公开(公告)号：US08687904B2

公开(公告)日：2014-04-01

申请号：US13348075

申请日：2012-01-11

申请人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio

发明人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio

IPC分类号： G06K9/36 ,  G06K9/46 ,  H03M7/40 ,  H04N7/26

CPC分类号： H03M7/4018 ,  H04N19/13 ,  H04N19/136 ,  H04N19/18 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

摘要： An image coding method includes: frequency-transforming image data to generate a unit of processing in a frequency domain; binarizing a coefficient included in the unit of processing, to generate a binary signal; determining, as a context for a binary signal, one or more contexts common to a plurality of the coefficients included in a segment which includes the binarized coefficient, the segment being one of a plurality of segments obtained by dividing the unit of processing; performing binary arithmetic coding on the binary signal according to probability information corresponding to the determined context; and updating, based on the binary signal, the probability information corresponding to the determined context.

摘要翻译： 图像编码方法包括：对图像数据进行频率变换，生成频域的处理单位; 二值化包含在处理单元中的系数，以产生二进制信号; 确定作为二进制信号的上下文，包括包括在二进制化系数的段中的多个系数共同的一个或多个上下文，该段是通过划分处理单位而获得的多个段中的一个; 根据对应于所确定的上下文的概率信息对二进制信号执行二进制算术编码; 以及基于所述二进制信号更新与所确定的上下文相对应的概率信息。

公开(公告)号：US20130301736A1

公开(公告)日：2013-11-14

申请号：US13980918

申请日：2012-01-26

申请人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

发明人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

IPC分类号： H04N7/36

CPC分类号： H04N19/51 ,  H04N19/109 ,  H04N19/119 ,  H04N19/137 ,  H04N19/147 ,  H04N19/176 ,  H04N19/52 ,  H04N19/61

摘要： An image coding method of coding a current block to be coded using a first reference index indicating a first reference picture and a first motion vector, includes: calculating, using a second reference index and a second motion vector used to code a corresponding block, a third reference index and a third motion vector as respective candidates for the first reference index and the first motion vector; determining a value of a flag that indicates whether or not to code the current block using the third reference index and the third motion vector as the first reference index and the first motion vector; and coding the current block using the first reference index and the first motion vector according to the value of the flag, and adding the value of the flag to a bitstream generated by the coding.

摘要翻译： 一种使用指示第一参考图像和第一运动矢量的第一参考索引对要编码的当前块进行编码的图像编码方法包括：使用用于对相应块编码的第二参考索引和第二运动矢量来计算， 第三参考索引和第三运动矢量作为第一参考索引和第一运动矢量的相应候选; 使用第三参考索引和第三运动矢量作为第一参考索引和第一运动矢量来确定指示是否对当前块进行编码的标志的值; 以及根据所述标志的值使用所述第一参考索引和所述第一运动矢量对所述当前块进行编码，以及将所述标志的值与由所述编码生成的比特流相加。

公开(公告)号：US20130148729A1

公开(公告)日：2013-06-13

申请号：US13817836

申请日：2011-12-05

申请人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio

发明人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio

IPC分类号： H04N7/26

CPC分类号： H04N19/96 ,  H04N19/119 ,  H04N19/124 ,  H04N19/147 ,  H04N19/17 ,  H04N19/182 ,  H04N19/19 ,  H04N19/463 ,  H04N19/61 ,  H04N19/70

摘要： An image coding method according to the present invention partitions an input image signal into processing units, and codes the partitioned image to generate a code sequence, the image coding method including: determining a partitioning pattern for hierarchically partitioning the input image signal in order starting from a largest unit of the processing units; generating partition information indicative of the partitioning pattern; and coding partition information, wherein the partition information includes maximum used hierarchy depth information indicative of a maximum used hierarchy depth which is a hierarchy depth of a deepest processing unit of the processing units included in the partitioning pattern.

摘要翻译： 根据本发明的图像编码方法将输入图像信号划分为处理单元，并对分割图像进行编码以生成代码序列，该图像编码方法包括：确定划分图案，以分级划分输入图像信号，从 处理单位最大单位; 生成表示分割模式的分区信息; 以及编码分区信息，其中所述分区信息包括指示最大使用层次深度的最大使用层级深度信息，所述最大使用层级深度是包括在所述划分模式中的处理单元的最深处理单元的层次深度。

公开(公告)号：US20130142255A1

公开(公告)日：2013-06-06

申请号：US13817316

申请日：2012-06-26

申请人： Toru Matsunobu ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai ,  Kyoko Tanikawa ,  Toshiyasu Sugio

发明人： Toru Matsunobu ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai ,  Kyoko Tanikawa ,  Toshiyasu Sugio

IPC分类号： H04N7/26

CPC分类号： H04N19/176 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/154 ,  H04N19/17 ,  H04N19/172 ,  H04N19/46 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61 ,  H04N19/90 ,  H04N19/93

摘要： An image coding method includes: generating a predicted block; calculating a residual block; calculating quantized coefficients by performing transform and quantization on the residual block; calculating a coded residual block by performing inverse quantization and inverse transform on the quantized coefficients; generating a temporary coded block; determining whether or not an offset process is required, to generate first flag information indicating a result of the determination; executing the offset process on the temporary coded block when it is determined that the offset process is required; and performing variable-length coding on the quantized coefficients and the first flag information.

公开(公告)号：US20130142254A1

公开(公告)日：2013-06-06

申请号：US13816370

申请日：2011-09-21

申请人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

发明人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

IPC分类号： H04N7/26

CPC分类号： H04N19/115 ,  H04N19/103 ,  H04N19/146 ,  H04N19/172 ,  H04N19/176 ,  H04N19/51 ,  H04N19/52

摘要： An image coding method includes: generating a first flag indicating whether or not a motion vector predictor is to be selected from among one or more motion vector predictor candidates; generating a second flag indicating whether or not a motion vector predictor is to be selected from among the one or more motion vector predictor candidates in coding a current block to be coded in a predetermined coding mode, when the first flag indicates that a motion vector predictor is to be selected; and generating a coded signal in which the first flag and the second flag are included in header information, when the first flag indicates that a motion vector predictor is to be selected.

公开(公告)号：US20130136373A1

公开(公告)日：2013-05-30

申请号：US13813759

申请日：2012-03-01

申请人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio

发明人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio

IPC分类号： G06T9/00

CPC分类号： H04N19/51 ,  G06T9/004 ,  H04N19/105 ,  H04N19/117 ,  H04N19/137 ,  H04N19/139 ,  H04N19/167 ,  H04N19/17 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/52

摘要： An image decoding method for decoding an image including slices while reducing both a decrease in image quality and a decrease in coding efficiency is provided. The image decoding method includes: decoding a current motion vector which is a motion vector of a current block to be decoded and specifies a reference block included in a reference picture, and a difference image block indicating a difference between the current block and a prediction image block; generating the prediction image block by allocating, to an outside pixel that is a pixel included in the reference block and located outside an associated slice that is a slice corresponding to a current slice to be decoded which includes the current block, a value of an inside pixel that is a pixel located inside the associated slice; and adding up the difference image block and the prediction image block to reconstruct the current block.

摘要翻译： 提供一种图像解码方法，用于对包括切片的图像进行解码，同时减少图像质量的降低和编码效率的降低。 图像解码方法包括：对作为要解码的当前块的运动矢量的当前运动矢量进行解码，并指定参考图像中包含的参考块，以及指示当前块与预测图像之间的差的差分图像块 块; 通过将包括在参考块中并且位于与包括当前块的要解码的当前切片相对应的切片的关联切片外的位置的外部像素分配给内部的值，生成预测图像块 像素，其是位于相关联的切片内的像素; 并且将差分图像块和预测图像块相加以重构当前块。

公开(公告)号：US20130136170A1

公开(公告)日：2013-05-30

申请号：US13814564

申请日：2011-11-22

申请人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

发明人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

IPC分类号： H04N7/26 ,  H04N7/28

CPC分类号： H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/52

摘要： A motion vector calculation method which attains a higher compression rate, includes: a selection step of selecting one of at least one reference motion vector of a reference block; and a calculation step of calculating a motion vector of a current block to be processed, using the one reference motion vector selected in the selection step, and in the selection step, when the reference block has two reference motion vectors, one of the two reference motion vectors is selected based on whether the reference block is located before or after the current block in display time order, and when the reference block has only one reference motion vector, the one reference motion vector is selected.

摘要翻译： 获得更高压缩率的运动矢量计算方法包括：选择步骤，选择参考块的至少一个参考运动矢量中的一个; 以及计算步骤，使用在所述选择步骤中选择的所述一个参考运动矢量来计算要处理的当前块的运动矢量，并且在所述选择步骤中，当所述参考块具有两个参考运动矢量时，所述两个参考中的一个 基于参考块是否以显示时间顺序位于当前块之前或之后选择运动矢量，并且当参考块仅具有一个参考运动矢量时，选择一个参考运动矢量。

公开(公告)号：US20130034165A1

公开(公告)日：2013-02-07

申请号：US13639524

申请日：2011-04-12

申请人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara

发明人： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara

IPC分类号： H04N7/32

CPC分类号： H04N19/117 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/513 ,  H04N19/86

摘要： An image coding method for coding an input image per block to generate a coded image signal includes: predicting for each prediction unit which is an area obtained by partitioning a target block to generate a prediction image of the target block; comparing a transform unit which is an area obtained by partitioning the target block and is a processing unit for frequency transform with the prediction unit, to detect part of a boundary of the prediction unit, the boundary being located within the transform unit; performing boundary filtering on the detected part of the boundary in the generated prediction image; calculating a difference between a filtered prediction image and the input image to generate a difference image of the target block; and performing frequency transform on the difference image for each transform unit.

摘要翻译： 一种用于编码每个块的输入图像以生成编码图像信号的图像编码方法包括：对作为通过划分目标块而获得的区域的每个预测单元预测生成目标块的预测图像; 比较作为通过划分目标块而获得的区域的变换单元，并且是用于与预测单元进行频率变换的处理单元，以检测位于变换单元内的边界的预测单元的边界的一部分; 对生成的预测图像中的检测出的边界部分进行边界滤波; 计算滤波后的预测图像和输入图像之间的差以产生目标块的差分图像; 并对每个变换单元对差分图像进行频率变换。

公开(公告)号：US20130003836A1

公开(公告)日：2013-01-03

申请号：US13535406

申请日：2012-06-28

申请人： Hisao SASAI ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio ,  Kyoko Tanikawa ,  Toru Matsunobu

发明人： Hisao SASAI ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio ,  Kyoko Tanikawa ,  Toru Matsunobu

IPC分类号： H04N7/32 ,  H04N7/26

CPC分类号： H04N19/91 ,  H04N19/103 ,  H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70

摘要： The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is “intra_chroma_pred_mode”.

摘要翻译： 图像解码方法包括：从多个上下文中确定要处理的当前块中使用的上下文; 以及使用所确定的上下文对与当前块相对应的比特序列执行算术解码，其中在所述确定中：在使用当前块的相邻块的控制参数的条件下确定所述上下文，当所述信号类型为 第一类型，相邻块是当前块的左块和上块; 并且在信号类型是第二类型的情况下，在不使用上部块的控制参数的条件下确定上下文，并且第二类型是intra_chroma_pred_mode。

公开(公告)号：US20120328010A1

公开(公告)日：2012-12-27

申请号：US13530218

申请日：2012-06-22

申请人： Hisao SASAI ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio ,  Kyoko Tanikawa ,  Toru Matsunobu

发明人： Hisao SASAI ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio ,  Kyoko Tanikawa ,  Toru Matsunobu

IPC分类号： H04N7/26 ,  H04N7/32

CPC分类号： H04N19/157 ,  H04N19/13 ,  H04N19/176 ,  H04N19/197 ,  H04N19/463

摘要： The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type.

摘要翻译： 图像解码方法包括：从多个上下文中确定要处理的当前块中使用的上下文; 以及使用所确定的上下文对与当前块相对应的比特序列执行算术解码，其中在所述确定中：在使用当前块的相邻块的控制参数的条件下确定所述上下文，当所述信号类型为 第一类型，相邻块是当前块的左块和上块; 并且当信号类型是第二类型时，在不使用上部块的控制参数的条件下确定上下文。