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公开(公告)号：US12284354B2
公开(公告)日：2025-04-22
申请号：US18319658
申请日：2023-05-18
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: 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 according to a rule, where the rule specifies a relationship between applicability of a matrix based intra prediction (MIP) mode or a transform mode during the conversion, where the MIP mode includes determining a prediction block of the current video block 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 where the transform mode specifies use of a transform operation for the determining the prediction block for the current video block.
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公开(公告)号：US12273515B2
公开(公告)日：2025-04-08
申请号：US18521244
申请日：2023-11-28
Inventor： Zhipin Deng , Li Zhang , Ye-Kui Wang , Kai Zhang , Jizheng Xu
IPC: H04N19/117 , H04N19/124 , H04N19/157 , H04N19/186 , H04N19/196 , H04N19/70 , H04N19/86
Abstract: Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example method of video processing includes performing a conversion between a video and a bitstream of the video according to a format rule. The format rule specifies that a first field at a sequence level or a picture level or a slice level controls a value of a second field in an adaptation parameter set.
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公开(公告)号：US12238314B2
公开(公告)日：2025-02-25
申请号：US17386510
申请日：2021-07-27
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/433 , H04N19/105 , H04N19/117 , H04N19/132 , H04N19/137 , H04N19/139 , H04N19/146 , H04N19/159 , H04N19/169 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/423 , H04N19/517 , H04N19/52 , H04N19/593 , H04N19/80 , H04N19/82 , H04N19/96 , H04N19/86
Abstract: A method of visual media processing is provided. The method includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode, and performing a conversion between a current video block of visual media data and a bitstream of the current video block. The conversion is performed using the reference samples stored in the buffer, and in the intra block copy (IBC) mode. The IBC mode is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.
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公开(公告)号：US20250039407A1
公开(公告)日：2025-01-30
申请号：US18915992
申请日：2024-10-15
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/159 , H04N19/107 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46
Abstract: Devices, systems, and methods for palette mode coding are described. An exemplary method for video processing includes determining, for a conversion between a block of a video region in a video and a bitstream representation of the video, a prediction mode based on one or more allowed prediction modes that include at least a palette mode of the block. An indication of usage of the palette mode is determined according to the prediction mode. The method also includes performing the conversion based on the one or more allowed prediction modes.
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公开(公告)号：US20240422350A1
公开(公告)日：2024-12-19
申请号：US18813993
申请日：2024-08-23
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/593 , H04N19/11 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186
Abstract: A method of video processing is described. The method includes: determining, based on a coding mode of a current video block of a video, whether a position dependent intra prediction combination (PDPC) method is used for coding the current video block based on a first rule, and performing a conversion between the current video block and a coded representation of the video according to the determining, wherein the PDPC method combines neighboring samples with a prediction signal of the current video block to generate a refined prediction signal of the current video block.
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Patent Agency Ranking
公开(公告)号：US12143641B2
公开(公告)日：2024-11-12
申请号：US17897835
申请日：2022-08-29
Inventor： Ye-kui Wang , Zhipin Deng , Li Zhang , Kai Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/105 , H04N19/117 , H04N19/169 , H04N19/172 , H04N19/174 , H04N19/189 , H04N19/196 , H04N19/46 , H04N19/58 , H04N19/635 , H04N19/82 , H04N19/86 , H04N19/127
Abstract: A video processing method is provided. The method includes: performing a conversion between a video including a plurality of pictures each including at least one slice and a bitstream of the video, wherein the bitstream conforms to a format rule. The format rule specifies that a first flag in the bitstream indicates whether a picture header syntax structure of a picture is included in a slice header of a slice of the picture; and responsive to any of six flags in a picture parameter set associated with the picture is equal to 1, the first flag is equal to 0.
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公开(公告)号：US12143632B2
公开(公告)日：2024-11-12
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：US12126805B2
公开(公告)日：2024-10-22
申请号：US17891800
申请日：2022-08-19
Inventor： Kai Zhang , Li Zhang , Ye-kui Wang , Zhipin Deng , Kui Fan , Jizheng Xu , Hongbin Liu
IPC: H04N19/103 , H04N19/119 , H04N19/129 , H04N19/157 , H04N19/169 , H04N19/172 , H04N19/174 , H04N19/70
CPC classification number: H04N19/129 , H04N19/103 , H04N19/119 , H04N19/157 , H04N19/172 , H04N19/174 , H04N19/1883 , H04N19/70
Abstract: Techniques for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video picture that includes one or more tiles and one or more rectangular slices and a bitstream of the video according to a rule. The rule specifies that, for iteratively determining information about the one or more rectangular slices, a variable indicating a tile index is updated only for slices having indices that are smaller than a value equal to a number of slices in the video picture minus 1.
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公开(公告)号：US12075038B2
公开(公告)日：2024-08-27
申请号：US17977582
申请日：2022-10-31
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/587 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/523 , H04N19/59 , H04N19/80
CPC classification number: H04N19/117 , H04N19/132 , H04N19/176 , H04N19/523 , H04N19/80
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a current picture of a video and a coded representation of the video, an applicability of an alternative interpolation filter, wherein the applicability of the alternative interpolation filter indicates whether to apply the alternative interpolation filter in the conversion; and performing the conversion based on the determining; wherein the applicability of the alternative interpolation filter is determined based on whether a reference picture resampling in which a reference picture of the current picture is resampled to perform the conversion is used.
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公开(公告)号：US12075030B2
公开(公告)日：2024-08-27
申请号：US18081404
申请日：2022-12-14
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/169 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/30 , H04N19/70
CPC classification number: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/30 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video unit of a video and a coded representation of the video using at least a video picture. Only one of a subpicture coding mode or a resolution-changing coding mode is enabled for the video unit. The subpicture coding mode is a mode in which the video picture is divided into multiple subpictures, and the resolution-changing coding mode is a mode in which a resolution of the video picture is adjusted during the conversion.
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