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公开(公告)号：US20220159246A1
公开(公告)日：2022-05-19
申请号：US17665220
申请日：2022-02-04
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video comprising a picture that includes multiple sub-pictures and a coded representation of the video using a coding mode according to a rule. The rule specifies that certain stored information about a previous sub-picture is reset prior to processing each next sub-picture of the multiple sub-pictures.
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公开(公告)号：US20220150502A1
公开(公告)日：2022-05-12
申请号：US17585741
申请日：2022-01-27
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/46
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video unit of a video and a coded representation of the video, a default intra prediction mode for the video unit coded using a certain intra prediction mode such that a prediction block of the current video block is generated without extrapolating neighboring pixels of the current video block along a direction; and performing the conversion based on the determining.
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公开(公告)号：US20220150476A1
公开(公告)日：2022-05-12
申请号：US17582351
申请日：2022-01-24
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/169 , H04N19/176
Abstract: A method for video processing is described. The method comprises: making a decision, for a conversion between a current video block of a video picture of a video and a coded representation of the video, regarding a size of a reference region of the video picture from which reference samples are used for predicting the current video block, based on a size of a virtual pipeline data unit (VPDU), a size of a coding tree block (CTB), or a size of a coding tree unit (CTU); and performing the conversion based on the decision.
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公开(公告)号：US20220124327A1
公开(公告)日：2022-04-21
申请号：US17646048
申请日：2021-12-27
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/117 , H04N19/119 , H04N19/132 , H04N19/174 , H04N19/176 , H04N19/70 , H04N19/184 , H04N19/82
Abstract: Devices, systems and methods for temporal prediction of parameters in non-linear adaptive loop filtering are described. In an exemplary aspect, a method for visual media processing includes configuring, for a current video block, one or more parameters of a clipping operation that is part of a non-linear filtering operation; and performing, based on the one or more parameters, a conversion between the current video block and a bitstream representation of the current video block, wherein the one or more parameters is coded in accordance with a rule.
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公开(公告)号：US20220109885A1
公开(公告)日：2022-04-07
申请号：US17546621
申请日：2021-12-09
Inventor： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU
IPC: H04N19/70 , H04N19/186 , H04N19/176
Abstract: A method for visual media processing includes processing a bitstream representation for a conversion between a current video block in a video region of a visual media data and the bitstream representation. The bitstream representation is based on a rule that specifies that one or more syntax elements used in a luma-dependent chroma residual scaling step are selectively included in the bitstream representation. The luma-dependent chroma residual scaling step includes scaling chroma samples based on neighboring reconstructed luma samples during the conversion. The one or more syntax elements are usable to derive a chroma residual scaling factor used for the scaling.
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Patent Agency Ranking
公开(公告)号：US20220109852A1
公开(公告)日：2022-04-07
申请号：US17551392
申请日：2021-12-15
Inventor： Jizheng XU , Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU
IPC: H04N19/139 , H04N19/176 , H04N19/159 , H04N19/96 , H04N19/593
Abstract: Interaction between screen content coding tools and motion information is disclosed. A method of video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the block, at least one of motion information associated with the block which is coded with intra block copy (IBC) mode; and performing the conversion based on the modified motion information.
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公开(公告)号：US20220103827A1
公开(公告)日：2022-03-31
申请号：US17506578
申请日：2021-10-20
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/137 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: Devices, systems and methods for video processing are described. In one aspect, a video processing method is provided to include determining, for a conversion between a current video block of a video and a coded representation of the video, that a motion information of the current video block is refined using an optical flow-based method in which at least one motion vector offset is derived for a region within the current video block; clipping the at least one motion vector offset to a range [−N,M], wherein N and M are integers based on a rule; and performing the conversion based on at least one clipped motion vector offset.
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公开(公告)号：US20220103817A1
公开(公告)日：2022-03-31
申请号：US17548187
申请日：2021-12-10
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/117 , H04N19/176 , H04N19/96 , H04N19/82
Abstract: A method of video processing includes determining, for a conversion between a picture of a video that includes one or more blocks and a bitstream representation of the video, whether a virtual boundary is enabled for a block within the picture for a filtering process based on a rule related to a relationship between a bottom boundary of the block and the picture. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220103815A1
公开(公告)日：2022-03-31
申请号：US17361837
申请日：2021-06-29
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/117 , H04N19/176 , H04N19/186 , H04N19/82 , H04N19/174 , H04N19/31 , H04N19/70
Abstract: Devices, systems and methods for digital video coding, which includes in-loop reshaping for video coding, are described. An exemplary method for video processing includes performing a conversion between a video comprising one or more video data units and a bitstream representation of the video, the bitstream representation conforming to a format rule that specifies an inclusion of side information indicative of default parameters for a coding mode that is applicable to a video block of the one or more video data units for which the coding mode is enabled, and the side information providing parameters for constructing the video block based on a representation of the video block in an original domain and a reshaped domain and/or a luma-dependent scaling of a chroma residue of a chroma video block.
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公开(公告)号：US20220094930A1
公开(公告)日：2022-03-24
申请号：US17457473
申请日：2021-12-03
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yang WANG , Yue WANG
IPC: H04N19/122 , H04N19/176 , H04N19/18 , H04N19/625
Abstract: Devices, systems and methods for digital video coding, which includes using multiple transforms, are described. In a representative aspect, a method for video processing includes selecting, as part of a multiple transform selection (MTS) process, a common transform as both a vertical transform and a horizontal transform, and applying, as part of performing a conversion between a current block of a video and a bitstream representation of the video, the vertical transform and the horizontal transform to the current block.
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