公开(公告)号：US08718149B2

公开(公告)日：2014-05-06

申请号：US13148957

申请日：2010-10-13

Applicant: Takeshi Tanaka ,  Hisao Sasai

Inventor： Takeshi Tanaka ,  Hisao Sasai

IPC: H04N7/26 ,  H04N7/50 ,  H03M7/40

CPC classification number: H04N19/44 ,  H03M7/4006 ,  H03M7/4018 ,  H04N19/13 ,  H04N19/176 ,  H04N19/194 ,  H04N19/46 ,  H04N19/61 ,  H04N19/91

Abstract: An image coding method for improving coding efficiency by using more appropriate probability information is provided. The image coding method includes: a first coding step of coding a first set of blocks included in a first region sequentially based on first probability information; and a second coding step of coding a second set of blocks included in a second region sequentially based on second probability information. In the first coding step, the first probability information is updated depending on data of a target block to be coded, after coding the target block and before coding a next target block. In the second coding step, the second probability information is updated depending on the first probability information updated in the first coding step, before coding the first target block.

Abstract translation: 提供了一种通过使用更合适的概率信息来提高编码效率的图像编码方法。 图像编码方法包括：第一编码步骤，基于第一概率信息，顺序地编码包括在第一区域中的第一组块; 以及第二编码步骤，基于第二概率信息顺序地对包括在第二区域中的第二组块进行编码。 在第一编码步骤中，根据要编码的目标块的数据，在对目标块进行编码之后并在编码下一个目标块之前更新第一概率信息。 在第二编码步骤中，在对第一目标块进行编码之前，根据在第一编码步骤中更新的第一概率信息来更新第二概率信息。

公开(公告)号：US20110317769A1

公开(公告)日：2011-12-29

申请号：US13148957

申请日：2010-10-13

Applicant: Takeshi Tanaka ,  Hisao Sasai

Inventor： Takeshi Tanaka ,  Hisao Sasai

IPC: H04N7/26

CPC classification number: H04N19/44 ,  H03M7/4006 ,  H03M7/4018 ,  H04N19/13 ,  H04N19/176 ,  H04N19/194 ,  H04N19/46 ,  H04N19/61 ,  H04N19/91

Abstract: An image coding method for improving coding efficiency by using more appropriate probability information is provided. The image coding method includes: a first coding step (S811) of coding a first set of blocks included in a first region sequentially based on first probability information; and a second coding step (S812) of coding a second set of blocks included in a second region sequentially based on second probability information. In the first coding step (S811), the first probability information is updated depending on data of a target block to be coded, after coding the target block and before coding a next target block. In the second coding step (S812), the second probability information is updated depending on the first probability information updated in the first coding step (S811), before coding the first target block.

Abstract translation: 提供了一种通过使用更合适的概率信息来提高编码效率的图像编码方法。 图像编码方法包括：基于第一概率信息，顺序地对包含在第一区域中的第一组块进行编码的第一编码步骤（S811） 以及基于第二概率信息顺序地对包括在第二区域中的第二组块进行编码的第二编码步骤（S812）。 在第一编码步骤（S811）中，根据要编码的目标块的数据，在对目标块进行编码之后并对下一个目标块进行编码之前，更新第一概率信息。 在第二编码步骤（S812）中，在对第一目标块进行编码之前，根据第一编码步骤（S811）中更新的第一概率信息来更新第二概率信息。

公开(公告)号：US09712846B2

公开(公告)日：2017-07-18

申请号：US13640388

申请日：2011-04-11

Applicant: Matthias Narroschke ,  Hisao Sasai

Inventor： Matthias Narroschke ,  Hisao Sasai

IPC: H04N19/82 ,  H04N19/86 ,  H04N19/147 ,  H04N19/46 ,  H04N19/61 ,  H04N19/117 ,  H04N19/136 ,  H04N19/48 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/147 ,  H04N19/439 ,  H04N19/44 ,  H04N19/46 ,  H04N19/48 ,  H04N19/61 ,  H04N19/615 ,  H04N19/635 ,  H04N19/68 ,  H04N19/80 ,  H04N19/82 ,  H04N19/86

Abstract: The present invention relates to a method for encoding and decoding an image signal and to corresponding apparatuses therefor. In particular, during the encoding and/or decoding of an image signal filtering with at least two filters is performed. The sequence of the filter application and possibly the filters are selected and the filtering is applied in the selected filtering order and with the selected filters. The determination of the sequence of applying the filters may be performed either separately in the same way at the encoder and at the decoder, or, it may be determined at the encoder and signaled to the decoder.

公开(公告)号：US09445129B2

公开(公告)日：2016-09-13

申请号：US13639524

申请日：2011-04-12

Applicant: Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara

Inventor： Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara

IPC: H04N19/86 ,  H04N19/176 ,  H04N19/122 ,  H04N19/117 ,  H04N19/18

CPC classification number: H04N19/117 ,  H04N19/122 ,  H04N19/176 ,  H04N19/18 ,  H04N19/513 ,  H04N19/86

Abstract: 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.

Abstract translation: 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：US09363525B2

公开(公告)日：2016-06-07

申请号：US13534363

申请日：2012-06-27

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

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

IPC: H04N7/26 ,  H04M7/00 ,  H04N19/463 ,  H04N19/176 ,  H04N19/70 ,  H04N19/13 ,  H04N19/134 ,  H04N19/593 ,  H04N19/159 ,  H04N19/12

CPC classification number: H04N19/134 ,  H04N19/12 ,  H04N19/13 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70

Abstract: 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 “no_residual_data_flag”.

Abstract translation: 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且第二类型是“no_residual_data_flag”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。

公开(公告)号：US09167247B2

公开(公告)日：2015-10-20

申请号：US13810736

申请日：2012-05-18

Applicant: Viktor Wahadaniah ,  Chong Soon Lim ,  Sue Mon Thet Naing ,  Jin Li ,  Haiwei Sun ,  Takahiro Nishi ,  Hisao Sasai ,  Youji Shibahara ,  Kyoko Tanikawa ,  Toshiyasu Sugio ,  Toru Matsunobu

Inventor： Viktor Wahadaniah ,  Chong Soon Lim ,  Sue Mon Thet Naing ,  Jin Li ,  Haiwei Sun ,  Takahiro Nishi ,  Hisao Sasai ,  Youji Shibahara ,  Kyoko Tanikawa ,  Toshiyasu Sugio ,  Toru Matsunobu

IPC: H04N19/61 ,  H04N19/103 ,  H04N19/50 ,  H04N19/176 ,  H04N19/46 ,  H04N19/186

CPC classification number: H04N19/50 ,  H04N19/103 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/61

Abstract: Methods and apparatuses for performing inter-color-plane prediction with adaptability to various existing video content representations are provided. A plurality of predetermined rescaling schemes based on a color plane format is selected. A first block of original samples of a first color plane is encoded into a compressed bitstream. A block of reconstructed samples of the first color plane is reconstructed. An inter-color-plane prediction process is performed to produce samples of a second color plane. Said block of prediction samples of the second color plane is subtracted from a second block of original samples of the second color plane to produce a block of residual samples of the second color plane where the positions of the first block and the second block of original samples are aligned. Finally, the block of residual samples of the second color plane is encoded.

Abstract translation: 提供了用于对各种现有视频内容表示适应性进行彩色间预测的方法和装置。 选择基于彩色平面格式的多个预定重定标方案。 将第一颜色平面的原始样本的第一块编码为压缩比特流。 重建第一色平面的重建样本块。 执行色间平面预测处理以产生第二色平面的样本。 从第二颜色平面的原始样本的第二块中减去所述第二颜色平面的预测样本块，以产生第二颜色平面的残差样本块，其中第一块和第二块原始样本的位置 对齐。 最后，编码第二色平面的残差样本块。

公开(公告)号：US09100655B2

公开(公告)日：2015-08-04

申请号：US13638681

申请日：2011-04-01

Applicant: Youji Shibahara ,  Steffen Wittmann ,  Takahiro Nishi ,  Hisao Sasai ,  Kyoko Tanikawa

Inventor： Youji Shibahara ,  Steffen Wittmann ,  Takahiro Nishi ,  Hisao Sasai ,  Kyoko Tanikawa

IPC: H04N19/51

CPC classification number: H04N19/51

Abstract: A motion compensation method includes: specifying, using a motion vector of a current block, a reference image area for use in motion compensation for each of the current block and a current sub-block spatially adjacent to the current block, to read out reference pixel data of the specified area from a frame memory; performing motion compensation using the reference pixel data read out in the readout, to generate prediction pixel data for each of the current block and the current sub-block; outputting the prediction pixel data for the current block, generated in the performing of motion compensation; and temporarily storing the prediction pixel data for the current sub-block, generated in the performing of motion compensation.

Abstract translation: 运动补偿方法包括：使用当前块的运动矢量指定用于当前块中的每一个的运动补偿的参考图像区域和与当前块空间相邻的当前子块，以读出参考像素 来自帧存储器的指定区域的数据; 使用在读出中读出的参考像素数据执行运动补偿，以生成当前块和当前子块中的每一个的预测像素数据; 输出在执行运动补偿中产生的当前块的预测像素数据; 并且暂时存储在执行运动补偿中产生的当前子块的预测像素数据。

公开(公告)号：US08743969B2

公开(公告)日：2014-06-03

申请号：US13530218

申请日：2012-06-22

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

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

IPC: H04N7/12

CPC classification number: H04N19/157 ,  H04N19/13 ,  H04N19/176 ,  H04N19/197 ,  H04N19/463

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20140105283A1

公开(公告)日：2014-04-17

申请号：US14125753

申请日：2012-06-12

Applicant: Jin Li ,  Chong Soon Lim ,  Viktor Wahadaniah ,  Sue Mon Thet Naing ,  Hai Wei Sun ,  Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio ,  Kyoko Tanikawa ,  Toru Matsunobu

Inventor： Jin Li ,  Chong Soon Lim ,  Viktor Wahadaniah ,  Sue Mon Thet Naing ,  Hai Wei Sun ,  Hisao Sasai ,  Takahiro Nishi ,  Youji Shibahara ,  Toshiyasu Sugio ,  Kyoko Tanikawa ,  Toru Matsunobu

IPC: H04N19/124 ,  H04N19/129 ,  H04N19/159

CPC classification number: H04N19/157 ,  H04N19/11 ,  H04N19/124 ,  H04N19/126 ,  H04N19/129 ,  H04N19/159 ,  H04N19/176 ,  H04N19/625

Abstract: A method of encoding video using intra prediction mode dependent quantization matrix includes: calculating an array of quantizers for each size of block unit (100); encoding the arrays of quantizers into header of compressed video stream (102); selecting one scanning order based on a selected intra prediction mode among a plurality of scanning orders (112); scanning the array of quantizers to obtain a block of quantizers based on the selected scanning order (114).

Abstract translation: 使用帧内预测模式相关量化矩阵编码视频的方法包括：针对块单元（100）的每个大小计算量化器阵列; 将量化器阵列编码为压缩视频流（102）的报头; 在多个扫描顺序（112）中基于所选择的帧内预测模式选择一个扫描顺序; 扫描量化器阵列以基于所选择的扫描顺序获得量化器块（114）。

公开(公告)号：US08681872B2

公开(公告)日：2014-03-25

申请号：US13429538

申请日：2012-03-26

Applicant: Hisao Sasai ,  Satoshi Kondo

Inventor： Hisao Sasai ,  Satoshi Kondo

IPC: H04N11/04

CPC classification number: H04N19/59 ,  H04N19/33 ,  H04N19/46 ,  H04N19/467 ,  H04N19/48 ,  H04N19/50 ,  H04N19/60 ,  H04N19/80

Abstract: 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.

Abstract translation: 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。