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公开(公告)号：US20210400299A1
公开(公告)日：2021-12-23
申请号：US17463838
申请日：2021-09-01
Inventor： Weijia ZHU , Hongbin LIU , Kai ZHANG , Li ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/105 , H04N19/46 , H04N19/176
Abstract: Motion Vector Management for Decoder Side Motion Vector Refinement is disclosed. A method of video processing including: determining, for a conversion between a first block of video and a bitstream representation of the first block of video, whether and/or how to apply decoder-side motion vector refinement (DMVR) based on a signaled information; and performing the conversion based on the determination.
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公开(公告)号：US20210400260A1
公开(公告)日：2021-12-23
申请号：US17466188
申请日：2021-09-03
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/167 , H04N19/186 , H04N19/159 , H04N19/132
Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, whether to derive maximum values and/or minimum values of a luma component and a chroma component that are used to derive parameters of a cross-component linear model (CCLM) based on availability of a left-neighboring block and an above-neighboring block of the current video block; and performing the conversion based on the determining.
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公开(公告)号：US20210385499A1
公开(公告)日：2021-12-09
申请号：US17400512
申请日：2021-08-12
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/70 , H04N19/61 , H04N19/186 , H04N19/176
Abstract: A video processing method is provided to comprise: performing a conversion between a current video block of a video and a coded representation of the current video block, wherein the coded representation conforms to a format rule specifying that a syntax element corresponding to side information of a secondary transform tool for the current video block is signaled in the coded representation before transform related information, wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization of the video block before applying an inverse primary transform.
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公开(公告)号：US20210385483A1
公开(公告)日：2021-12-09
申请号：US17405421
申请日：2021-08-18
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which includes deriving RMVF-based motion vector information, are described. An exemplary method for video processing includes deriving at least one motion model for a current video block, based on motion information of at least one non-adjacent spatial neighboring block or at least one temporal neighboring block of the current video block; deriving motion information for the current video block or at least one sub-block of the current video block based on the at least one motion model; and performing a conversion for the current video block based on the derived motion information.
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公开(公告)号：US20210385482A1
公开(公告)日：2021-12-09
申请号：US17405374
申请日：2021-08-18
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176
Abstract: Devices, systems and methods for sample refinement and filtering method for video coding are described. In an exemplary aspect, a method for video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the video, a refinement value for a prediction sample in the block by applying a clipping operation to refinement value. The refinement value is derived based on a gradient value of an optical flow coding process. An output of the clipping operation is within a range. The method also includes refining the prediction sample based on the refinement value and performing the conversion based on the refined prediction sample.
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Patent Agency Ranking
公开(公告)号：US20210377531A1
公开(公告)日：2021-12-02
申请号：US17401479
申请日：2021-08-13
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/96 , H04N19/46 , H04N19/176
Abstract: Transform parameter derivation based on block partition is described. In an exemplary aspect, a method for video processing includes determining, for a conversion between a first block of video and a bitstream representation of the first block of video, whether a use of non-power-of-two partition trees (NPT-T) is enabled or disabled, wherein the NPT-T includes splitting the first block to multiple smaller sized child blocks of the first block, and at least one child block's width and/or height have a dimension that is a non-power-of-two integer; and performing the conversion based on the NPT-T in response to the determination that the NPT-T is enabled.
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公开(公告)号：US20210377529A1
公开(公告)日：2021-12-02
申请号：US17401447
申请日：2021-08-13
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/96 , H04N19/176
Abstract: Restrictions of usage of non-power-two-partition tree in video compression is described. In an exemplary aspect, a method for video processing includes determining, for a conversion between a video and a bitstream representation of the video, whether non-power-of-two partition trees (NPT-T) partition is enabled or disabled, wherein the NPT-T partition include splitting a first block of the video into multiple smaller sized child blocks of the first block, and width (Wi) and/or height (Hi) of at least one child block is a non-power-of-two integer; determining restrictions associated with usage of the NPT-T partition in response to the determination that the NPT-T partition is allowed; and performing the conversion based on the determinations.
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公开(公告)号：US20210368187A1
公开(公告)日：2021-11-25
申请号：US17398887
申请日：2021-08-10
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/436 , H04N19/176 , H04N19/159 , H04N19/137 , H04N19/51
Abstract: A method for processing a video includes maintaining one or more tables, wherein each table includes motion candidates derived from previously processed video blocks that are processed prior to a first video block of a video; deriving motion information for the first video block; applying refinement to the motion information when at least one decoder side motion vector derivation (DMVD) technologies is enabled; performing a conversion between a bitstream representation of the first video block and the first video block using the refined motion information; and determining, whether to use the refined motion information or un-refined motion information for updating one or more tables.
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公开(公告)号：US20210360278A1
公开(公告)日：2021-11-18
申请号：US17369132
申请日：2021-07-07
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/513 , H04N19/94 , H04N19/176
Abstract: Devices, systems and methods for processing video are described. In a representative aspect, a video processing method is provided to include: maintaining tables, wherein each table includes a set of motion candidates and each motion candidate is associated with corresponding motion information; performing a conversion between a first video block and a bitstream representation of a video including the first video block based on the tables; and updating, after performing of the conversion, zero or more tables, based on an update rule.
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公开(公告)号：US20210360256A1
公开(公告)日：2021-11-18
申请号：US17389200
申请日：2021-07-29
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/139 , H04N19/51 , H04N19/176
Abstract: Interaction between MV precisions and MV difference coding is described. In an exemplary aspect, a method for video processing includes determining, for a conversion between a first block of video and a bitstream representation of the first block, whether a symmetric motion vector difference (SMVD) mode for the first block is enabled or disabled and/or how to apply the SMVD mode for the first block, based on at least one of motion information, a motion vector difference (MVD) precision and a motion vector (MV) precision of the first block; and performing the conversion based on the determining.
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