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公开(公告)号：US20220210447A1
公开(公告)日：2022-06-30
申请号：US17692782
申请日：2022-03-11
Applicant: Bytedance Inc.
Inventor： Li ZHANG , Weijia ZHU , Jizheng XU
IPC: H04N19/186 , H04N19/159 , H04N19/176 , H04N19/169
Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block of a video and a bitstream of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, one or multiple predictor palettes are used for predicting the palette of representative sample values, and wherein updating of the one or multiple predictor palettes after the conversion of the current block is disabled according to a rule based on a characteristic of the current block.
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公开(公告)号：US20220210444A1
公开(公告)日：2022-06-30
申请号：US17386519
申请日：2021-07-27
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/176 , H04N19/174 , H04N19/52 , 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：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：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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Patent Agency Ranking
公开(公告)号：US20220159255A1
公开(公告)日：2022-05-19
申请号：US17589483
申请日：2022-01-31
Inventor： Jizheng XU , Zhipin DENG , Li ZHANG , Hongbin LIU
IPC: H04N19/119 , H04N19/96 , H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176
Abstract: A method of video processing is provided to include: performing a conversion between a video comprising one or more video regions comprising 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 a chroma block from the one or more chroma blocks having a size M×N is disallowed to be represented in the coded representation using an intra mode or an intra block copy mode, wherein M and N are integers that indicate a width and a height of the chroma block, respectively; wherein the intra mode includes encoding the chroma block based on previously encoded or reconstructed video blocks, and wherein the intra block copy mode includes encoding the chroma block using at least a block vector pointing to a video frame containing a video region.
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公开(公告)号：US20220132111A1
公开(公告)日：2022-04-28
申请号：US17568471
申请日：2022-01-04
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/117 , H04N19/176 , H04N19/132 , 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：US20220132106A1
公开(公告)日：2022-04-28
申请号：US17570723
申请日：2022-01-07
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/159
Abstract: A method of processing visual media includes performing a conversion between a current video block of a current picture of a visual media data and a bitstream representation of the visual media data using a buffer comprising reference samples from the current picture for derivation of a prediction block of the current video block. The conversion is based according to rule which specifies that, for the bitstream representation to conform the rule, a reference sample in the buffer is to satisfy a bitstream conformance constraint.
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公开(公告)号：US20220109876A1
公开(公告)日：2022-04-07
申请号：US17406260
申请日：2021-08-19
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/61 , H04N19/159 , H04N19/186 , H04N19/176
Abstract: A video processing method includes determining, for a conversion between a block of a video and a bitstream representation of the video, that an output value from an inverse secondary transform with a reduced dimension (e.g., an inverse low frequency non-separable transform) is constrained within a range of [min, max] inclusively. The inverse secondary transform is applicable to the block between a de-quantization step and an inverse primary transform. The reduced dimension is reduced from a dimension of the block, and min and max are integer values. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220109868A1
公开(公告)日：2022-04-07
申请号：US17554294
申请日：2021-12-17
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/137 , G06F7/499 , G06F5/01 , H04N19/176 , H04N19/105
Abstract: Devices, systems and methods for digital video coding, which include sub-block based inter prediction methods, are described. An exemplary method for video processing includes determining, for a conversion between a current block of video and a bitstream representation of the video, a maximum number of candidates in a sub-block based merge candidate list and/or whether to add sub-block based temporal motion vector prediction (SbTMVP) candidates to the sub-block based merge candidate list based on whether temporal motion vector prediction (TMVP) is enabled for use during the conversion or whether a current picture referencing (CPR) coding mode is used for the conversion, and performing, based on the determining, the conversion.
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