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1. 发明申请

US20140192904A1 Method, apparatus and system for de-blocking video data 有权
标题翻译：用于解除视频数据的方法，装置和系统
公开(公告)号：US20140192904A1
公开(公告)日：2014-07-10
申请号：US14145249
申请日：2013-12-31
申请人： Canon Kabushiki Kaisha
发明人： CHRISTOPHER JAMES ROSEWARNE
IPC分类号： H04N19/86
CPC分类号： H04N19/86 , H04N19/60
摘要： A method of de-blocking video data is disclosed. The video data encoding colour channels in a 4:2:2 format is received. The video data is encoded in a quad-tree. A plurality of transform units is generated for one of the colour channels, each of the transform units including at least one transform. A distance from an edge of one of the transform units to a boundary of a transform of the transform unit is determined. An edge flag for the transform unit is determined, the edge flag indicating the determined distance. De-blocking is applied to the transform units of the video data according to the determined edge flag.
摘要翻译：公开了一种解封阻视频数据的方法。接收4：2：2格式的视频数据编码色彩通道。视频数据以四叉树编码。为一个颜色通道生成多个变换单元，每个变换单元包括至少一个变换。确定从变换单元之一的边缘到变换单元的变换的边界的距离。确定变换单元的边缘标志，指示所确定的距离的边缘标志。根据确定的边缘标志，对视频数据的变换单元进行解块。

2. 发明公开

US20230164365A1 METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A TREE OF BLOCKS OF VIDEO SAMPLES 审中-公开
公开(公告)号：US20230164365A1
公开(公告)日：2023-05-25
申请号：US18157695
申请日：2023-01-20
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE
IPC分类号： H04N19/96 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/176 , H04N19/186
CPC分类号： H04N19/96 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/176 , H04N19/186
摘要： A method of decoding coding blocks of a coding tree unit in an image. The method comprises obtaining the coding tree unit in the image from a bitstream, the coding tree unit having chroma channels and a luma channel; and determining luma split options for the luma channel of the coding tree unit according to dimensions of a region of the coding tree unit. The method also comprises determining chroma split options for the chroma channels of the coding tree unit according to dimensions of a region of the coding tree unit, the chroma split options being different to the luma split options, the allowable chroma split options resulting in chroma intra predicted blocks with a minimum size of 16 samples; and decoding the coding blocks by determining flags from the bitstream to select one of the determined luma split options and one of the determined chroma split options.

3. 发明申请

US20180098068A1 METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING THE TRANSFORM UNITS OF A CODING UNIT 有权
公开(公告)号：US20180098068A1
公开(公告)日：2018-04-05
申请号：US15819585
申请日：2017-11-21
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE , VOLODYMYR KOLESNIKOV
IPC分类号： H04N19/122 , H04N19/186 , H04N19/60 , H04N19/119 , H04N19/136 , H04N19/70
CPC分类号： H04N19/122 , H04N19/119 , H04N19/136 , H04N19/186 , H04N19/60 , H04N19/70
摘要： Disclosed is method of decoding, from a video bitstream, a transform unit containing at least one chroma residual coefficient array associated with a single chroma channel. The method determines a size of the transform unit related to a hierarchical level of the transform unit in a corresponding coding unit, and identifies a maximum number of inverse transforms according to the determined size. The method decodes from the video bitstream the at least one chroma residual coefficient array using the identified maximum number of transforms, selects an inverse transform for the decoded chroma residual coefficient arrays, the inverse transform being selected from a predetermined set of inverse transforms, and applies the selected inverse transform to each of the chroma residual coefficient arrays to decode chroma residual samples for the chroma channel of the transform unit. A similar encoding method is also disclosed.

4. 发明申请

US20160227244A1 Method, apparatus and system for encoding and decoding video data 审中-公开
标题翻译：用于对视频数据进行编码和解码的方法，装置和系统
公开(公告)号：US20160227244A1
公开(公告)日：2016-08-04
申请号：US15021232
申请日：2014-09-12
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE
IPC分类号： H04N19/593 , H04N19/129 , H04N19/44 , H04N19/105 , H04N19/52 , H04N19/11 , H04N19/137 , H04N19/176 , H04N19/132 , H04N19/70
CPC分类号： H04N19/593 , H04N19/105 , H04N19/11 , H04N19/129 , H04N19/132 , H04N19/137 , H04N19/147 , H04N19/176 , H04N19/44 , H04N19/463 , H04N19/52 , H04N19/70
摘要： A method of decoding a coding unit from a video bitstream is disclosed. The coding unit references previously decoded samples. A previous block vector of a previous coding unit to said coding unit to be decoded is determined. The previous coding unit is configured to use intra-block copy. The method decodes, from the video bitstream, a block vector difference for the coding unit to be decoded. The block vector difference indicates a difference between the previous block vector and a block vector of the coding unit to be decoded. The block vector of the coding unit to be decoded is determined using the previous block vector and the block vector difference. The coding unit to be decoded is decoded based on sample values of a reference block selected using the determined block vector.
摘要翻译：公开了一种从视频比特流解码编码单元的方法。编码单元引用先前解码的样本。确定要解码的所述编码单元的先前编码单元的先前块矢量。先前的编码单元被配置为使用块内副本。该方法从视频比特流中解码要解码的编码单元的块向量差。块向量差表示前一个块矢量与要解码的编码单元的块矢量之间的差。使用先前的块向量和块向量差来确定要解码的编码单元的块向量。基于使用所确定的块向量选择的参考块的样本值对要解码的编码单元进行解码。

5. 发明公开

US20230164364A1 METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A TREE OF BLOCKS OF VIDEO SAMPLES 审中-公开
公开(公告)号：US20230164364A1
公开(公告)日：2023-05-25
申请号：US18157546
申请日：2023-01-20
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE
IPC分类号： H04N19/96 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/176 , H04N19/186
CPC分类号： H04N19/96 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/176 , H04N19/186
摘要： A method of decoding coding blocks of a coding tree unit in an image. The method comprises obtaining the coding tree unit in the image from a bitstream, the coding tree unit having chroma channels and a luma channel; and determining luma split options for the luma channel of the coding tree unit according to dimensions of a region of the coding tree unit. The method also comprises determining chroma split options for the chroma channels of the coding tree unit according to dimensions of a region of the coding tree unit, the chroma split options being different to the luma split options, the allowable chroma split options resulting in chroma intra predicted blocks with a minimum size of 16 samples; and decoding the coding blocks by determining flags from the bitstream to select one of the determined luma split options and one of the determined chroma split options.

6. 发明申请

US20220394311A1 METHOD APPARATUS AND SYSTEM FOR ENCODING AND DECODING A CODING TREE UNIT 有权
公开(公告)号：US20220394311A1
公开(公告)日：2022-12-08
申请号：US17771423
申请日：2020-11-04
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE
IPC分类号： H04N19/96 , H04N19/186 , H04N19/169 , H04N19/46
摘要： Decoding a coding unit of a coding tree from a coding tree unit, the coding unit having a luma colour channel and at least one chroma colour channel. Decoding a luma transform skip flag for a luma transform block; decoding at least one chroma transform skip flag, each chroma transform skip flag corresponding to one of at least one chroma transform block; determining a secondary transform index by decoding a secondary transform index if at least one of the luma transform skip flag and the at least one chroma transform skip flags indicates that a transform of the transform block is not to be skipped, and determining the secondary transform index to indicate that a secondary transform is not to be applied if all of the luma transform skip flag and the at least one chroma transform skip flags indicate transforms of the respective transform blocks are to be skipped.

7. 发明申请

US20170188000A1 METHOD, APPARATUS AND SYSTEM FOR DETERMINING A LUMA VALUE 审中-公开
公开(公告)号：US20170188000A1
公开(公告)日：2017-06-29
申请号：US15385463
申请日：2016-12-20
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE , VOLODYMYR KOLESNIKOV
IPC分类号： H04N9/77 , H04N9/64 , H04N7/01 , H04N9/12 , H04N1/60 , H04N11/00
CPC分类号： H04N9/77 , H04N1/6008 , H04N1/646 , H04N7/01 , H04N9/12 , H04N9/646 , H04N9/67 , H04N11/00 , H04N19/186 , H04N19/59 , H04N19/85
摘要： A method of determining a luma value from 4:4:4 RGB video data for encoding chroma downsampled 4:2:0 YCbCr video data into a bitstream. A location, in a colour space defined by linear luminance and non-linear 4:2:0 chroma values, is determined from the RGB video data. A region that contains the determined location is determined, the region being one region of a plurality of regions located in the colour space and having a plurality of associated coefficients. One or more of the coefficients associated with the determined region are selected, the selected coefficients being used to map the linear luminance and non-linear 4:2:0 chroma values to a luma value that compensates for a luminance shift introduced by chroma downsampling of the non-linear 4:2:0 chroma values. The method then determines the luma value for encoding into the bitstream according to a function of the selected coefficients and the determined location.

8. 发明申请

US20170155903A1 METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING VIDEO DATA ACCORDING TO LOCAL LUMINANCE INTENSITY 审中-公开
公开(公告)号：US20170155903A1
公开(公告)日：2017-06-01
申请号：US15360817
申请日：2016-11-23
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE , JONATHAN GAN , VOLODYMYR KOLESNIKOV
IPC分类号： H04N19/124 , H04N19/86 , H04N19/61 , H04N19/51 , H04N19/15 , H04N19/13 , H04N19/159
CPC分类号： H04N19/124 , H04N19/13 , H04N19/136 , H04N19/15 , H04N19/154 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/51 , H04N19/61 , H04N19/86
摘要： A method of encoding a portion of a video frame into a video bitstream, in which the portion of the video frame contains samples, take account the samples representing luminance levels according to an EOTF. The method determines a luminance of the portion of the video frame, and a desired (environment) luminance step size. The desired luminance step size represents a just noticeable difference (JND) determined according to the determined luminance and a predetermined ambient luminance, the desired luminance step size being greater than a luminance (transfer function) step size from the EOTF. The method then determines a quantisation parameter from the desired luminance step size and the luminance step size from the EOTF, the quantisation parameter being used for encoding the portion of the video frame, and then encodes encoding the portion of the video frame into the video bitstream according to the determined quantisation parameter.

9. 发明申请

US20150334405A1 METHOD, APPARATUS AND SYSTEM FOR COPYING A BLOCK OF VIDEO SAMPLES 审中-公开
标题翻译：用于复制视频样本块的方法，装置和系统
公开(公告)号：US20150334405A1
公开(公告)日：2015-11-19
申请号：US14711421
申请日：2015-05-13
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE , VOLODYMYR KOLESNIKOV
IPC分类号： H04N19/176 , H04N19/513 , H04N19/593
CPC分类号： H04N19/176 , H04N19/139 , H04N19/159 , H04N19/196 , H04N19/463 , H04N19/593
摘要： A method of copying a block of samples of a video bitstream, is disclosed. A plurality of adaptation parameters is read from a local memory store. Each adaptation parameter corresponds to a component of a multi-dimensional vector in the video bitstream. Each of the components of the vector is decoded from the video bitstream using the corresponding adaptation parameter. The block of samples is copied from the video bitstream. The spatial location of the block of samples is identified using the decoded components of the vector.
摘要翻译：公开了复制视频比特流的样本块的方法。从本地存储器存储器读取多个适配参数。每个适配参数对应于视频比特流中的多维向量的分量。使用相应的自适应参数，从视频比特流解码向量的每个分量。从视频比特流复制样本块。使用向量的解码分量来识别样本块的空间位置。

10. 发明公开

US20230156242A1 METHOD, APPARATUS AND SYSTEM FOR ENCODING AND DECODING A TREE OF BLOCKS OF VIDEO SAMPLES 审中-公开
公开(公告)号：US20230156242A1
公开(公告)日：2023-05-18
申请号：US18157519
申请日：2023-01-20
申请人： CANON KABUSHIKI KAISHA
发明人： CHRISTOPHER JAMES ROSEWARNE
IPC分类号： H04N19/96 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/176 , H04N19/186
CPC分类号： H04N19/96 , H04N19/117 , H04N19/119 , H04N19/122 , H04N19/132 , H04N19/176 , H04N19/186
摘要： A method of decoding coding blocks of a coding tree unit in an image. The method comprises obtaining the coding tree unit in the image from a bitstream, the coding tree unit having chroma channels and a luma channel; and determining luma split options for the luma channel of the coding tree unit according to dimensions of a region of the coding tree unit. The method also comprises determining chroma split options for the chroma channels of the coding tree unit according to dimensions of a region of the coding tree unit, the chroma split options being different to the luma split options, the allowable chroma split options resulting in chroma intra predicted blocks with a minimum size of 16 samples; and decoding the coding blocks by determining flags from the bitstream to select one of the determined luma split options and one of the determined chroma split options.

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