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公开(公告)号：US20220030220A1
公开(公告)日：2022-01-27
申请号：US17479192
申请日：2021-09-20
Inventor： Zhipin DENG , Li ZHANG , Hongbin Liu , Kai Zhang , Jizheng XU
IPC: H04N19/105 , H04N19/96 , H04N19/196 , H04N19/146 , H04N19/176
Abstract: A method for visual media processing, including performing a conversion between a current chroma chroma block of visual media data and a bitstream representation of the current chroma chroma block, wherein, during the conversion, a chroma residual of the current chroma chroma block is scaled based on a scaling coefficient, wherein the scaling coefficient is derived at least based on luma samples located in predefined positions.
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公开(公告)号：US20220014734A1
公开(公告)日：2022-01-13
申请号：US17484636
申请日：2021-09-24
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/132 , H04N19/117 , H04N19/80 , H04N19/176
Abstract: A method of video processing is provided to include: maintaining, prior to a conversion between a current video block of a video region and a coded representation of the video, at least one history-based motion vector prediction (HMVP) table, wherein the HMVP table includes one or more entries corresponding to motion information of one or more previously processed blocks; and performing the conversion using the at least one HMVP table; and wherein the motion information of each entry is configured to include interpolation filter information for the one or more previously processed blocks, wherein the interpolation filter information indicates interpolation filters used for interpolating prediction blocks of the one or more previously processed blocks.
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公开(公告)号：US20220007057A1
公开(公告)日：2022-01-06
申请号：US17473440
申请日：2021-09-13
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Weijia ZHU , Yue WANG
IPC: H04N19/60 , H04N19/119 , H04N19/14 , H04N19/176
Abstract: A method for video processing includes applying a sub-block residual coding scheme to a current video block, wherein the residual of the current video block is split into a plurality of sub-blocks each having a size of M*N, determining at least one sub-block with non-zero coefficients based on characteristic associated with each of the plurality of sub-blocks; coding the residue of the current video block based on the derived at least one sub-block with non-zero coefficients.
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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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Patent Agency Ranking
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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公开(公告)号：US20210385459A1
公开(公告)日：2021-12-09
申请号：US17411296
申请日：2021-08-25
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Hsiao Chiang CHUANG
IPC: H04N19/132 , H04N19/159 , H04N19/70 , H04N19/186 , H04N19/176
Abstract: Video coding and decoding methods are described. An example method includes determining, based on an applicability rule, that a differential coding mode is applicable to a conversion between a chroma video block of a video and a bitstream representation of the chroma video block, and performing, based on the determining, the conversion between the chroma video block and the bitstream representation of the chroma video block using the differential coding mode, where the chroma video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the chroma video block and a prediction of the quantized residual in the differential coding mode, where the intra prediction is performed in a first direction and the prediction of the quantized residual is performed in a second direction, and where the difference is represented using a differential pulse coding modulation (DPCM) representation.
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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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