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公开(公告)号：US20210266585A1
公开(公告)日：2021-08-26
申请号：US17244633
申请日：2021-04-29
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/517 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
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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公开(公告)号：US20210266584A1
公开(公告)日：2021-08-26
申请号：US17319961
申请日：2021-05-13
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/423 , H04N19/137 , H04N19/105 , H04N19/159 , H04N19/30 , H04N19/176
Abstract: Usage for History-based affine parameters is described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a current block of video and a bitstream representation of the current block, affine related information associated with affine model for the current block based on affine parameters stored in a buffer for storing affine related information of blocks coded prior the current block; and performing the conversion by using the affine related information.
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公开(公告)号：US20210258572A1
公开(公告)日：2021-08-19
申请号：US17246821
申请日：2021-05-03
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/186 , H04N19/176 , H04N19/184 , H04N19/159
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, a final prediction P(x, y) of a chroma sample at a position (x, y) in the current video block as a combination of prediction results of multiple cross-component linear models (MCCLMs), wherein the MCCLMs are selected based on the position (x, y) of the chroma sample; and performing the conversion based on the final prediction.
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公开(公告)号：US20210258571A1
公开(公告)日：2021-08-19
申请号：US17246794
申请日：2021-05-03
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/70 , H04N19/159
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, multiple sets of parameters, wherein each set of parameters defines a cross-component linear model (CCLM) and is derived from a corresponding group of chroma samples at corresponding chroma sample positions; determining, based on the multiple sets of parameters, parameters for a final CCLM; and performing the conversion based on the final CCLM.
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公开(公告)号：US20210203945A1
公开(公告)日：2021-07-01
申请号：US17203604
申请日：2021-03-16
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/137 , H04N19/132 , H04N19/105 , H04N19/46
Abstract: A method of video processing is provided to include: performing a conversion between one or more video blocks of a video and a coded representation of the video, wherein a first field in the coded representation indicates whether fractional sample precision is used for indicating motion distances in a merge with motion vector difference (MMVD) mode used during the conversion, and wherein the MMVD mode includes a motion vector expression that includes a starting point, a motion distance and a motion direction for the current video block.
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Patent Agency Ranking
公开(公告)号：US20210203922A1
公开(公告)日：2021-07-01
申请号：US17199985
申请日：2021-03-12
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/176
Abstract: Techniques for video encoding and decoding are described. An example method of video processing is disclosed. The method includes classifying motion candidates in a candidate list into a plurality of categories of motion candidates, each category being assigned a corresponding pruning rule; performing pruning or skipping the pruning of the motion candidates in the candidate list based on the corresponding pruning rule, the pruning being applied to determine whether to insert motion candidates from the candidate list into a final candidate list for a current block; and performing a video processing on the current block based on the final candidate list.
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公开(公告)号：US20210160529A1
公开(公告)日：2021-05-27
申请号：US17167192
申请日：2021-02-04
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/176
Abstract: Devices, systems, and methods for digital video coding, which includes constructing separate motion candidate lists for video coding, are described. An exemplary method for video processing includes constructing, for a first video block of a video, a first motion candidate list using a first motion candidate list construction method that excludes motion candidates that are only derived from temporal blocks, and performing a conversion between the first video block and a bitstream representation of the video including the first video block according to the constructed first motion candidate list.
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公开(公告)号：US20210152845A1
公开(公告)日：2021-05-20
申请号：US17154565
申请日：2021-01-21
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/52 , H04N19/176 , H04N19/109 , H04N19/46
Abstract: A method of video processing is provided to include determining, for a conversion between a current video block of a video and a coded representation of the video, a mode of operation of an UMVE mode; and performing the conversion based on the determining, wherein the current video block is coded with a merge mode and motion vector differences in an UMVE mode that comprises a motion vector expression that includes a starting point of motion information, a motion magnitude and a motion direction for the current video block, and wherein one or more fields in the coded representation correspond to the mode of operation, and wherein the one or more fields include: a list size field that indicates a size of a base candidate list used by the UMVE mode, or a table field that signals a distance table or a direction table for the UMVE mode.
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公开(公告)号：US20210152837A1
公开(公告)日：2021-05-20
申请号：US17162813
申请日：2021-01-29
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/189 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186
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 (CCLM) based on two or four chroma samples and/or corresponding luma samples; and performing the conversion based on the determining.
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公开(公告)号：US20200382800A1
公开(公告)日：2020-12-03
申请号：US16993487
申请日：2020-08-14
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/189 , H04N19/132 , H04N19/105 , H04N19/186 , H04N19/176
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 (CCLM) based on two or four chroma samples and/or corresponding luma samples; and performing the conversion based on the determining.
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