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公开(公告)号：US20250056003A1
公开(公告)日：2025-02-13
申请号：US18807369
申请日：2024-08-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huanbang CHEN , Haitao YANG , Jianle CHEN , Jiali FU
IPC: H04N19/139 , H04N19/119 , H04N19/176 , H04N19/61
Abstract: A motion vector prediction method includes parsing a bitstream to obtain an index value of a candidate motion vector list and constructing the candidate motion vector list that includes. candidate motion vectors of K control points of a current block. The candidate motion vectors of K control points are obtained based on a 2N-parameter affine transform model used for a neighboring block of the current block, where N and K are integers greater than or equal to 2 and less than or equal to 4 with N not being equal to K. The method further includes determining, in the candidate motion vector list, target candidate motion vectors of the K control points based on the index value and obtaining a predicted motion vector of each subblock of the current block based on the target candidate motion vectors of the K control points.
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公开(公告)号：US20250039412A1
公开(公告)日：2025-01-30
申请号：US18906531
申请日：2024-10-04
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Roman Igorevich CHERNYAK , Yin ZHAO , Sergey Yurievich IKONIN , Jianle CHEN
IPC: H04N19/186 , H04N19/176 , H04N19/44 , H04N19/60 , H04N19/70
Abstract: A method comprising obtaining a bitstream, the bitstream comprises a transform unit syntax and a coding unit syntax, the transform unit syntax includes a value of a first flag and a value of a second flag related to, respectively, a first chroma transform block and a second chroma transform block of a current transform unit or a current sub-transform unit within the current transform unit, the first or second flag specifies whether the first or second chroma transform block contains at least one transform coefficient levels not equal to 0, the coding unit syntax includes a value of a third flag specifying whether a transform tree structure is present or not; and deriving a value of a fourth flag based on the values of the first, second, and third flags, the fourth flag specifies whether a luma transform block contains at least one transform coefficient levels not equal to 0.
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公开(公告)号：US20240323427A1
公开(公告)日：2024-09-26
申请号：US18660485
申请日：2024-05-10
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Han GAO , Semih ESENLIK , Biao WANG , Anand Meher KOTRA , Jianle CHEN
IPC: H04N19/513 , H04N19/176
CPC classification number: H04N19/513 , H04N19/176
Abstract: The present disclosure provides methods and devices of construct a candidate merge list for Intra block copy (IBC) mode, the method comprising: inserting a block vector of a left neighboring block of a current block into an initial merge list, when the left neighboring block is available and the left neighboring block is using IBC mode; inserting a block vector of an above neighboring block of the current block into the initial merge list, when the above neighboring block is available, the above neighboring block is using IBC mode and the block vector of the above neighboring block is not same as the block vector of the left neighboring block; inserting a block vector of the last candidate in a history based motion vector predictor (HMVP) into the initial merge list; obtaining a block vector of the current block according to the initial merge list.
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公开(公告)号：US20240305784A1
公开(公告)日：2024-09-12
申请号：US18665853
申请日：2024-05-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yin ZHAO , Haitao YANG , Jianle CHEN
IPC: H04N19/132 , H04N19/159 , H04N19/169 , H04N19/176 , H04N19/186 , H04N19/96
CPC classification number: H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/96
Abstract: Embodiments of this application disclose an intra prediction method for a video sequence. The method includes: obtaining a size and a split mode of a chroma coding tree node; determining, based on the size and the split mode of the chroma coding tree node, whether to allow cross-component linear model (CCLM) intra prediction to be performed on a chroma coding unit included in the chroma coding tree node; determining a prediction mode of the chroma coding unit depending on whether to allow CCLM to be performed on the chroma coding unit; and processing the chroma coding unit based on the prediction mode of the chroma coding unit to obtain prediction samples of the chroma coding unit.
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55.发明公开公开(公告)号：US20240205387A1
公开(公告)日：2024-06-20
申请号：US18396191
申请日：2023-12-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Biao WANG , Anand Meher KOTRA , Semih ESENLIK , Han GAO , Jianle CHEN
IPC: H04N19/105 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
CPC classification number: H04N19/105 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
Abstract: Apparatuses and methods for encoding and decoding a video are provided. The method includes determining whether at least one of two blocks of an image in a video is predicted with a combined inter-intra prediction (CIIP), where the two blocks include a first block (block Q) and a second block (block P). There is a boundary between the two blocks. The method further includes setting a boundary strength (Bs) for the boundary to a first value when at least one of the two blocks is predicted with the CHIP, and performing deblocking filter based on the Bs.
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Patent Agency Ranking
公开(公告)号：US20240171773A1
公开(公告)日：2024-05-23
申请号：US18427084
申请日：2024-01-30
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/593 , H04N19/105 , H04N19/167 , H04N19/176 , H04N19/186
CPC classification number: H04N19/593 , H04N19/105 , H04N19/167 , H04N19/176 , H04N19/186
Abstract: Apparatuses and methods for encoding and decoding are provided. The method for intra predicting a chroma sample of a block by applying cross-component linear model includes: obtaining reconstructed luma samples; determining maximum and minimum luma sample values based on the reconstructed luma samples; obtaining a difference of the maximum and minimum luma sample values. The method also includes: fetching a value out of a lookup table (LUT) by using a set of bits as an index, the set of bits following a position of the most-significant bit; obtaining linear model parameters based on the fetched value; and calculating a predicted chroma sample value by using the obtained linear model parameters. The efficiency to fetch the value out of the LUT is increased.
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公开(公告)号：US20240121433A1
公开(公告)日：2024-04-11
申请号：US18533506
申请日：2023-12-08
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/593 , H04N19/11 , H04N19/159 , H04N19/172 , H04N19/186
CPC classification number: H04N19/593 , H04N19/11 , H04N19/159 , H04N19/172 , H04N19/186
Abstract: Devices and methods of directional intra prediction for chroma component of a picture are provided. The method includes obtaining an initial intra prediction mode of the chroma component, and deriving a chroma intra prediction mode (intraPredModeC) from a look up table (LUT) by using the initial intra prediction mode of the chroma component. The chroma component has different subsampling ratios in horizontal and vertical directions. The method further includes performing wide-angle mapping on the chroma intra prediction mode (intraPredModeC) to obtain a modified intraPredModeC; obtaining an angle parameter for the chroma component based on the modified intraPredModeC; and obtaining predicted samples of the chroma component based on the angle parameter. The method provides the minimum number of entries in the LUT that is used to determine chroma intra prediction mode from the initial chroma intra prediction mode.
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公开(公告)号：US20230353760A1
公开(公告)日：2023-11-02
申请号：US18206770
申请日：2023-06-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Roman Igorevich CHERNYAK , Yin ZHAO , Sergey Yurievich IKONIN , Jianle CHEN
IPC: H04N19/70 , H04N19/176 , H04N19/186 , H04N19/44 , H04N19/60
CPC classification number: H04N19/186 , H04N19/176 , H04N19/44 , H04N19/60 , H04N19/70
Abstract: A method comprising obtaining a bitstream, the bitstream comprises a transform unit syntax and a coding unit syntax, the transform unit syntax includes a value of a first flag and a value of a second flag related to, respectively, a first chroma transform block and a second chroma transform block of a current transform unit or a current sub-transform unit within the current transform unit, the first or second flag specifies whether the first or second chroma transform block contains at least one transform coefficient levels not equal to 0, the coding unit syntax includes a value of a third flag specifying whether a transform tree structure is present or not; and deriving a value of a fourth flag based on the values of the first, second, and third flags, the fourth flag specifies whether a luma transform block contains at least one transform coefficient levels not equal to 0.
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公开(公告)号：US20230319270A1
公开(公告)日：2023-10-05
申请号：US18191267
申请日：2023-03-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/184 , H04N19/503 , H04N19/593
CPC classification number: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/184 , H04N19/503 , H04N19/593
Abstract: Methods and devices for intra-prediction of a current block in video encoding or decoding are provided. A method includes: performing intra-prediction processing of the current block according to a directional intra-prediction mode, including applying reference sample filtering or subpixel interpolation filtering to reference samples in one or more reference blocks, wherein the directional intra-prediction mode is classified into one of the following groups: (A) vertical or horizontal modes, (B) directional modes including diagonal modes that represent angles which are multiples of 45 degrees, (C) remaining directional modes; if the directional intra-prediction mode is classified as belonging to group B, a reference sample filter is applied to the reference samples; if the directional intra-prediction mode is classified as belonging to group C, an intra reference sample interpolation filter is applied to the reference samples.
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公开(公告)号：US20230217025A1
公开(公告)日：2023-07-06
申请号：US18168188
申请日：2023-02-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Han GAO , Semih ESENLIK , Jianle CHEN , Zhijie ZHAO , Anand Meher KOTRA , Biao WANG
IPC: H04N19/119 , H04N19/176 , H04N19/96 , H04N19/70
CPC classification number: H04N19/119 , H04N19/176 , H04N19/96 , H04N19/70
Abstract: The present disclosure relates to methods and devices to be employed for encoding and decoding of image or video signal. They include determination of whether or not the size of a current block is larger than a minimum allowed quadtree leaf node size. If the size of the current block is not larger than the minimum allowed quadtree leaf node size, multi-type tree splitting is applied to the current block. The minimum allowed quadtree leaf node size is not larger than a maximum allowed binary tree root node size or the minimum allowed quadtree leaf node size is not larger than a maximum allowed ternary tree root node size.
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