公开(公告)号：US20140341301A1

公开(公告)日：2014-11-20

申请号：US14451492

申请日：2014-08-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Chong Soon LIM ,  Viktor WAHADANIAH ,  Sue Mon Thet NAING ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Hisao SASAI ,  Toshiyasu SUGIO

IPC: H04N19/44

CPC classification number: H04N19/184 ,  G06T9/00 ,  G06T9/004 ,  G11B20/10 ,  G11B20/10527 ,  H04N19/103 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/40 ,  H04N19/426 ,  H04N19/44 ,  H04N19/46 ,  H04N19/593 ,  H04N19/70 ,  H04N19/85

Abstract: The image coding method is used to code images to generate a coded stream. The image coding method includes: writing, into a sequence parameter set in the coded stream to be generated, a first parameter representing a first bit-depth that is a bit-depth of a reconstructed sample in the images; and writing, into the sequence parameter set, a second parameter which is different from the first parameter and represents a second bit-depth that is a bit-depth of an Intra Pulse Code Modulation (IPCM) sample in the images.

公开(公告)号：US20140341298A1

公开(公告)日：2014-11-20

申请号：US14453917

申请日：2014-08-07

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Viktor WAHADANIAH ,  Chong Soon LIM ,  Sue Mon Thet NAING ,  Hai Wei SUN ,  Toshiyasu SUGIO ,  Takahiro NISHI ,  Hisao SASAI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Toru MATSUNOBU ,  Kengo TERADA

IPC: H04N19/51 ,  H04N19/583

CPC classification number: H04N19/51 ,  H04N19/176 ,  H04N19/513 ,  H04N19/52

Abstract: An image coding method includes: deriving a candidate for a motion vector predictor from a neighboring motion vector; adding the candidate to a list; selecting a motion vector predictor from the list; coding a current block; and coding a current motion vector. In the deriving, the candidate is derived according to a first derivation scheme when each of a current reference picture and a neighboring reference picture is determined to be a long-term reference picture, and the candidate is derived according to a second derivation scheme when each of a current reference picture and a neighboring reference picture is determined to be a short-term reference picture.

公开(公告)号：US20140334544A1

公开(公告)日：2014-11-13

申请号：US14446459

申请日：2014-07-30

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Virginie DRUGEON ,  Youji SHIBAHARA ,  Takahiro NISHI ,  Hisao SASAI ,  Kyoko TANIKAWA

IPC: H04N19/593 ,  H04N19/44 ,  H04N19/136

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/42 ,  H04N19/44

Abstract: A spatial prediction method capable of reducing the complexity of spatial prediction includes: detecting an edge (E) overlapping the current block by obtaining a horizontal gradient (Gy) and a vertical gradient (Gx) between pixels within a block adjacent to the current block; calculating an integer slope of the edge; determining, for each pixel position within the current block, a sub-pel position being an intersection between (i) a line that has the integer slope and passes through the pixel position and (ii) a boundary of the adjacent block; and predicting, for each pixel position, a pixel value at the pixel position based on a pixel value interpolated in the sub-pel position, wherein the boundary of the adjacent block is a row or a column that is the closest to the current block, among rows or columns of pixels included in the adjacent block.

Abstract translation: 能够降低空间预测的复杂度的空间预测方法包括：通过获得与当前块相邻的块内的像素之间的水平梯度（Gy）和垂直梯度（Gx）来检测与当前块重叠的边缘（E） 计算边缘的整数斜率; 确定对于当前块中的每个像素位置，子像素位置是（i）具有整数斜率并通过像素位置的线和（ii）相邻块的边界之间的交点; 并且对于每个像素位置，基于在子像素位置内插的像素值来预测像素位置处的像素值，其中相邻块的边界是最接近当前块的行或列， 包括在相邻块中的像素列或像素列中。

公开(公告)号：US20160057451A1

公开(公告)日：2016-02-25

申请号：US14933221

申请日：2015-11-05

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Virginie DRUGEON ,  Youji SHIBAHARA ,  Takahiro NISHI ,  Hisao SASAI ,  Kyoko TANIKAWA

IPC: H04N19/593 ,  H04N19/44 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/42 ,  H04N19/44

Abstract: A spatial prediction method capable of reducing the complexity of spatial prediction includes: detecting an edge (E) overlapping the current block by obtaining a horizontal gradient (Gy) and a vertical gradient (Gx) between pixels within a block adjacent to the current block; calculating an integer slope of the edge; determining, for each pixel position within the current block, a sub-pel position being an intersection between (i) a line that has the integer slope and passes through the pixel position and (ii) a boundary of the adjacent block; and predicting, for each pixel position, a pixel value at the pixel position based on a pixel value interpolated in the sub-pel position, wherein the boundary of the adjacent block is a row or a column that is the closest to the current block, among rows or columns of pixels included in the adjacent block.

公开(公告)号：US20160050444A1

公开(公告)日：2016-02-18

申请号：US14927961

申请日：2015-10-30

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kengo TERADA ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toshiyasu SUGIO ,  Toru MATSUNOBU

IPC: H04N19/91 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

CPC classification number: H04N19/91 ,  H03M7/4006 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/463 ,  H04N19/60 ,  H04N19/61

Abstract: An image coding method using arithmetic coding. The method includes: performing arithmetic coding on a first flag that indicates whether or not an absolute value of a target coefficient in a target coefficient block is greater than 1; and performing arithmetic coding on a second flag that indicates whether or not the absolute value is greater than 2. In the arithmetic coding on the first flag and the arithmetic coding on the second flag, it is determined whether or not an immediately-prior coefficient block that has been coded immediately prior to the target coefficient block includes a coefficient having an absolute value greater than a threshold value. Based on a result of the determination, respective contexts to be used in the arithmetic coding on the first and second flags are selected.

公开(公告)号：US20150373371A1

公开(公告)日：2015-12-24

申请号：US14842201

申请日：2015-09-01

Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Inventor： Hisao SASAI ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Toshiyasu SUGIO ,  Kyoko TANIKAWA ,  Toru MATSUNOBU

IPC: H04N19/593 ,  H04N19/91 ,  H04N19/44 ,  H04N19/136 ,  H04N19/184

CPC classification number: H04N19/593 ,  G06T9/004 ,  H04N19/13 ,  H04N19/136 ,  H04N19/184 ,  H04N19/186 ,  H04N19/44 ,  H04N19/91

Abstract: A data conversion system includes an encoding device configured to encode, into a bitstream, pieces of binary data indicating first intra prediction modes for encoding a first image, and a decoding device configured to decode second intra prediction modes for decoding a second image. A data conversion method includes encoding, into a bitstream, pieces of binary data indicating first intra prediction modes for encoding a first image, and decoding second intra prediction modes for decoding a second image.

Abstract translation: 一种数据转换系统，包括：编码装置，被配置为将表示用于对第一图像进行编码的第一帧内预测模式的二进制数据编码为比特流;以及解码装置，被配置为解码用于解码第二图像的第二帧内预测模式。 一种数据转换方法包括将表示用于对第一图像进行编码的第一帧内预测模式的二进制数据编码到比特流中，以及对用于解码第二图像的第二帧内预测模式进行解码。

公开(公告)号：US20150271489A1

公开(公告)日：2015-09-24

申请号：US14725180

申请日：2015-05-29

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Toshiyasu SUGIO ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toru MATSUNOBU

IPC: H04N19/105 ,  H04N19/52

CPC classification number: H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/52 ,  H04N19/573 ,  H04N19/70 ,  H04N19/96

Abstract: An image decoding method for decoding, on a block-by-block basis, image data included in a coded bitstream includes: obtaining a fixed number of merging candidates each of which is a candidate set of a prediction direction, a motion vector, and a reference picture index which are to be referenced in decoding of a current block (S303); and obtaining, from the coded bitstream, an index for identifying a merging candidate for the current block (S304), wherein the fixed number of merging candidates include: one or more first candidates each derived based on a prediction direction, a motion vector, and a reference picture index which have been used for decoding a neighboring block spatially or temporally neighboring the current block; and one or more second candidates having a predetermined fixed. The fixed number is greater than or equal to two.

Abstract translation: 一种用于逐块地解码包括在编码比特流中的图像数据的图像解码方法，包括：获得固定数量的合并候选，每个合并候选是预测方向的候选组，运动矢量和 在当前块的解码中参考的参考图像索引（S303）; 从编码比特流获得用于识别当前块的合并候选的索引（S304），其中，所述固定次数的合并候选包括：基于预测方向，运动向量和 已经用于在空间上或时间上邻近当前块解码相邻块的参考图像索引; 以及具有预定固定的一个或多个第二候选者。 固定数大于等于2。

公开(公告)号：US20150245031A1

公开(公告)日：2015-08-27

申请号：US14707200

申请日：2015-05-08

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kengo TERADA ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toshiyasu SUGIO ,  Toru MATSUNOBU

IPC: H04N19/136 ,  H04N19/44 ,  H04N19/176 ,  H04N19/60

CPC classification number: H04N19/176 ,  G06T9/007 ,  H04N19/122 ,  H04N19/136 ,  H04N19/186 ,  H04N19/44 ,  H04N19/60 ,  H04N19/70

Abstract: An image coding method of coding an image on a per coding unit basis, the method comprising: applying a frequency transform to luminance data and chrominance data of transform units in the coding unit including predetermined blocks each corresponding to one or more of the transform units; and coding the luminance data and the chrominance data to which the frequency transform has been applied to generate a bitstream in which the luminance data and the chrominance data are grouped on a per predetermined block basis.

Abstract translation: 一种基于每个编码单元对图像进行编码的图像编码方法，所述方法包括：对包括对应于一个或多个变换单元的预定块的编码单元中的变换单元的亮度数据和色度数据应用频率变换; 对已经应用了频率变换的亮度数据和色度数据进行编码，生成亮度数据和色度数据按每个预定块为基础分组的比特流。

公开(公告)号：US20150208088A1

公开(公告)日：2015-07-23

申请号：US14674182

申请日：2015-03-31

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Viktor WAHADANIAH ,  Chong Soon LIM ,  Sue Mon Thet NAING ,  Hai Wei SUN ,  Toshiyasu SUGIO ,  Takahiro NISHI ,  Hisao SASAI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Toru MATSUNOBU ,  Kengo TERADA

IPC: H04N19/56 ,  H04N19/513 ,  H04N19/172 ,  H04N19/176

CPC classification number: H04N19/56 ,  H04N19/172 ,  H04N19/176 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/58 ,  H04N19/61

Abstract: An image coding method includes: deriving a candidate for a motion vector predictor from a co-located motion vector; adding the candidate to a list; selecting the motion vector predictor from the list; and coding a current block and coding a current motion vector, wherein the deriving includes: deriving the candidate by a first derivation scheme in the case of determining that each of a current reference picture and a co-located reference picture is a long-term reference picture; and deriving the candidate by a second derivation scheme in the case of determining that each of the current reference picture and the co-located reference picture is a short-term reference picture.

Abstract translation: 一种图像编码方法包括：从同位置运动矢量导出运动矢量预测器的候选; 将候选人添加到列表中; 从列表中选择运动矢量预测器; 并且对当前块进行编码并对当前运动矢量进行编码，其中所述导出包括：在确定当前参考图像和同位置参考图片中的每一个是长期参考的情况下，通过第一导出方案导出候选 图片; 以及在确定当前参考图片和所述同位置参考图片中的每一个是短期参考图片的情况下，通过第二导出方案导出所述候选者。

公开(公告)号：US20150131725A1

公开(公告)日：2015-05-14

申请号：US14590497

申请日：2015-01-06

Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Inventor： Toshiyasu SUGIO ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toru MATSUNOBU

IPC: H04N19/513 ,  H04N19/577

CPC classification number: H04N19/521 ,  H04N19/105 ,  H04N19/176 ,  H04N19/463 ,  H04N19/513 ,  H04N19/577 ,  H04N19/61 ,  H04N19/65 ,  H04N19/70

Abstract: An image coding method for coding a current block derives a first candidate having a first motion vector that has been used to code a first block. It is determined whether a total number of one or more candidates having the first candidate is less than a maximum candidate number, and a second candidate is derived when the total number of the one or more candidates is less than the maximum candidate number. The second candidate has a second motion vector and is different from the first candidate. A candidate for coding the current block is selected from the candidates having the first candidate and the second candidate.

Abstract translation: 用于编码当前块的图像编码方法导出具有用于对第一块进行编码的第一运动矢量的第一候选。 确定具有第一候选的一个或多个候选的总数是否小于最大候选数，并且当一个或多个候选的总数小于最大候选数时导出第二候选。 第二候选者具有第二运动矢量并且与第一候选者不同。 从具有第一候选和第二候选的候选中选择用于编码当前块的候选。