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公开(公告)号：US11115676B2
公开(公告)日：2021-09-07
申请号：US17167266
申请日：2021-02-04
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/51 , H04N19/593
Abstract: The present disclosure relate to interaction between intra block copy mode and inter prediction tools A method for video processing is provided, including: determining that an Intra-Block-Copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, at least one reference picture used by the current video block is a current picture where the current video block is located in; making a decision regarding a disabling of a specific coding mode for the current block; performing, based on the decision, a conversion between the current video block and the bitstream representation; wherein the specific coding mode uses a motion vector and a non-current picture to derive a prediction of a video block.
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公开(公告)号：US11109059B2
公开(公告)日：2021-08-31
申请号：US17098962
申请日：2020-11-16
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/52 , H04N19/176 , H04N19/184 , H04N19/70 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/56 , H04N19/96
Abstract: Devices, systems and methods for digital video coding, which includes motion prediction based on updated motion vectors generated using two-step inter-prediction, are described. Methods for clipping of updated MV or derived MV are described. An exemplary method for video coding includes: determining original motion information for a current block; updating original motion vectors of the original motion information for the current block based on a refining method; clipping the updated motion vectors to be within a range; and performing a conversion between the current block and a bitstream representation of a video including the current block, based on the clipped updated motion vectors.
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公开(公告)号：US11070821B2
公开(公告)日：2021-07-20
申请号：US17031208
申请日：2020-09-24
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/176 , H04N19/184 , H04N19/169 , H04N19/52 , H04N19/70 , H04N19/105 , H04N19/119 , H04N19/46 , H04N19/51 , H04N19/159
Abstract: A method for processing a video includes performing a determination, by a processor, that a first video block is partitioned to include a first prediction portion that is non-rectangular and non-square; adding a first motion vector (MV) prediction candidate associated with the first prediction portion to a motion candidate list associated with the first video block, wherein the first MV prediction candidate is derived from a sub-block MV prediction candidate; and performing further processing of the first video block using the motion candidate list.
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公开(公告)号：US11064206B2
公开(公告)日：2021-07-13
申请号：US16998406
申请日：2020-08-20
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/159 , H04N19/172 , H04N19/176 , H04N19/96 , H04N19/117 , H04N19/132 , H04N19/186
Abstract: Devices, systems and methods for digital video coding, which includes inter prediction with refinement, are described. An exemplary method of video processing includes determining to use, for a conversion between a current block of a video and a bitstream representation of the video, a first linear optimization model for the conversion using a first coding mode, the first linear optimization model being derived from a second linear optimization model that is used for the conversion using a second coding mode, and performing, based on the determining, the conversion. Another exemplary method of video processing includes determining to use, for a conversion between a current block of a video and a bitstream representation of the video, a gradient value computation algorithm for a bi-directional optical flow tool, and performing, based on the determining, the conversion.
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公开(公告)号：US11057642B2
公开(公告)日：2021-07-06
申请号：US16987670
申请日：2020-08-07
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/593 , H04N19/176 , H04N19/186
Abstract: A method for video processing is provided. The method includes performing downsampling on chroma and luma samples of a neighboring block of the current video block; determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, parameters of cross-component linear model (CCLM) based on the downsampled chroma and luma samples obtained from the downsampling; applying the CCLM on luma samples located in a luma block corresponding to the current video block to derive prediction values of the current video block; and performing the conversion based on the prediction values.
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Patent Agency Ranking
公开(公告)号：US11057620B2
公开(公告)日：2021-07-06
申请号：US17018200
申请日：2020-09-11
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/46 , H04N19/176 , H04N19/184
Abstract: A method of video decoding includes checking one or more video blocks in pre-defined relative positions compared to a first video block to derive a first set of candidates, wherein each of the first set of candidates is derived from corresponding motion information of the video blocks checked, checking, upon a determination that a number of the first set of candidates has not reached a predetermined limit, one or multiple tables to derive a second set of candidates, and processing the first video block based on a bitstream representation of the first video block and the constructed candidate list.
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公开(公告)号：US11051031B2
公开(公告)日：2021-06-29
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 , H04N19/583 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/119
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：US11019344B2
公开(公告)日：2021-05-25
申请号：US16940826
申请日：2020-07-28
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/593 , H04N19/176 , H04N19/44 , H04N19/149 , H04N19/105 , H04N19/132 , H04N19/186 , H04N19/30 , H04N19/159 , H04N19/11 , H04N19/50
Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, parameters of a cross-component linear model based on selected chroma samples based on positions of the chroma samples, wherein the selected chroma samples are selected from a group of neighboring chroma samples; and performing the conversion based on the determining.
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公开(公告)号：US20210067783A1
公开(公告)日：2021-03-04
申请号：US17098962
申请日：2020-11-16
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/137 , H04N19/105 , H04N19/132 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which includes motion prediction based on updated motion vectors generated using two-step inter-prediction, are described. Methods for clipping of updated MV or derived MV are described. An exemplary method for video coding includes: determining original motion information for a current block; updating original motion vectors of the original motion information for the current block based on a refining method; clipping the updated motion vectors to be within a range; and performing a conversion between the current block and a bitstream representation of a video including the current block, based on the clipped updated motion vectors.
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公开(公告)号：US20250168370A1
公开(公告)日：2025-05-22
申请号：US19033178
申请日：2025-01-21
Applicant: Bytedance Inc.
Inventor： Semih Esenlik , Zhaobin Zhang , Kai Zhang , Li Zhang
IPC: H04N19/192 , H04N19/124 , H04N19/70
Abstract: An image decoding method including transforming an input image into latent samples using an analysis transform; quantizing the latent samples using a hyper encoder to generate quantized hyper latent samples; encoding the quantized hyper latent samples into a bitstream using entropy encoding; applying a latent sample prediction process to obtain quantized latent samples and quantized residual latent samples based on the latent samples using the quantized hyper latent samples; obtaining prediction samples following the latent sample prediction process; and entropy encoding the quantized hyper latent samples and the quantized residual latent samples into the bitstream.
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