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公开(公告)号：US12069276B2
公开(公告)日：2024-08-20
申请号：US18131065
申请日：2023-04-05
Inventor： Junyan Huo , Yanzhuo Ma , Jianglin Wang , Shuai Wan , Fuzheng Yang
IPC: H04N19/137 , H04N19/159 , H04N19/176 , H04N19/186
CPC classification number: H04N19/137 , H04N19/159 , H04N19/176 , H04N19/186
Abstract: Provided are a method for determining a prediction direction, a decoder and a computer storage medium. The method is implemented by a decoder. The method includes that: a Direct Mode (DM) in a chroma intra prediction mode of a block to be decoded is acquired (S101); and an index number of a prediction direction in a DM derived mode is determined based on an offset N and an index number M of a prediction direction in the DM to determine the DM derived mode (S102).
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公开(公告)号：US12058373B2
公开(公告)日：2024-08-06
申请号：US17807671
申请日：2022-06-17
Inventor： Junyan Huo , Xinwei Li , Wenhan Qiao , Yanzhuo Ma , Shuai Wan , Fuzheng Yang
IPC: H04N19/61 , H04N19/12 , H04N19/129 , H04N19/159 , H04N19/176
CPC classification number: H04N19/61 , H04N19/12 , H04N19/129 , H04N19/159 , H04N19/176
Abstract: A transform method applied to an encoder includes: determining a prediction mode parameter of a current block; determining a CCLM parameter when the prediction mode parameter indicates that CCLM is used for the current block to determine an intra prediction value; determining the intra prediction value of the current block according to the CCLM parameter and calculating a residual value between the current block and the intra prediction value; performing a first transform on the residual value to obtain a first coefficient matrix; determining an LFNST coefficient scanning order used for the current block according to the CCLM parameter when an LFNST is used for the current block; constructing an input coefficient matrix of the LFNST by using the first coefficient matrix according to the LFNST coefficient scanning order; and performing an LFNST processing on the input coefficient matrix to obtain a transform coefficient matrix of the current block.
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公开(公告)号：US11983905B2
公开(公告)日：2024-05-14
申请号：US18128227
申请日：2023-03-30
Inventor： Shuai Wan , Lei Wei , Fuzheng Yang , Xiaobin Ding
IPC: G06T9/00
CPC classification number: G06T9/001
Abstract: A method for level partition of a point cloud includes: decoding a point cloud bitstream, the point cloud bitstream including geometry information and attribute information of the point cloud; determining a maximum permissible value of a first syntax element in the point cloud bitstream; parsing the point cloud bitstream to determine a value of the first syntax element according to the maximum permissible value; determining, according to the value of the first syntax element, a number of levels of detail (LODs) in a process of decoding the attribute information; and decoding the attribute information according to the number of the LODs and the geometry information, to determine a reconstructed point cloud of the point cloud.
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公开(公告)号：US11962802B2
公开(公告)日：2024-04-16
申请号：US17715468
申请日：2022-04-07
Inventor： Junyan Huo , Yanzhuo Ma , Shuai Wan , Fuzheng Yang , Jinkun Guo
IPC: H04N19/11 , H04N19/136 , H04N19/176 , H04N19/593
CPC classification number: H04N19/593 , H04N19/11 , H04N19/136 , H04N19/176
Abstract: An intra prediction method and device and a computer-readable storage medium, the method comprising: configuring actual angle modes indicated by relative angle numbers, wherein the relative angle numbers are successively represented within a prediction direction range corresponding to a preset width and height relationship; starting from a starting angle, using a corresponding actual angle mode after sampling preset angle sample points, said starting angle being determined according to the width and height relationship of processing blocks and the prediction direction range corresponding to the preset width and height relationship, and actual angles having a one-to-one correspondence with the actual angle modes.
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公开(公告)号：US11936909B2
公开(公告)日：2024-03-19
申请号：US17655353
申请日：2022-03-17
Inventor： Wei Zhang , Fuzheng Yang , Shuai Wan , Junyan Huo , Yanzhuo Ma , Lihui Yang , Na Dai , Sujun Zhang
IPC: H04N19/597 , H04N19/119 , H04N19/124 , H04N19/176 , H04N19/186
CPC classification number: H04N19/597 , H04N19/119 , H04N19/124 , H04N19/176 , H04N19/186
Abstract: A prediction method, an encoder, a decoder, and a computer storage medium are provided. The prediction method applied to an encoder includes: determining a spatial block in which an encoding point is located; constructing a prediction model according to the spatial block; acquiring a value of a first colour component and a value of a second colour component of the encoding point; obtaining a prediction value of the second colour component of the encoding point by using the prediction model and the value of the first colour component; calculating a difference between the value of the second colour component and the prediction value of the second colour component, and using the obtained difference as a residual of the encoding point; and performing Level of Detail (LOD) partitioning and lifting transform based on the residual of the encoding point.
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Patent Agency Ranking
公开(公告)号：US11882293B2
公开(公告)日：2024-01-23
申请号：US17721321
申请日：2022-04-14
Inventor： Yanzhuo Ma , Junyan Huo , Shuai Wan , Fuzheng Yang , Ze Guo , Xinwei Li
IPC: H04N19/176 , H04N19/159 , H04N19/105 , H04N19/132
CPC classification number: H04N19/159 , H04N19/105 , H04N19/132 , H04N19/176
Abstract: A method for intra prediction includes: obtaining multiple previously reconstructed neighbouring blocks corresponding to a current processing block; determining prediction modes, that are signalled in a bitstream, corresponding to neighbouring blocks of the multiple previously reconstructed neighbouring blocks, to obtain multiple first prediction modes; if the multiple first prediction modes comprise at least two directional modes, taking directional modes comprised in the multiple first prediction modes as first prediction directions; performing, according to a preset operation rule, operation on multiple first prediction directions of the first prediction directions to obtain second prediction directions; obtaining a prediction mode set according to the second prediction directions and the multiple first prediction modes; and performing intra prediction on the current processing block based on the prediction mode set.
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公开(公告)号：US11831882B2
公开(公告)日：2023-11-28
申请号：US17721228
申请日：2022-04-14
Inventor： Yanzhuo Ma , Junyan Huo , Shuai Wan , Fuzheng Yang , Ze Guo , Xinwei Li
IPC: H04N19/105 , H04N19/159 , H04N19/132 , H04N19/176
CPC classification number: H04N19/159 , H04N19/105 , H04N19/132 , H04N19/176
Abstract: A method for intra prediction includes: obtaining multiple previously reconstructed neighbouring blocks corresponding to a current processing block; determining prediction modes, that are signalled in a bitstream, corresponding to neighbouring blocks of the multiple previously reconstructed neighbouring blocks, to obtain multiple first prediction modes; if the multiple first prediction modes comprise at least two directional modes, taking directional modes comprised in the multiple first prediction modes as first prediction directions; performing, according to a preset operation rule, operation on multiple first prediction directions of the first prediction directions to obtain second prediction directions; obtaining a prediction mode set according to the second prediction directions and the multiple first prediction modes; and performing intra prediction on the current processing block based on the prediction mode set.
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公开(公告)号：US11812057B2
公开(公告)日：2023-11-07
申请号：US17365869
申请日：2021-07-01
Inventor： Junyan Huo , Yanzhuo Ma , Fuzheng Yang , Shuai Wan , Xiaoyan Chai
IPC: H04N19/593 , H04N19/105 , H04N19/11 , H04N19/136 , H04N19/176
CPC classification number: H04N19/593 , H04N19/105 , H04N19/11 , H04N19/136 , H04N19/176
Abstract: An intra prediction method and device and a computer storage medium are provided. The intra prediction method includes that: a width-to-height radio of a present coding block and a width-to-height radio of a reference block are acquired, the reference block being a coding block correlated with the present coding block (S101); when the width-to-height radio of the present coding block is different from the width-to-height radio of the reference block, an angular replacement prediction mode corresponding to the reference block is adjusted to obtain a adjusted angular replacement prediction mode, the angular replacement prediction mode being an extended angular prediction mode under a wide-angle mode (S102); and a prediction mode list of the present coding block is constructed based on the adjusted angular replacement prediction mode for intra prediction of the present coding block (S103).
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公开(公告)号：US11805276B2
公开(公告)日：2023-10-31
申请号：US17715390
申请日：2022-04-07
Inventor： Junyan Huo , Yanzhuo Ma , Shuai Wan , Fuzheng Yang , Jinkun Guo
IPC: H04N19/11 , H04N19/136 , H04N19/593 , H04N19/176
CPC classification number: H04N19/593 , H04N19/11 , H04N19/136 , H04N19/176
Abstract: An intra prediction method and device and a computer-readable storage medium, the method comprising: configuring actual angle modes indicated by relative angle indices, wherein the relative angle indices are successively represented within a prediction direction range corresponding to a preset width and height relationship; starting from a starting angle, using a corresponding actual angle mode after sampling preset angle sample points, said starting angle being determined according to the width and height relationship of processing blocks and the prediction direction range corresponding to the preset width and height relationship, and actual angles having a one-to-one correspondence with the actual angle modes.
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公开(公告)号：US11790563B2
公开(公告)日：2023-10-17
申请号：US17563391
申请日：2021-12-28
Inventor： Wei Zhang , Fuzheng Yang , Shuai Wan , Yanzhuo Ma , Junyan Huo , Zexing Sun , Sujun Zhang
CPC classification number: G06T9/001 , G06T7/11 , G06T9/40 , G06T17/00 , G06T2207/10028
Abstract: A point cloud model reconstruction method, an encoder, and a decoder are provided. The method includes the following. An i-th segmentation position of an i-th three-dimensional slice on a longest edge in a point cloud space is obtained, where 1≤i≤n−1 and n is a total number of three-dimensional slices to-be-processed. An i-th cube block set nearest to the i-th segmentation position in the i-th three-dimensional slice is determined based on the i-th segmentation position and a preset cube block length. An i-th vertex position with a cube block in the i-th cube block set is determined along the longest edge, where the i-th vertex position represents a position of a vertex on an edge which is away from a start position of the cube block by the preset cube block length. A point cloud model is reconstructed based on the i-th vertex position.
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