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公开(公告)号：US11375217B2
公开(公告)日：2022-06-28
申请号：US17319994
申请日：2021-05-13
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N7/18 , H04N19/433 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/52 , H04N19/593 , H04N19/80 , H04N19/96 , H04N19/137 , H04N19/517 , H04N19/139 , H04N19/82 , H04N19/132 , H04N19/159 , H04N19/169 , H04N19/423 , H04N19/146 , H04N19/117 , H04N19/86
Abstract: A method of visual media processing 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 representation of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which 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：US11375211B2
公开(公告)日：2022-06-28
申请号：US17011131
申请日：2020-09-03
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/107 , H04N19/176 , H04N19/105 , H04N19/117 , H04N19/119 , H04N19/583 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/132
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：US11375188B2
公开(公告)日：2022-06-28
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 , H04N19/70 , H04N19/174 , H04N19/31 , H04N19/82
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：US20220191549A1
公开(公告)日：2022-06-16
申请号：US17689709
申请日：2022-03-08
Inventor： Li ZHANG , Kai ZHANG , Jizheng XU , Hongbin LIU
IPC: H04N19/70 , H04N19/176 , H04N19/159 , H04N19/124 , H04N19/593
Abstract: A method of video processing includes determining, for a conversion between a current block of a video and a coded representation of the video, whether a syntax element indicating usage of a skip mode for an intra-block copy (IBC) coding model is included in the coded representation according to a rule that specifies that signaling of the syntax element is based on a dimension of the current block and/or a maximum allowed dimension for a block that is coded using the IBC coding model. The method also includes performing the conversion based on the determining.
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公开(公告)号：US11363291B2
公开(公告)日：2022-06-14
申请号：US17405179
申请日：2021-08-18
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/513 , H04N19/176 , H04N19/132
Abstract: A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.
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Patent Agency Ranking
公开(公告)号：US20220182667A1
公开(公告)日：2022-06-09
申请号：US17651975
申请日：2022-02-22
Inventor： Junru LI , Meng WANG , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG , Shiqi WANG
IPC: H04N19/593 , H04N19/186 , H04N19/132 , H04N19/176 , H04N19/105 , H04N19/159
Abstract: A video processing method includes performing a conversion between a video including a video unit and a coded representation of the video, where, after the video unit is encoded or decoded with an intra prediction mode, one or more frequence tables and/or one or more sorted intra prediction mode (IPM) tables are selectively updated according to a rule, where the one or more frequence tables include information about frequence of the intra prediction mode used for processing the video unit in the conversion, where the frequence indicates an occurrence of the intra prediction mode used for the conversion, and where the one or more sorted IPM tables indicate the intra prediction mode used in the processing.
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公开(公告)号：US20220182655A1
公开(公告)日：2022-06-09
申请号：US17671486
申请日：2022-02-14
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG , Hsiao Chiang CHUANG
IPC: H04N19/50 , H04N19/186 , H04N19/176 , H04N19/136 , H04N19/132 , H04N19/169 , H04N19/159 , H04N19/119 , H04N19/124 , H04N19/70
Abstract: Methods, systems, and devices for using palette mode with different partition structures are described. An example method for video processing includes maintaining, for a conversion between a video comprising one or more video regions comprising a current video block and a bitstream representation of the video, a palette prediction table for a prediction of a palette used in a palette mode coding tool used for the current video block, making a determination that a local dual tree coding is applied to the conversion, modifying, based on the determination, the palette prediction table, and performing, based on the palette prediction table subsequent to the modifying, the conversion, wherein the palette mode coding tool represents the current video block using a palette of representative color values, and wherein the local dual tree coding enables partitioning of chroma blocks independently from corresponding luma blocks based on a block size.
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公开(公告)号：US20220174310A1
公开(公告)日：2022-06-02
申请号：US17386497
申请日：2021-07-27
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/52 , H04N19/176 , H04N19/593
Abstract: A method of visual media processing 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, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which 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：US11350098B2
公开(公告)日：2022-05-31
申请号：US17342951
申请日：2021-06-09
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/159 , H04N19/176 , H04N19/70 , H04N19/186 , H04N19/132 , H04N19/105 , H04N19/12 , H04N19/60 , H04N19/117 , 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 generating, for a conversion between a current video block of a video and a coded representation of the current video block, a most probable mode (MPM) list based on a rule, where the rule is based on whether a neighboring video block of the current video block is coded with a matrix based intra prediction (MIP) mode, and performing the conversion between the current video block and the coded representation of the current video block using the MPM list, where the conversion applies a non-MIP mode to the current video block, and where the non-MIP mode is different from the MIP mode.
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公开(公告)号：US11343509B2
公开(公告)日：2022-05-24
申请号：US16940959
申请日：2020-07-28
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/139 , H04N19/52 , H04N19/513 , H04N19/523 , H04N19/107 , H04N19/176
Abstract: A method of processing a video bitstream includes determining a motion precision set based on coding information of a current block. A conversion between a video block and a coded representation of the video block is performed based on the motion precision set. The conversion corresponds to a reconstruction of the current block. In some example aspects, a motion vector difference (MVD) precision of a current block from a motion precision set is determined based on a selected motion precision set and a MVD precision index. A conversion between a video block and a coded representation of the video block using an MVD is performed based on the MVD precision. The MVD represents a difference between a predicted motion vector and an actual motion vector used during motion compensation processing.
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