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公开(公告)号：US20220191490A1
公开(公告)日：2022-06-16
申请号：US17682656
申请日：2022-02-28
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Na ZHANG , Yue WANG
IPC: H04N19/119 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
Abstract: Methods, devices, and systems related to video processing are disclosed. In one example aspect, a method of video processing includes performing a conversion between a block of a current picture of a video and a coded representation of the video using an intra-subblock partitioning (ISP) mode. A prediction is determined for each sub-partition using an intra-prediction process based on samples in the current picture using the ISP mode. The block is partitioned into multiple sub-partitions including a first sub-partitions having a same top-left corner position as a top-left corner position of the block.
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公开(公告)号：US20220166985A1
公开(公告)日：2022-05-26
申请号：US17665275
申请日：2022-02-04
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/157 , H04N19/172 , H04N19/119 , H04N19/30 , H04N19/70 , H04N19/167 , H04N19/103
Abstract: A method of video processing includes performing a conversion between a video unit of a video and a coded representation of the video using at least a video picture. Only one of a sub-picture coding mode or a resolution-changing coding mode is enabled for the video unit. The sub-picture coding mode is a mode in which the video picture is divided into multiple sub-pictures, and the resolution-changing coding mode is a mode in which a resolution of the video picture is adjusted during the conversion.
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公开(公告)号：US20220166971A1
公开(公告)日：2022-05-26
申请号：US17665242
申请日：2022-02-04
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/70
Abstract: A method of video processing includes determining, for a conversion between a current block of a first picture of a video and a bitstream representation of the video, a motion candidate based on motion information from a second picture according to a rule. The rule specifies that a position from which the motion information is accessed is constrained to be within a specific subpicture of the second picture. The method also includes performing the conversion based on the determining.
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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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Patent Agency Ranking
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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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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