storage media storing motion vector predictive encoding and decoding programs are provided, thereby reducing the amount of generated code with respect to the motion vector, and improving the efficiency of the motion-vector prediction. If the motion-compensating mode of the target small block to be encoded is the global motion compensation, the encoding mode of an already-encoded small block is the interframe coding mode, and the motion-compensating mode of the already-encoded small block is the global motion compensation, then the motion vector of the translational motion model is determined for each pixel of the already-encoded small block, based on the global motion vector (steps S1-S5). Next, the representative motion vector is calculated as the predicted vector, based on the motion vector of each pixel of the already-encoded small block (step S6). Finally, the prediction error is calculated for each component of the motion vector and each prediction error is encoded (steps S7 and S8).

公开(公告)号：US20140112391A1

公开(公告)日：2014-04-24

申请号：US14123054

申请日：2012-06-22

申请人： Shohei Matsuo ,  Yukihiro Bandoh ,  Seishi Takamura ,  Hirohisa Jozawa

发明人： Shohei Matsuo ,  Yukihiro Bandoh ,  Seishi Takamura ,  Hirohisa Jozawa

IPC分类号： H04N19/587 ,  H04N19/51

CPC分类号： H04N19/182 ,  H04N19/117 ,  H04N19/139 ,  H04N19/172 ,  H04N19/523 ,  H04N19/82

摘要： The prediction error energy in inter-frame prediction with motion compensation is reduced and the coding efficiency is improved. A video encoding method using fractional-accuracy motion compensation includes: a step of performing a motion search to acquire a motion vector; a step of calculating reference probabilities at fractional-pixel positions designated by the acquired motion vector; a step of dividing interpolation positions which are fractional-pixel positions into multiple groups based on the calculated reference probabilities; a step of selecting, for each of the groups of the interpolation positions, interpolation filter coefficients to be used for generating an interpolated prediction picture from among multiple interpolation filter coefficient candidates; a step of generating the interpolated prediction picture using the selected interpolation filter coefficients and performing encoding with the fractional-accuracy motion compensation based on the interpolated prediction picture, for each of the groups of the interpolation positions; and a step of encoding information indicating grouping of the interpolation positions and information indicating interpolation filter coefficients to be used for each of the groups of the interpolation positions.

摘要翻译： 运动补偿的帧间预测中的预测误差能量降低，编码效率提高。 使用分数精度运动补偿的视频编码方法包括：执行运动搜索以获取运动矢量的步骤; 计算由所获取的运动矢量指定的分数像素位置处的参考概率的步骤; 基于所计算的参考概率将作为分数像素位置的插值位置分割成多个组的步骤; 对于每个所述插补位置组，从多个内插滤波器系数候选中选择用于生成内插预测图像的内插滤波器系数的步骤; 使用所选择的内插滤波器系数生成内插预测图像并基于内插预测图像对于每个插值位置的每一组执行基于分数精度运动补偿的编码的步骤; 以及编码指示内插位置分组的信息的步骤，以及指示要用于插值位置的组中的每一组的内插滤波器系数的信息的步骤。

公开(公告)号：US20140105308A1

公开(公告)日：2014-04-17

申请号：US14125463

申请日：2012-06-22

申请人： Shohei Matsuo ,  Yukihiro Bandoh ,  Seishi Takamura ,  Hirohisa Jozawa

发明人： Shohei Matsuo ,  Yukihiro Bandoh ,  Seishi Takamura ,  Hirohisa Jozawa

IPC分类号： H04N19/593

CPC分类号： H04N19/593 ,  H04N19/61 ,  H04N19/82

摘要： The prediction error energy in inter-frame prediction with motion compensation is reduced and the coding efficiency is improved. A video encoding method using fractional-accuracy motion compensation includes: a step of generating multiple weighted filter coefficients from multiple interpolation filter sets using weight parameters which designate weight values of interpolation filter coefficients; a step of selecting weighted filter coefficients which minimize prediction error energy in the fractional-accuracy motion compensation from among the weighted filter coefficients; a step of interpolating fractional-accuracy pixels for a reference picture by application of an interpolation filter with the selected weighted filter coefficients and encoding an input picture with the fractional-accuracy motion compensation; and a step of encoding the weight parameters used for generating the selected weighted filter coefficients and the interpolation filter coefficients and adding encoded weight parameters and encoded interpolation filter coefficients to an encoded bitstream.

摘要翻译： 运动补偿的帧间预测中的预测误差能量降低，编码效率提高。 使用分数精度运动补偿的视频编码方法包括：使用表示内插滤波器系数的权重值的权重参数从多个内插滤波器组生成多个加权滤波器系数的步骤; 从所述加权滤波器系数中选择使所述分数精度运动补偿中的预测误差能量最小化的加权滤波器系数的步骤; 通过使用具有所选择的加权滤波器系数的内插滤波器对参考图像内插分数精度像素并对具有分数精度运动补偿的输入图像进行编码的步骤; 以及编码用于生成所选择的加权滤波器系数和内插滤波器系数的加权参数并将编码的加权参数和编码的内插滤波器系数加到经编码比特流的步骤。

公开(公告)号：US09693053B2

公开(公告)日：2017-06-27

申请号：US14124331

申请日：2012-06-26

申请人： Yukihiro Bandoh ,  Shohei Matsuo ,  Seishi Takamura ,  Hirohisa Jozawa

发明人： Yukihiro Bandoh ,  Shohei Matsuo ,  Seishi Takamura ,  Hirohisa Jozawa

IPC分类号： H04N19/503 ,  H04N19/105 ,  H04N19/51 ,  H04N19/52 ,  H04N19/463 ,  H04N19/91

CPC分类号： H04N19/52 ,  H04N19/463 ,  H04N19/91

摘要： A video encoding device uses motion-compensated inter-frame prediction by dividing an image into blocks, each block a predetermined size, designating a first component value of a plurality of component values of a motion vector (MV) between an encoding target block and a neighboring block, designating a second component value, and encoding each first and second component values; a first component encoding means encodes a difference value of a first component and a second component encoding means, which obtains a probability of occurrence of a candidate value for the second component value of the MV of the encoding target block, based on a difference value between the first component value of the neighboring block MV and the first component value of the encoding target block MV and the second component value of the neighboring block MV, specifies a codeword of the second component value, encoding it based on the occurrence probability.

公开(公告)号：US09667963B2

公开(公告)日：2017-05-30

申请号：US14125463

申请日：2012-06-22

申请人： Shohei Matsuo ,  Yukihiro Bandoh ,  Seishi Takamura ,  Hirohisa Jozawa

发明人： Shohei Matsuo ,  Yukihiro Bandoh ,  Seishi Takamura ,  Hirohisa Jozawa

IPC分类号： H04N7/12 ,  H04N19/593 ,  H04N19/82 ,  H04N19/61

CPC分类号： H04N19/593 ,  H04N19/61 ,  H04N19/82

摘要： The prediction error energy in inter-frame prediction with motion compensation is reduced and the coding efficiency is improved. A video encoding method using fractional-accuracy motion compensation includes: a step of generating multiple weighted filter coefficients from multiple interpolation filter sets using weight parameters which designate weight values of interpolation filter coefficients; a step of selecting weighted filter coefficients which minimize prediction error energy in the fractional-accuracy motion compensation from among the weighted filter coefficients; a step of interpolating fractional-accuracy pixels for a reference picture by application of an interpolation filter with the selected weighted filter coefficients and encoding an input picture with the fractional-accuracy motion compensation; and a step of encoding the weight parameters used for generating the selected weighted filter coefficients and the interpolation filter coefficients and adding encoded weight parameters and encoded interpolation filter coefficients to an encoded bitstream.