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公开(公告)号：US11838523B2
公开(公告)日：2023-12-05
申请号：US17857874
申请日：2022-07-05
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/105 , H04N19/196 , H04N19/12 , H04N19/126 , H04N19/176 , H04N19/186 , H04N11/04
CPC classification number: H04N19/196 , H04N11/044 , H04N19/105 , H04N19/12 , H04N19/126 , H04N19/176 , H04N19/186
Abstract: A method for implementing an adaptive color transform (ACT) during image/video encoding and decoding, comprises determining, for a conversion between a video comprising a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion, wherein, in response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks, and wherein each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.
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公开(公告)号：US11831897B2
公开(公告)日：2023-11-28
申请号：US16951137
申请日：2020-11-18
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/513 , H04N19/105 , H04N19/176 , H04N19/573
CPC classification number: H04N19/513 , H04N19/105 , H04N19/176 , H04N19/573
Abstract: Methods, systems, and devices related to sub-block based motion prediction in video coding are described. In one representative aspect, a video processing method includes partitioning a video block into a first set of sub-blocks according to a first pattern, partitioning the video block into a second set of sub-blocks according to a second pattern, wherein at least one sub-block in the second set has a different size than a sub-block in the first set, and determining a prediction block corresponding to a combination of a first intermediate prediction block that is predictively generated from the first set of sub-blocks and a second intermediate prediction block that is predictively generated from the second set of sub-blocks.
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公开(公告)号：US11831877B2
公开(公告)日：2023-11-28
申请号：US17646412
申请日：2021-12-29
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/12 , H04N19/60 , H04N19/117 , H04N19/70 , H04N19/82 , H04N19/186
CPC classification number: H04N19/132 , H04N19/105 , H04N19/117 , H04N19/12 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/60 , H04N19/70 , H04N19/82
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 conversion between a current video block of a video and a bitstream representation of the current video block using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.
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公开(公告)号：US11825113B2
公开(公告)日：2023-11-21
申请号：US17403707
申请日：2021-08-16
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/51 , H04N19/593
CPC classification number: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/51 , H04N19/593
Abstract: The present disclosure relate to interaction between intra block copy mode and inter prediction tools A method for video processing is provided, including: determining that an Intra-Block-Copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, at least one reference picture used by the current video block is a current picture where the current video block is located in; making a decision regarding a disabling of a specific coding mode for the current block; performing, based on the decision, a conversion between the current video block and the bitstream representation; wherein the specific coding mode uses a motion vector and a non-current picture to derive a prediction of a video block.
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公开(公告)号：US11825074B2
公开(公告)日：2023-11-21
申请号：US17220301
申请日：2021-04-01
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/00 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/184
CPC classification number: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/184
Abstract: Generation and usage of combined affine merge candidate are described. In a representative aspect, a method of video processing includes: generating, during a conversion between a current block of video and a bitstream of the video, an updated merge candidate list by adding at least one combined merge candidate to a first merge candidate list; and performing the conversion by using the updated merge candidate list, wherein the first merge candidate list includes one or more sub-block prediction based merge candidates.
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Patent Agency Ranking
公开(公告)号：US11825030B2
公开(公告)日：2023-11-21
申请号：US17353612
申请日：2021-06-21
Inventor： Jizheng Xu , Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/593 , H04N19/176 , H04N19/184 , H04N19/96
CPC classification number: H04N19/593 , H04N19/176 , H04N19/184 , H04N19/96
Abstract: The application relates to an intra block copy mode with dual tree partition. A method of video processing is disclosed. The method of video processing includes: determining, during a conversion between a current video block and a bitstream representation of the current video block, a block vector for the current video block; and performing, at least based on the block vector, the conversion, wherein when the current video block is coded with a coding mode using a reference block for prediction pointing to a same picture that the current video block is located in, and the current video block is a first type of block, the block vector is derived from at least one second type of block.
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公开(公告)号：US11805268B2
公开(公告)日：2023-10-31
申请号：US17353629
申请日：2021-06-21
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/50 , H04N19/117 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/157 , H04N19/593
CPC classification number: H04N19/50 , H04N19/117 , H04N19/157 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/593
Abstract: A method for video bitstream processing includes generating, using a first video block derived from a third video block of a first component and having a first size, a prediction block for a second video block of a video related to a second component, where the first component is different from the second component, and where the second video block has a second size that is different from the first size. The method also includes performing, using the prediction block, a conversion between the second video block and a bitstream representation of the video according to a two-step cross-component prediction mode (TSCPM).
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公开(公告)号：US11805259B2
公开(公告)日：2023-10-31
申请号：US17209410
申请日：2021-03-23
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/137 , H04N19/105 , H04N19/117 , H04N19/176 , H04N19/513 , H04N19/80
CPC classification number: H04N19/137 , H04N19/105 , H04N19/117 , H04N19/176 , H04N19/513 , H04N19/80
Abstract: A method, a video processing apparatus and computer-readable program medium for video process is disclosed. The method of video coding including: using, during a conversion between a current block of video and a bitstream representation of the current block, an affine motion mode for the current block; updating motion information of the current block after motion compensation so as to obtain updated motion information of the current block; and using the updated motion information during conversion of subsequent video blocks and their respective bitstream representations.
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公开(公告)号：US20230345038A1
公开(公告)日：2023-10-26
申请号：US18342514
申请日：2023-06-27
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/513 , H04N19/176 , H04N19/44 , H04N19/56
CPC classification number: H04N19/513 , H04N19/176 , H04N19/44 , H04N19/56
Abstract: Methods of enabling and disabling a decoder-side motion vector refinement (DMVR) video decoder and/or encoder are described. One example method includes determining a width (W) and a height (H) of a video block, making a determination, based on a condition of the video block, between enabling and disabling a decoder side motion vector refinement step for a conversion between the video block and a coded representation of the video block, in a case that the determination is enabling, performing the conversion by enabling the decoder side motion vector refinement step; and in a case that the determination is disabling, performing the conversion by disabling the decoder side motion vector refinement step, wherein the decoder side motion vector refinement step includes refining value of a motion vector signaled in the coded representation and using the refined value during the conversion.
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公开(公告)号：US20230345025A1
公开(公告)日：2023-10-26
申请号：US18339012
申请日：2023-06-21
Inventor： Ye-Kui Wang , Kai Zhang , Li Zhang , Yang Wang , Jizheng Xu , Zhipin Deng
Abstract: A mechanism for processing video data is disclosed. Video decoder initialization information is signaled between an encoder to a decoder. The video decoder initialization information contains a range of initialization parameters for a plurality of video units when the plurality of video units are coded according to a same video codec and a same profile. A conversion is performed between a visual media data and a visual media data file based on the range of initialization parameters.
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