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1. 发明公开

US20240364877A1 ADAPTIVE LOOP FILTER 审中-公开
公开(公告)号：US20240364877A1
公开(公告)日：2024-10-31
申请号：US18652687
申请日：2024-05-01
申请人： CANON KABUSHIKI KAISHA
发明人： Jonathan TAQUET , Christophe GISQUET , Guillaume LAROCHE , Patrice ONNO
IPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
CPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
摘要： A method of controlling an Adaptive Loop Filter comprises obtaining for a slice containing one or more coding tree blocks, data indicating a number of available alternative chroma filters, obtaining for a coding tree block in the slice, an alternative filter index identifying one of the available alternative chroma filters, and selecting the alternative chroma filter identified by the index to filter chroma image data in the coding tree block.

2. 发明公开

US20240348779A1 ADAPTIVE LOOP FILTER 审中-公开
公开(公告)号：US20240348779A1
公开(公告)日：2024-10-17
申请号：US18652710
申请日：2024-05-01
申请人： CANON KABUSHIKI KAISHA
发明人： Jonathan TAQUET , Christophe GISQUET , Guillaume LAROCHE , Patrice ONNO
IPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
CPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
摘要： A method of controlling an Adaptive Loop Filter comprises obtaining for a slice containing one or more coding tree blocks, data indicating a number of available alternative chroma filters, obtaining for a coding tree block in the slice, an alternative filter index identifying one of the available alternative chroma filters, and selecting the alternative chroma filter identified by the index to filter chroma image data in the coding tree block.

3. 发明公开

US20230370594A1 ADAPTIVE LOOP FILTERING (ALF) WITH NON-LINEAR CLIPPING 审中-公开
公开(公告)号：US20230370594A1
公开(公告)日：2023-11-16
申请号：US18355933
申请日：2023-07-20
申请人： CANON KABUSHIKI KAISHA
发明人： Jonathan TAQUET , Christophe GISQUET , Guillaume LAROCHE , Patrice ONNO
IPC分类号： H04N19/117 , H04N19/86 , H04N19/132 , H04N19/176 , H04N19/136
CPC分类号： H04N19/117 , H04N19/86 , H04N19/132 , H04N19/176 , H04N19/136
摘要： A method of controlling an Adaptive Loop Filter for one or more image portions of an image, the method comprising controlling filtering on a first sample of an image portion based on one or more neighbouring sample value(s) of the first sample value, wherein the controlling uses a nonlinear function which has one or more variables based on one or more of the neighbouring sample value(s).

4. 发明申请

US20230121486A1 VIDEO CODING AND DECODING 有权
公开(公告)号：US20230121486A1
公开(公告)日：2023-04-20
申请号：US17914096
申请日：2021-03-22
申请人： CANON KABUSHIKI KAISHA
发明人： Naël OUEDRAOGO , Patrice ONNO , Guillaume LAROCHE
IPC分类号： H04N19/70 , H04N19/426 , H04N19/169 , H04N19/172
摘要： A sequence of images is encoded in a bitstream as a series of picture units PU-01˜03. Each picture unit corresponds to one encoded image and includes one or more network abstraction layer (NAL) units NAL-01˜23. The NAL units may be video coding layer (VCL) NAL units which each contain encoded image data or adaptation parameter set NAL units which each contain an adaptation parameter set (APS) having parameters for performing one or more types of processing operation on the image data contained in one or more VCL NAL units. The APS NAL units may be prefix APS NAL units P-APS or suffix APS NAL units S-APS. An additional constraint is applied to the bitstream prohibiting inclusion, in a picture unit, of a prefix APS NAL unit after the first NAL unit of the picture unit concerned. This can avoid more than one APS applying to slices belonging to the same picture unit, and hence reduce the size of an APS buffer. Alternatively, or in addition, it is permitted to include, in the same picture unit, of a prefix APS NAL unit and a suffix APS NAL unit having the same APS type and the same APS identifier but different contents. This can reduce rewriting operations when performing random access decoding at a specific timing in the coded video sequence.

5. 发明申请

US20220360804A1 VIDEO CODING AND DECODING 有权
公开(公告)号：US20220360804A1
公开(公告)日：2022-11-10
申请号：US17752677
申请日：2022-05-24
申请人： CANON KABUSHIKI KAISHA
发明人： Guillaume LAROCHE , Christophe GISQUET , Patrice ONNO , Jonathan TAQUET
IPC分类号： H04N19/46 , H04N19/105 , H04N19/13 , H04N19/176
摘要： The invention relates to signalling affine mode in an encoded video stream; in particular determining a list of merge candidates corresponding to blocks neighbouring a current block; and signalling affine mode for said current block; wherein signalling said affine mode comprises decoding a context encoded flag from the data stream, and wherein the context variable for said flag is determined based on whether or not said neighbouring blocks use affine mode. Related encoding and decoding methods and devices are also disclosed.

6. 发明申请

US20220094989A1 METHOD AND APPARATUS FOR DEBLOCKING FILTERING A BLOCK OF PIXELS 有权
公开(公告)号：US20220094989A1
公开(公告)日：2022-03-24
申请号：US17541058
申请日：2021-12-02
申请人： CANON KABUSHIKI KAISHA
发明人： Christophe GISQUET , Jonathan TAQUET , Patrice ONNO , Guillaume LAROCHE
IPC分类号： H04N19/82 , H04N19/117 , H04N19/14 , H04N19/176 , H04N19/182 , H04N19/86
摘要： A method of filtering a block of pixels in an image, comprising obtaining a first clipping control parameter (tc) value based on a quantization parameter of the block; comparing a first value of a first pixel located on one side of an edge in said block and a second value of a second pixel located on the other side of the edge in said block with a predetermined threshold derived from the first clipping control parameter value; and determining whether to apply a strong filtering to the first pixel based on the result of the comparison, wherein: the strong filtering comprises filtering the first pixel value so that the filtered first pixel value differs from the first pixel value by no more than a range value based on the clipping control parameter (tc), the ration between two range values corresponding to successive values of bitdepths being strictly lower than 2.

7. 发明申请

US20210352275A1 VIDEO CODING AND DECODING 有权
公开(公告)号：US20210352275A1
公开(公告)日：2021-11-11
申请号：US17283163
申请日：2019-10-18
申请人： CANON KABUSHIKI KAISHA
发明人： Guillaume LAROCHE , Christophe GISQUET , Patrice ONNO , Jonathan TAQUET
IPC分类号： H04N19/105 , H04N19/13 , H04N19/70 , H04N19/176
摘要： A method of encoding a motion information predictor index, comprising: generating a list of motion information predictor candidates; when an Affine Merge mode is used, selecting one of the motion information predictor candidates in the list as an Affine Merge mode predictor; when a non-Affine Merge mode is used, selecting one of the motion information predictor candidates in the list as a non-Affine Merge mode predictor; and generating a motion information predictor index for the selected motion information predictor candidate using CABAC coding, one or more bits of the motion information predictor index being bypass CABAC coded.

8. 发明申请

US20140301487A1 METHOD AND DEVICE FOR CLASSIFYING SAMPLES OF AN IMAGE 有权
标题翻译：用于分类图像样本的方法和装置
公开(公告)号：US20140301487A1
公开(公告)日：2014-10-09
申请号：US14245867
申请日：2014-04-04
申请人： CANON KABUSHIKI KAISHA
发明人： Guillaume LAROCHE , Patrice ONNO , Edouard FRANÇOIS , Christophe GISQUET
IPC分类号： H04N19/86 , H04N19/117 , H04N19/34 , H04N19/82
CPC分类号： H04N19/14 , H04N19/117 , H04N19/176 , H04N19/34 , H04N19/82 , H04N19/86
摘要： A method and a device for classifying samples of an image, each sample having a respective sample value the method comprising repartition of each of the samples into a plurality of index classes, wherein the index class allocated to each sample is determined in dependence upon the sample value of the said sample with respect to the sample values of first neighbouring samples of said sample according to a given direction and further in respect to the sample values of the first neighbouring samples with respect to the sample values of samples neighbouring the first neighbouring samples according to the said given direction. Processing each sample according to the respective allocated index class.
摘要翻译：一种用于对图像的样本进行分类的方法和装置，每个样本具有相应的样本值，所述方法包括将每个样本重新划分为多个索引类别，其中分配给每个样本的索引类别根据样本来确定所述样本相对于所述样本的第一相邻样本的样本值根据给定方向的值，并且关于相对于与第一相邻样本相邻的样本的采样值相对于第一相邻样本的样本值，到所说的方向。根据各自分配的索引类处理每个样本。

9. 发明公开

US20240372999A1 ADAPTIVE LOOP FILTER 审中-公开
公开(公告)号：US20240372999A1
公开(公告)日：2024-11-07
申请号：US18652716
申请日：2024-05-01
申请人： CANON KABUSHIKI KAISHA
发明人： Jonathan TAQUET , Christophe GISQUET , Guillaume LAROCHE , Patrice ONNO
IPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
CPC分类号： H04N19/117 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
摘要： A method of controlling an Adaptive Loop Filter comprises obtaining for a slice containing one or more coding tree blocks, data indicating a number of available alternative chroma filters, obtaining for a coding tree block in the slice, an alternative filter index identifying one of the available alternative chroma filters, and selecting the alternative chroma filter identified by the index to filter chroma image data in the coding tree block.

10. 发明公开

US20240305825A1 HIGH LEVEL SYNTAX FOR VIDEO CODING AND DECODING 审中-公开
公开(公告)号：US20240305825A1
公开(公告)日：2024-09-12
申请号：US18654626
申请日：2024-05-03
申请人： CANON KABUSHIKI KAISHA
发明人： Guillaume LAROCHE , Naël OUEDRAOGO , Patrice ONNO
IPC分类号： H04N19/70 , H04N19/117 , H04N19/157 , H04N19/174 , H04N19/30
CPC分类号： H04N19/70 , H04N19/117 , H04N19/157 , H04N19/174 , H04N19/30
摘要： A method of decoding video data from a bitstream, the bitstream comprising video data corresponding to one or more slices. The bitstream comprises a picture header comprising syntax elements to be used when decoding one or more slices, and a slice header comprising syntax elements to be used when decoding a slice. In the picture header at least one syntax element indicating whether a decoding tool may be used in the picture. When the decoding tool is used in the picture, at least one APS ID related syntax element is parsed for the decoding tool in the picture header. The decoding also comprises parsing, in a slice header, at least one syntax element indicating whether the decoding tool is to be used or not for that slice prior to syntax elements relating to other decoding tools. A bitstream is decoded using said syntax elements.

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