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公开(公告)号：US20230037931A1
公开(公告)日：2023-02-09
申请号：US17942552
申请日：2022-09-12
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/593 , 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 encoding a current video block of a video using a matrix 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; and adding, to a coded representation of the current video block, a syntax element indicative of applicability of the MIP mode to the current video block using arithmetic coding in which a context for the syntax element is derived based on a rule.
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公开(公告)号：US20220337844A1
公开(公告)日：2022-10-20
申请号：US17847005
申请日：2022-06-22
Inventor： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU , Yang WANG , Yue WANG
IPC: H04N19/132 , H04N19/137 , H04N19/105 , H04N19/176 , H04N19/70
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video and a bitstream representation of the video, an applicability of a geometric partitioning mode based on a rule; and performing the conversion based on the determining, and wherein the rule depends on a block width, a block height, and/or an aspect ratio of the current video block.
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公开(公告)号：US20220279169A1
公开(公告)日：2022-09-01
申请号：US17740753
申请日：2022-05-10
Inventor： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/169 , H04N19/30 , H04N19/186 , H04N19/176
Abstract: A method for visual media processing, including: computing, during a conversion between a current video block of visual media data and a bitstream representation of the current video block, a cross-component linear model (CCLM) and/or a chroma residual scaling (CRS) factor for the current video block based, at least in part, on neighboring samples of a corresponding luma block which covers a top-left sample of a collocated luma block associated with the current video block, wherein one or more characteristics of the current video block are used for identifying the corresponding luma block.
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公开(公告)号：US20220256148A1
公开(公告)日：2022-08-11
申请号：US17723089
申请日：2022-04-18
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/119 , H04N19/132 , H04N19/176 , H04N19/70
Abstract: An example method of video processing includes performing a conversion between a picture of a video and a bitstream representation of the video. The picture includes one or more sub-pictures, and the bitstream representation conforms to a format rule that specifies that a length of a syntax element is equal to Ceil(Log 2(SS)) bits. SS is greater than 0, and the syntax element indicating a horizontal or a vertical position of a top-left corner of a coding tree unit of a sub-picture of the picture.
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公开(公告)号：US20220232224A1
公开(公告)日：2022-07-21
申请号：US17699032
申请日：2022-03-18
Inventor： Jizheng XU , Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yue WANG
IPC: H04N19/157 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/60 , H04N19/124 , H04N19/132
Abstract: Methods, systems, and devices for high-precision transform and quantization for image and video coding are described. A example method of video processing includes determining, for a conversion between a video comprising a current block and a bitstream representation of the video, that the conversion comprises an application of a transform to the current block, and performing, based on the determining, the conversion, wherein a bit-shifting operation of a scaling process for transform coefficients associated with the transform is based on whether the current block is coded with a block-based differential pulse code modulation (BDPCM) mode.
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Patent Agency Ranking
公开(公告)号：US20220232207A1
公开(公告)日：2022-07-21
申请号：US17699021
申请日：2022-03-18
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a coded representation of the video, a position of a reference sample in a reference picture that is associated with the current picture based on a top-left position of a window of a picture. The picture includes at least the current picture or the reference picture, and the window is subject to a processing rule during the conversion. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220167011A1
公开(公告)日：2022-05-26
申请号：US17589537
申请日：2022-01-31
Inventor： Jizheng XU , Zhipin DENG , Li ZHANG , Hongbin LIU
IPC: H04N19/593 , H04N19/169 , H04N19/186 , H04N19/176 , H04N19/119 , H04N19/11 , H04N19/132 , H04N19/70 , H04N19/159
Abstract: A method of video processing is provided to include: performing a conversion between a video comprising a video region having one or more luma blocks and one or more chroma blocks and a coded representation of the video according to a rule, wherein the rule specifies that use of an intra block copy (IBC) mode is available for the one or more luma blocks and the one or more chroma blocks having a block size M×N, for all values of M and N, where M and N are integers; wherein, using the IBC mode, a video block is coded using at least a block vector pointing to a video frame containing the video block.
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公开(公告)号：US20220159254A1
公开(公告)日：2022-05-19
申请号：US17589168
申请日：2022-01-31
Inventor： Jizheng XU , Zhipin DENG , Li ZHANG , Hongbin LIU
IPC: H04N19/119 , H04N19/169 , H04N19/186 , H04N19/176 , H04N19/136 , H04N19/105 , H04N19/174 , H04N19/107 , H04N19/503 , H04N19/593
Abstract: A method of video processing is provided to include: determining a partitioning scheme for partitioning a chroma video region of a video into one or more chroma blocks based on a color format of the video according to a rule; and performing a conversion between the video and a coded representation of the video according to the partitioning scheme.
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公开(公告)号：US20220150491A1
公开(公告)日：2022-05-12
申请号：US17582600
申请日：2022-01-24
Inventor： Zhipin DENG , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/119 , H04N19/176 , H04N19/186 , H04N19/132 , H04N19/127 , H04N19/172 , H04N19/60 , H04N19/169
Abstract: Methods, systems, and devices for coding or decoding video wherein the picture partition mode is based on block size are described. An example method for video processing includes using a dimension of a virtual pipeline data unit (VPDU) used for a conversion between a video comprising one or more video regions comprising one or more video blocks and a bitstream representation of the video to perform a determination of whether a ternary-tree (TT) or a binary tree (BT) partitioning of a video block of the one or more video blocks is enabled, and performing, based on the determination, the conversion, wherein the dimension is equal to VSize in luma samples, wherein dimensions of the video block are CtbSizeY in luma samples, wherein VSize=min(M, CtbSizeY), and wherein M is a positive integer.
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公开(公告)号：US20220132104A1
公开(公告)日：2022-04-28
申请号：US17568599
申请日：2022-01-04
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/132 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: A method of video processing includes making a first determination about whether a decoder-side motion vector refinement (DMVR) tool is enabled for a conversion between a current block of a current picture of a video and a coded representation of the video; making a second determination, based on the first determination, about whether or how to clip a motion vector according to a bounding block for reference sample padding in a reference picture used for determining a prediction block for the current block according to a rule, and performing the conversion based on the first determination and the second determination. By using the DMVR tool, an encoded motion vector from the coded representation is refined prior to using for determining the prediction block.
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