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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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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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Patent Agency Ranking
公开(公告)号：US20220086447A1
公开(公告)日：2022-03-17
申请号：US17532491
申请日：2021-11-22
Inventor： Jizheng XU , Weijia ZHU , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/186 , H04N19/176
Abstract: Combined intra and intra-block copy prediction for video coding is disclosed. A video processing method includes generating, for a conversion between a block of a video and a bitstream representation of the block, prediction for the block with a combined method which uses intra block copy (IBC) prediction and intra prediction in combination; and performing the conversion based on the prediction.
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公开(公告)号：US20220078452A1
公开(公告)日：2022-03-10
申请号：US17529607
申请日：2021-11-18
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/176 , H04N19/107 , H04N19/583 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/105 , H04N19/117 , H04N19/119
Abstract: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.
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公开(公告)号：US20220070485A1
公开(公告)日：2022-03-03
申请号：US17523286
申请日：2021-11-10
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/51 , H04N19/517
Abstract: A method for video processing is provided to include: determining a motion vector precision of one or more motion vectors related to a current video block of a video; selecting, based on the motion vector precision, a motion vector range; and performing, based on the motion vector range, a conversion between the current video block and a bitstream representation of the video.
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公开(公告)号：US20220070459A1
公开(公告)日：2022-03-03
申请号：US17522347
申请日：2021-11-09
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/122 , H04N19/105 , H04N19/157 , H04N19/192 , H04N19/70 , H04N19/176
Abstract: A method of visual processing includes determining, during a conversion between a block of a video and a bitstream representation of the video, whether there is a switch from a first residual coding technique to a second residual coding technique based on a number of context coded bins per unit used in the first residual coding technique. The unit is included in the block, and coefficients of the unit are coded in the bitstream representation in multiple passes. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220060745A1
公开(公告)日：2022-02-24
申请号：US17453135
申请日：2021-11-01
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/59 , H04N19/176 , H04N19/159 , H04N19/186 , H04N19/40 , H04N19/105 , H04N19/132 , H04N19/70
Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a first determination whether a luma video block of a video is coded using a matrix based intra prediction (MIP) mode; performing a second determination that the luma video block is applicable for determining a chroma intra mode for a current chroma video block of the video; performing, based on the first determination and the second determination, a third determination about the chroma intra mode to be used for the current chroma video block; and performing, based on the third determination, a conversion between the current chroma video block and a bitstream representation of the current chroma video block.
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