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公开(公告)号：US20220239950A1
公开(公告)日：2022-07-28
申请号：US17713104
申请日：2022-04-04
发明人： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC分类号： H04N19/70 , H04N19/174 , H04N19/30 , H04N19/186 , H04N19/172
摘要： An example method of video processing includes performing a conversion between a video and a bitstream representation of the video. The bitstream representation conforms to a format rule that specifies, in case a first syntax element is included in a first video unit in the bitstream representation, whether a corresponding second syntax element in a second video unit is included in the bitstream representation.
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公开(公告)号：US20220217341A1
公开(公告)日：2022-07-07
申请号：US17698114
申请日：2022-03-18
发明人： Jizheng XU , Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/117 , H04N19/12 , H04N19/167 , H04N19/172 , H04N19/105
摘要： Adaptive resolution change and scalable coding for screen contents are described. One example is a method for video processing, comprising: determining, for a conversion between a picture or a video and a bitstream representation of the picture or the video, whether the picture or the video is native resolution based on an indication included in the bitstream representation; and performing the conversion based on the determination.
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公开(公告)号：US20220217340A1
公开(公告)日：2022-07-07
申请号：US17696560
申请日：2022-03-16
发明人： Li ZHANG , Hongbin LIU , Kai ZHANG , Yue WANG
IPC分类号： H04N19/117 , H04N19/70 , H04N19/174
摘要： Methods, systems and devices for signaling the usage of adaptive loop filtering in image and video coding are described. An example method of video processing includes determining, for a conversion between a current region of a video and a bitstream representation of the video, whether a luma adaptive loop filter is used during the conversion and whether luma adaptive loop filter coefficients are included in the bitstream representation, wherein a single syntax element in the bitstream representation is indicative of use of the luma adaptive loop filter and signaling of the luma adaptive loop filter coefficients, and performing, based on the determining, the conversion.
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公开(公告)号：US20220210460A1
公开(公告)日：2022-06-30
申请号：US17682751
申请日：2022-02-28
发明人： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU , Yue WANG
IPC分类号： H04N19/51 , H04N19/176 , H04N19/186 , H04N19/119 , H04N19/137 , H04N19/105 , H04N19/132 , H04N19/70
摘要： A method of video processing is described. The method includes determining chroma weights used for determining a chroma prediction block of a chroma block of a current block of a video by blending predictions of the chroma block according to a rule, and performing a conversion between the current block and a coded representation of the video according to the determining, wherein the rule specifies that the chroma weights are determined from luma weights of a collocated luma block of the current block; wherein the current block is coded with a geometric partitioning mode.
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公开(公告)号：US20220191492A1
公开(公告)日：2022-06-16
申请号：US17689320
申请日：2022-03-08
发明人： Jizheng XU , Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yue WANG
IPC分类号： H04N19/122 , H04N19/176 , H04N19/30 , H04N19/18 , H04N19/60 , H04N19/46 , H04N19/132 , H04N19/172 , H04N19/186 , H04N19/103
摘要： Methods, systems, and devices for coefficient scaling for high-precision image and video coding are described. A example method of video processing includes performing a conversion between a current block of a video and a bitstream representation of the video according to a rule, wherein the rule specifies that the conversion includes during encoding, skipping applying a forward transform to residual coefficients of the current block prior to including in the bitstream representation, or during decoding, reconstructing residual coefficients of the current block from the bitstream representation without applying an inverse transform, and wherein the rule further specifies that a scale factor is applied to the residual coefficients independent of a size of the current block.
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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
发明人： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Na ZHANG , Yue WANG
IPC分类号： H04N19/119 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
摘要： 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：US20220150502A1
公开(公告)日：2022-05-12
申请号：US17585741
申请日：2022-01-27
发明人： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/46
摘要： 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：US20220124327A1
公开(公告)日：2022-04-21
申请号：US17646048
申请日：2021-12-27
发明人： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/117 , H04N19/119 , H04N19/132 , H04N19/174 , H04N19/176 , H04N19/70 , H04N19/184 , H04N19/82
摘要： 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：US20220103827A1
公开(公告)日：2022-03-31
申请号：US17506578
申请日：2021-10-20
发明人： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC分类号： H04N19/137 , H04N19/132 , H04N19/159 , H04N19/176
摘要： 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
发明人： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/117 , H04N19/176 , H04N19/96 , H04N19/82
摘要： 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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