-
公开(公告)号：US11831877B2
公开(公告)日：2023-11-28
申请号：US17646412
申请日：2021-12-29
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/12 , H04N19/60 , H04N19/117 , H04N19/70 , H04N19/82 , H04N19/186
CPC classification number: 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 using a matrix based 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, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.
-
公开(公告)号：US11825030B2
公开(公告)日：2023-11-21
申请号：US17353612
申请日：2021-06-21
Inventor： Jizheng Xu , Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/593 , H04N19/176 , H04N19/184 , H04N19/96
CPC classification number: H04N19/593 , H04N19/176 , H04N19/184 , H04N19/96
Abstract: The application relates to an intra block copy mode with dual tree partition. A method of video processing is disclosed. The method of video processing includes: determining, during a conversion between a current video block and a bitstream representation of the current video block, a block vector for the current video block; and performing, at least based on the block vector, the conversion, wherein when the current video block is coded with a coding mode using a reference block for prediction pointing to a same picture that the current video block is located in, and the current video block is a first type of block, the block vector is derived from at least one second type of block.
-
公开(公告)号：US11805268B2
公开(公告)日：2023-10-31
申请号：US17353629
申请日：2021-06-21
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/50 , H04N19/117 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/157 , H04N19/593
CPC classification number: H04N19/50 , H04N19/117 , H04N19/157 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/593
Abstract: A method for video bitstream processing includes generating, using a first video block derived from a third video block of a first component and having a first size, a prediction block for a second video block of a video related to a second component, where the first component is different from the second component, and where the second video block has a second size that is different from the first size. The method also includes performing, using the prediction block, a conversion between the second video block and a bitstream representation of the video according to a two-step cross-component prediction mode (TSCPM).
-
公开(公告)号：US20230345025A1
公开(公告)日：2023-10-26
申请号：US18339012
申请日：2023-06-21
Inventor： Ye-Kui Wang , Kai Zhang , Li Zhang , Yang Wang , Jizheng Xu , Zhipin Deng
Abstract: A mechanism for processing video data is disclosed. Video decoder initialization information is signaled between an encoder to a decoder. The video decoder initialization information contains a range of initialization parameters for a plurality of video units when the plurality of video units are coded according to a same video codec and a same profile. A conversion is performed between a visual media data and a visual media data file based on the range of initialization parameters.
-
公开(公告)号：US11792413B2
公开(公告)日：2023-10-17
申请号：US17857924
申请日：2022-07-05
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/196 , H04N19/12 , H04N19/126 , H04N19/176 , H04N19/105 , H04N19/186 , H04N11/04
CPC classification number: H04N19/196 , H04N11/044 , H04N19/105 , H04N19/12 , H04N19/126 , H04N19/176 , H04N19/186
Abstract: Methods, systems and devices for implementing an adaptive color transform (ACT) during image/video encoding and decoding, including: determining, for a conversion between a video comprising a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion, wherein, in response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks, and wherein each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.
-
Patent Agency Ranking
公开(公告)号：US11778181B2
公开(公告)日：2023-10-03
申请号：US17723175
申请日：2022-04-18
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/00 , H04N19/119 , H04N19/132 , H04N19/176 , H04N19/70 , H04N19/117 , H04N19/186 , H04N19/46 , H04N19/82
CPC classification number: H04N19/119 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/70 , H04N19/82
Abstract: An example method of video processing includes determining, for a conversion between a block of a first sub-picture of a video and a bitstream representation of the video, whether to apply a deblocking process across an edge between the block and a neighboring block of a second sub-picture based on whether a loop filtering process is allowed across subpicture boundaries. The method also includes performing the conversion based on the determining.
-
公开(公告)号：US11778176B2
公开(公告)日：2023-10-03
申请号：US17947909
申请日：2022-09-19
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N19/11 , H04N19/159 , H04N19/593 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/52
CPC classification number: H04N19/11 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/593 , H04N19/52
Abstract: Methods and apparatus for video processing are described. One example method includes determining, for a conversion between a video block of a video and a bitstream of the video, that the video block satisfies a condition. The video block is coded in the bitstream using an intra block copy mode. The method further includes performing the conversion based on the determining. Here, due to the video block satisfying the condition, a portion of an intra block copy buffer is reset during the conversion.
-
公开(公告)号：US20230308659A1
公开(公告)日：2023-09-28
申请号：US18328548
申请日：2023-06-02
Inventor： Jizheng Xu , Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Yue Wang
IPC: H04N19/157 , H04N19/124 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/60
CPC classification number: H04N19/157 , H04N19/124 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/60
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. 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.
-
公开(公告)号：US20230300379A1
公开(公告)日：2023-09-21
申请号：US18324577
申请日：2023-05-26
Applicant: Bytedance Inc.
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/96 , H04N19/176
CPC classification number: H04N19/70 , H04N19/132 , H04N19/159 , H04N19/96 , H04N19/176
Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes: for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, identifying usage of a coding mode and/or an intra prediction mode and/or a set of allowable intra prediction modes; and upon identifying the usage, making a decision of whether to include or exclude, in the bitstream representation, a syntax element indicative of selectively applying a transform skip mode to the current video block, wherein, in the transform skip mode, a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation of the visual media data without applying a transformation.
-
公开(公告)号：US20230300337A1
公开(公告)日：2023-09-21
申请号：US18322461
申请日：2023-05-23
Inventor： Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang , Jizheng Xu , Yang Wang , Yue Wang
IPC: H04N19/132 , H04N19/105 , H04N19/137 , H04N19/176 , H04N19/70
CPC classification number: H04N19/132 , H04N19/105 , H04N19/137 , H04N19/176 , H04N19/70
Abstract: A method of processing video data is described. The method includes performing a conversion between a current video block of a video and a bitstream of the video. A geometric partitioning mode index for the current video block is coded in the bitstream and a binarization of the geometric partitioning mode index is performed according to a rule. The geometric partitioning mode index specifies a geometric splitting shape of a geometric partitioning mode applied to the current video block. The rule specifies that the geometric partitioning mode index is coded with a fixed-length binarization.
-
-
-
-
-
-
-
-
-
Search Results
557
records
(took 0.031 seconds)
