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    • 54. 发明授权
    • Image coding apparatus, image coding method and image coding program
    • 图像编码装置,图像编码方法以及图像编码程序
    • US08184716B2
    • 2012-05-22
    • US12234741
    • 2008-09-22
    • Tomoya KodamaAtsushi MatsumuraNoboru YamaguchiTatsuaki Iwata
    • Tomoya KodamaAtsushi MatsumuraNoboru YamaguchiTatsuaki Iwata
    • H04N11/02G06K9/46
    • H04N19/103H04N19/142H04N19/147H04N19/176H04N19/61
    • The image coding apparatus is provided to realize image coding with little calculation quantity and through rate distortion optimization thereby maintaining a favorable image quality. The image coding apparatus includes a processing unit that conducts frequency transform and quantization on a block in a predetermined manner for a plurality of coding modes, each mode having a different coding process, a cost calculating unit that calculates a predictive coded quantity and coding distortion in a coding mode using a result of the quantization conducted by the processing unit and a residue to obtain a cost regarding the coding mode, a minimum coding cost selecting unit that selects a minimum coding cost among the coding costs calculated for respective coding modes, and a coding unit that conducts coding on the blocks in a coding mode associated with the minimum coding cost selected by the minimum coding cost selecting unit.
    • 提供图像编码装置以实现少量计算量和通过速率失真优化的图像编码,从而保持良好的图像质量。 该图像编码装置包括处理单元,对于多个编码模式,以预定的方式对块进行频率变换和量化,每个模式具有不同的编码处理,计算预测编码量和编码失真的成本计算单元 使用由处理单元进行的量化结果的编码模式和残差来获得关于编码模式的成本;最小编码成本选择单元,对于针对各个编码模式计算的编码成本中选择最小编码成本,以及 编码单元,其以与由最小编码成本选择单元选择的最小编码成本相关联的编码模式对块进行编码。
    • 55. 发明授权
    • Decoding apparatus and decoding method
    • 解码装置和解码方法
    • US07805016B2
    • 2010-09-28
    • US11557590
    • 2006-11-08
    • Noboru YamaguchiTomoya Kodama
    • Noboru YamaguchiTomoya Kodama
    • G06K9/40
    • H04N19/86H04N19/117H04N19/157H04N19/176H04N19/44
    • A decoding apparatus having a de-ringing filter to filter image data decoded from encoded image data by orthogonal transformation encoding. In the de-ringing filter, a subtracter generates an absolute value of difference between a value of a filter object pixel and a value of at least one pixel selected from pixels surrounding the filter object pixel on the image data. A comparator compares the absolute value with a threshold. A selector outputs the value of the at least one pixel if the absolute value is less than the threshold, and outputs the value of the filter object pixel if the absolute value is not less than the threshold. A convolution operator convolutes a filter coefficient with the value output from the selector, and outputs a convolution result as a filtered value of the filter object pixel.
    • 一种具有去环形滤波器的解码装置,用于通过正交变换编码对从编码图像数据解码的图像数据进行滤波。 在去环滤波器中,减法器产生滤波器对象像素的值与从图像数据上的过滤器对象像素周围的像素中选择的至少一个像素的值之间的差的绝对值。 比较器将绝对值与阈值进行比较。 如果绝对值小于阈值,则选择器输出至少一个像素的值,如果绝对值不小于阈值,则输出滤波器对象像素的值。 卷积运算符将滤波器系数与从选择器输出的值进行卷积,并且将卷积结果输出为滤波器对象像素的滤波值。
    • 57. 发明授权
    • Video encoding apparatus and video decoding apparatus
    • 视频编码装置和视频解码装置
    • US07215709B2
    • 2007-05-08
    • US10971284
    • 2004-10-25
    • Noboru YamaguchiToshiaki WatanabeTakashi IdaYoshihiro Kikuchi
    • Noboru YamaguchiToshiaki WatanabeTakashi IdaYoshihiro Kikuchi
    • H04B1/66
    • H04N19/59H04N19/20
    • An alpha-map encoding apparatus includes a first down-sampling circuit (21) for down-sampling an alpha-map signal which represents the shape of an object and the position in the frame of the object at a down-sampling ratio based on size conversion ratio information, an up-sampling circuit (23) for up-sampling the alpha-map signal at an up-sampling ratio based on size conversion ratio information given to restore the down-sampled alpha-map signal to an original size, and outputting a local decoded alpha-map signal, a motion estimation/compensation circuit (25) for generating a motion estimation/compensation signal on the basis of the previous decoded video signal and a motion vector signal, a second down-sampling circuit (26) for down-sampling the motion estimation/compensation signal at the down-sampling ratio, a binary image encoder for encoding the alpha-map signal down-sampled by the first down-sampling circuit to a binary image in accordance with the motion estimation/compensation signal down-sampled by the second down-sampling circuit, and outputting an encoded binary image signal, and a multiplexer for multiplexing and outputting the encoded binary image signal and the up-sampling ratio information.
    • 阿尔法 - 地图编码装置包括:第一下采样电路(21),用于以基于尺寸的下采样比下降采样表示对象的形状和对象的帧中的位置的阿尔法 - 转换比信息,上采样电路(23),用于基于给定的大小转换比率信息以上取样比对上述阿尔法 - 映射信号进行上采样以将下采样的阿尔法 - 映射信号恢复到原始大小;以及 输出局部解码的阿尔法 - 映射信号,基于先前解码的视频信号和运动矢量信号产生运动估计/补偿信号的运动估计/补偿电路(25),第二下采样电路(26) 用于以下采样比对运动估计/补偿信号进行下采样的二进制图像编码器,用于根据运动估计/运算将由第一下采样电路下采样的阿尔法 - 映射信号编码为二进制图像 由第二下采样电路进行下采样的信号信号,并输出编码的二进制图像信号,以及多路复用器,用于复用并输出编码的二进制图像信号和上采样比信息。