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公开(公告)号：US20220094914A1
公开(公告)日：2022-03-24
申请号：US17540068
申请日：2021-12-01
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/159 , H04N19/119 , H04N19/137
Abstract: A visual media processing method includes determining that a first video block of a visual media data uses a geometric partitioning mode (GPM) and a second video block of the visual media data uses a non-GPM mode; constructing, based on a unified pruning process, a first merge list for the first video block and a second merge list for the second video block, wherein the first merge list and the second merge list include merge candidates, and the pruning process includes adding a new merge candidate to the merge list based on comparing motion information of the new merge candidate with motion information of at least one merge candidate in the merge list, wherein the GPM includes splitting the first video block into multiple prediction partitions to apply motion prediction separately, and at least one partition having a non-rectangular shape.
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公开(公告)号：US20220086481A1
公开(公告)日：2022-03-17
申请号：US17534968
申请日：2021-11-24
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/52 , H04N19/105 , H04N19/119 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/577 , H04N19/593
Abstract: Difference calculation based on partial position is described. In a representative aspect, a method of video processing comprising: calculating, during a conversion between a current block of video and a bitstream representation of the current block, differences between two reference blocks associated with the current block or differences between two reference sub-blocks associated with a sub-block within the current block based on representative positions of the reference blocks or representative positions of the reference sub-blocks; and performing the conversion based on the differences.
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公开(公告)号：US20220086458A1
公开(公告)日：2022-03-17
申请号：US17346568
申请日：2021-06-14
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/159 , H04N19/172 , H04N19/176 , H04N19/96 , H04N19/117 , H04N19/132 , H04N19/186 , H04N19/105 , H04N19/513
Abstract: Devices, systems and methods for digital video coding, which includes inter prediction with refinement, are described. An exemplary method of video processing includes determining to use, for a conversion between a current block of a video and a bitstream representation of the video, a first linear optimization model for the conversion using a first coding mode, the first linear optimization model being derived from a second linear optimization model that is used for the conversion using a second coding mode, and performing, based on the determining, the conversion. Another exemplary method of video processing includes determining to use, for a conversion between a current block of a video and a bitstream representation of the video, a gradient value computation algorithm for a bi-directional optical flow tool, and performing, based on the determining, the conversion.
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公开(公告)号：US20220086433A1
公开(公告)日：2022-03-17
申请号：US17538916
申请日：2021-11-30
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/139 , H04N19/119 , H04N19/196 , H04N19/176 , H04N19/58
Abstract: A visual media processing method includes determining that a first video block of a visual media data uses a geometric partitioning mode (GPM) and a second video block of the visual media data uses a non-GPM mode; constructing, based on a unified pruning process, a first merge list for the first video block and a second merge list for the second video block, wherein the first merge list and the second merge list comprise merge candidates, and the pruning process includes adding a new merge candidate to the merge list based on comparing motion information of the new merge candidate with motion information of at least one merge candidate in the merge list, wherein the GPM comprises splitting the first video block into multiple prediction partitions to apply motion prediction separately, and at least one partition having a non-rectangular shape.
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公开(公告)号：US20220078476A1
公开(公告)日：2022-03-10
申请号：US17520570
申请日：2021-11-05
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/52 , H04N19/119 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/196 , H04N19/40 , H04N19/593 , H04N19/157
Abstract: The disclosure relates to improvement on HMVP table. A method for processing video includes: maintaining, during a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, a table storing history based motion vector prediction (HMVP) candidates which include motion information based on previously coded blocks; performing the conversion of the current block at least based on the table, wherein the table is of a HMVP table size which depends on one or more motion candidate lists, and the HMVP table size is a maximum number of candidates stored in the table.
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Patent Agency Ranking
公开(公告)号：US20220070489A1
公开(公告)日：2022-03-03
申请号：US17525745
申请日：2021-11-12
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/52 , H04N19/176
Abstract: Devices, systems and methods for unified rounding in sub-block based prediction are described. In a representative aspect, a method of video processing includes generating, for a processing of a current block of video, a pairwise merge candidate based on a pair of motion candidates, and performing, based on the pairwise merge candidate, a conversion between the current block and a bitstream representation of the video. In another representative aspect, a method of video processing includes generating, for a current block of video coded using a geometry partition mode, a uni-prediction motion candidate based on a scaled motion vector and a List0 motion vector, and performing, based on the uni-prediction motion candidate, a conversion between the current block and a bitstream representation of the video.
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公开(公告)号：US20220070483A1
公开(公告)日：2022-03-03
申请号：US17356175
申请日：2021-06-23
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG , Na ZHANG
IPC: H04N19/46 , H04N19/159 , H04N19/105 , H04N19/176
Abstract: The present application relates to signaling of combined intra-inter prediction. A method for processing video includes: coding, during a conversion between a current video block in a video data and a bitstream representation of the current video block, a combined inter-intra prediction (CIIP) flag for the current video block by a context model based coding without referring to a CIIP flag of one or more neighboring video blocks to the current video block, and performing, at least by applying the combined inter-intra prediction (CIIP) flag of the current video block, the conversion.
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公开(公告)号：US20220070455A1
公开(公告)日：2022-03-03
申请号：US17524477
申请日：2021-11-11
Inventor： Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/169 , H04N19/159 , H04N19/176
Abstract: In an exemplary aspect, a method for visual media processing includes determining whether a pair of adjacent blocks of visual media data are both intra block copy (IBC) coded; and selectively applying, based on the determination, a deblocking filter (DB) process by identifying a boundary at a vertical edge and/or a horizontal edge of the pair of adjacent blocks, calculating a boundary strength of a filter, deciding whether to turn on or off the filter, and selecting a strength of the filter in case the filter is turned on, wherein the boundary strength of the filter is dependent on a motion vector difference between motion vectors associated with the pair of adjacent blocks.
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公开(公告)号：US20220070454A1
公开(公告)日：2022-03-03
申请号：US17523131
申请日：2021-11-10
Inventor： Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: In an exemplary aspect, a method for visual media processing includes identifying a boundary at a vertical edge and/or a horizontal edge of two video blocks; calculating a boundary strength of a filter based on at least one of the two video blocks crossing a vertical edge or a horizontal edge is coded using a combined intra-inter prediction (CIIP) mode; deciding whether to turn on or off the filter; selecting a strength of the filter in case the filter is turned on; and performing, based on the selecting, a deblocking filter (DB) process to the video blocks.
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公开(公告)号：US20220060712A1
公开(公告)日：2022-02-24
申请号：US17519365
申请日：2021-11-04
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/196 , H04N19/172 , H04N19/70 , H04N19/159
Abstract: Devices, systems and methods for digital video coding, which includes reference picture resampling, are described. An example method for video processing includes performing a conversion between a video comprising one or more video segments comprising one or more video units and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule and comprises information related to an adaptive resolution conversion (ARC) process, wherein the format rule specifies the applicability of the ARC process to a video segment, wherein an indication that the one or more video units of the video segment are coded with different resolutions is included in the bitstream representation in a syntax structure that is different from a header syntax structure, a decoder parameter set, a video parameter set, a picture parameter set, a sequence parameter set, and an adaptation parameter set.
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