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    • 15. 发明申请
    • IMAGE CODING METHOD AND IMAGE DECODING METHOD
    • 图像编码方法和图像解码方法
    • US20100128995A1
    • 2010-05-27
    • US12529813
    • 2009-01-16
    • Virginie DrugeonThomas WediTorsten PalfnerHisao Sasai
    • Virginie DrugeonThomas WediTorsten PalfnerHisao Sasai
    • G06K9/36
    • H04N19/00733H04N19/11H04N19/14H04N19/176H04N19/51H04N19/593
    • Provided is an image coding method for performing intra prediction achieving higher coding efficiency. The method for coding image data on a block-by-block basis includes: generating a predicted block by predicting a current block; computing a difference between the current block and the predicted block; coding the difference computed in the computing; decoding the difference coded in the coding; and adding the difference decoded in the decoding to the predicted block to generate a decoded block, wherein the generating includes: detecting an edge in a previously decoded block corresponding to a block adjacent to the current block; and extrapolating or interpolating previously decoded image data corresponding to a pixel included in the block adjacent to the current block, along a direction of the edge detected in the detecting to generate the predicted block.
    • 提供一种用于执行实现更高编码效率的帧内预测的图像编码方法。 逐块地对图像数据进行编码的方法包括:通过预测当前块来生成预测块; 计算当前块和预测块之间的差; 编码计算中计算的差值; 对在编码中编码的差分进行解码; 并将解码中解码的差分加到所述预测块中以产生解码块,其中所述生成包括:检测对应于与所述当前块相邻的块的先前解码块中的边缘; 并且沿着在检测中检测到的边缘的方向外插或内插与包括在与当前块相邻的块中的像素对应的先前解码图像数据,以生成预测块。
    • 16. 发明授权
    • Image coding method and image decoding method based on edge direction
    • 基于边缘方向的图像编码方法和图像解码方法
    • US08442334B2
    • 2013-05-14
    • US12529813
    • 2009-01-16
    • Virginie DrugeonThomas WediTorsten PalfnerHisao Sasai
    • Virginie DrugeonThomas WediTorsten PalfnerHisao Sasai
    • G06K9/36
    • H04N19/00733H04N19/11H04N19/14H04N19/176H04N19/51H04N19/593
    • Provided is an image coding method for performing intra prediction achieving higher coding efficiency. The method for coding image data on a block-by-block basis includes: generating a predicted block by predicting a current block; computing a difference between the current block and the predicted block; coding the difference computed in the computing; decoding the difference coded in the coding; and adding the difference decoded in the decoding to the predicted block to generate a decoded block, wherein the generating includes: detecting an edge in a previously decoded block corresponding to a block adjacent to the current block; and extrapolating or interpolating previously decoded image data corresponding to a pixel included in the block adjacent to the current block, along a direction of the edge detected in the detecting to generate the predicted block.
    • 提供一种用于执行实现更高编码效率的帧内预测的图像编码方法。 逐块地对图像数据进行编码的方法包括:通过预测当前块来生成预测块; 计算当前块和预测块之间的差; 编码计算中计算的差值; 对在编码中编码的差分进行解码; 并将解码中解码的差分加到所述预测块中以产生解码块,其中所述生成包括:检测对应于与所述当前块相邻的块的先前解码块中的边缘; 并且沿着在检测中检测到的边缘的方向外插或内插与包括在与当前块相邻的块中的像素对应的先前解码图像数据,以生成预测块。
    • 17. 发明授权
    • Video encoding method, and video decoding method
    • 视频编码方法和视频解码方法
    • US08681872B2
    • 2014-03-25
    • US13429538
    • 2012-03-26
    • Hisao SasaiSatoshi Kondo
    • Hisao SasaiSatoshi Kondo
    • H04N11/04
    • H04N19/59H04N19/33H04N19/46H04N19/467H04N19/48H04N19/50H04N19/60H04N19/80
    • Provided is a video coding method and a video decoding method increasing the resolution and quality of images while suppressing an amount of data required for increasing the resolution. A video coding apparatus includes a first orthogonal transformation unit performing discrete cosine transform on an input picture signal, a low-pass filter performing low-pass filtering on the input picture signal, a downsampling unit downsampling the resolution of a low-frequency image signal, a coding unit compressing and coding a reduced image signal, a local decoding unit decoding a coded bit stream, a second orthogonal transformation unit performing discrete cosine transform on a decoded image signal, and a modification information generation unit generating, based on input image DCT coefficients and decoded image DCT coefficients, coefficient modification information used for modifying orthogonal transformation coefficients obtained by performing orthogonal transformation on a decoded video signal obtained from a coded bit stream.
    • 提供了一种在抑制提高分辨率所需的数据量的同时增加图像的分辨率和质量的视频编码方法和视频解码方法。 视频编码装置包括对输入图像信号进行离散余弦变换的第一正交变换单元,对输入图像信号进行低通滤波的低通滤波器,对低频图像信号的分辨率进行下采样的下采样单元, 压缩编码缩小图像信号的编码单元,对编码比特流进行解码的局部解码单元,对解码图像信号进行离散余弦变换的第二正交变换单元,以及修改信息生成单元,基于输入图像DCT系数 和解码图像DCT系数,用于修改通过对从编码比特流获得的解码视频信号执行正交变换而获得的正交变换系数的系数修改信息。
    • 18. 发明授权
    • Video encoding method, and video decoding method
    • 视频编码方法和视频解码方法
    • US08165212B2
    • 2012-04-24
    • US11667694
    • 2005-11-14
    • Hisao SasaiSatoshi Kondo
    • Hisao SasaiSatoshi Kondo
    • H04N11/02
    • H04N19/59H04N19/33H04N19/46H04N19/467H04N19/48H04N19/50H04N19/60H04N19/80
    • Provided is a video coding method and a video decoding method increasing the resolution and quality of images while suppressing an amount of data required for increasing the resolution. A video coding apparatus includes a first orthogonal transformation unit performing discrete cosine transform on an input picture signal, a low-pass filter performing low-pass filtering on the input picture signal, a downsampling unit downsampling the resolution of a low-frequency image signal, a coding unit compressing and coding a reduced image signal, a local decoding unit decoding a coded bit stream, a second orthogonal transformation unit performing discrete cosine transform on a decoded image signal, and a modification information generation unit generating, based on input image DCT coefficients and decoded image DCT coefficients, coefficient modification information used for modifying orthogonal transformation coefficients obtained by performing orthogonal transformation on a decoded video signal obtained from a coded bit stream.
    • 提供了一种在抑制提高分辨率所需的数据量的同时增加图像的分辨率和质量的视频编码方法和视频解码方法。 视频编码装置包括对输入图像信号进行离散余弦变换的第一正交变换单元,对输入图像信号进行低通滤波的低通滤波器,对低频图像信号的分辨率进行下采样的下采样单元, 压缩编码缩小图像信号的编码单元,对编码比特流进行解码的局部解码单元,对解码图像信号进行离散余弦变换的第二正交变换单元,以及修改信息生成单元,基于输入图像DCT系数 和解码图像DCT系数,用于修改通过对从编码比特流获得的解码视频信号执行正交变换而获得的正交变换系数的系数修改信息。
    • 19. 发明申请
    • Video Encoding Method, and Video Decoding Method
    • 视频编码方法和视频解码方法
    • US20080043835A1
    • 2008-02-21
    • US11667694
    • 2005-11-14
    • Hisao SasaiSatoshi Kondo
    • Hisao SasaiSatoshi Kondo
    • H04N7/12
    • H04N19/59H04N19/33H04N19/46H04N19/467H04N19/48H04N19/50H04N19/60H04N19/80
    • Provided is a video coding method and a video decoding method capable of increasing the resolution and quality of images while suppressing an amount of data required for increasing the resolution. A video coding apparatus (100) includes: a first orthogonal transformation unit (102) which performs discrete cosine transform on an input picture signal (101); a low-pass filter (116) which performs low-pass filtering on the input picture signal (101); a downsampling unit (108) which downsamples the resolution of a low-frequency image signal (117); a coding unit (110) which compresses and codes a reduced image signal (109); a local decoding unit (112) which decodes a coded bit stream (111); a second orthogonal transformation unit (114) which performs discrete cosine transform on a decoded image signal (113); and a modification information generation unit (104) which generates, based on input image DCT coefficients (103) and decoded image DCT coefficients (115), coefficient modification information (105) used for modifying orthogonal transformation coefficients obtained by performing orthogonal transformation on a decoded video signal obtained from a coded bit stream.
    • 提供了一种能够在抑制增加分辨率所需的数据量的同时提高图像的分辨率和质量的视频编码方法和视频解码方法。 视频编码装置(100)包括:对输入图像信号(101)进行离散余弦变换的第一正交变换单元(102); 对所述输入图像信号(101)进行低通滤波的低通滤波器(116); 下采样单元(108),其对低频图像信号(117)的分辨率进行下采样; 编码单元,其对压缩图像信号进行压缩编码; 对编码比特流(111)进行解码的本地解码单元(112); 对解码图像信号进行离散余弦变换的第二正交变换单元(114); 以及修改信息生成单元,其根据输入图像DCT系数(103)和解码图像DCT系数(115)生成用于修正通过对解码后的图像进行正交变换而获得的正交变换系数的系数修正信息(105) 从编码比特流获得的视频信号。