-
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.
-
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.
-
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.
-
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.
-
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.
-
Patent Agency Ranking
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.
-
公开(公告)号：US20220159259A1
公开(公告)日：2022-05-19
申请号：US17585788
申请日：2022-01-27
Inventor： Kui FAN , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/13 , H04N19/96 , H04N19/60 , H04N19/176 , H04N19/70
Abstract: A video processing method is described. The method includes performing a conversion between a video region of a video and a coded representation of the video, wherein the performing of the conversion includes configuring, based on a partition type of the video region, a context model for coding a first bin, the first bin and a second bin included in a bin string corresponding to an index of a secondary transform tool, wherein the index indicates an applicability of the secondary transform tool and/or a kernel information of the secondary transform tool, and wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization to the video block before applying an inverse primary transform.
-
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.
-
公开(公告)号：US20220150544A1
公开(公告)日：2022-05-12
申请号：US17582739
申请日：2022-01-24
Inventor： Zhipin DENG , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/61 , H04N19/176 , H04N19/167 , H04N19/119 , H04N19/109 , H04N19/70 , H04N19/11 , H04N19/107
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.
-
公开(公告)号：US20220150508A1
公开(公告)日：2022-05-12
申请号：US17579994
申请日：2022-01-20
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/139 , H04N19/105 , H04N19/176 , H04N19/189
Abstract: Devices, systems and methods for digital video coding, which includes restrictions on decoder-side motion vector derivation based on coding information, are described. An exemplary method for video processing includes making a decision, for a conversion between a current block of a video and a bitstream representation of the video, regarding a selective enablement of a decoder side motion vector derivation (DMVD) tool for the current block, the DMVD tool deriving a refinement of motion information signaled in the bitstream representation, and the conversion using a merge mode and motion vector differences that are indicated by a motion direction and a motion magnitude, and performing, based on the decision, a conversion between the current block and the bitstream representation.
-
-
-
-
-
-
-
-
-
Search Results
610
records
(took 0.024 seconds)
