公开(公告)号：US12289455B2

公开(公告)日：2025-04-29

申请号：US18581610

申请日：2024-02-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Fan Mu ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining chroma values of chroma samples; obtaining, luma values of luma samples corresponding to the chroma samples; obtaining, from the luma values, a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in the linear model; and determining prediction information of the chroma block based on the scaling coefficient and the offset factor.

公开(公告)号：US20210329261A1

公开(公告)日：2021-10-21

申请号：US17365372

申请日：2021-07-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Fan Mu ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/176

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining chroma values of chroma samples; obtaining, luma values of luma samples corresponding to the chroma samples; obtaining, from the luma values, a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in the linear model; and determining prediction information of the chroma block based on the scaling coefficient and the offset factor.

公开(公告)号：US12058362B2

公开(公告)日：2024-08-06

申请号：US17389873

申请日：2021-07-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao Yang ,  Fan Mu ,  Xiang Ma ,  Huanbang Chen ,  Lian Zhang

IPC: H04N19/51 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/51 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: The inter prediction method is provided, which includes: obtaining a predicted sample value of a current affine block; determining one or more luminance compensation blocks based on motion vectors of one or more subblocks of the current affine block; determining a linear model coefficient based on a first sample set and a second sample set, where the first sample set includes at least one reconstructed sample neighboring to an edge of the current affine block, the second sample set includes at least one reconstructed sample neighboring to an edge of the one or more luminance compensation blocks, and the sample in the first sample set is in a one-to-one correspondence with the sample in the second sample set; and updating the predicted sample value of the current affine block based on the linear model coefficient, to obtain an updated predicted sample value of the current affine block.

公开(公告)号：US11943451B2

公开(公告)日：2024-03-26

申请号：US17365372

申请日：2021-07-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Fan Mu ,  Yin Zhao ,  Haitao Yang

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/159 ,  H04N19/132 ,  H04N19/176

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining chroma values of chroma samples; obtaining, luma values of luma samples corresponding to the chroma samples; obtaining, from the luma values, a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in the linear model; and determining prediction information of the chroma block based on the scaling coefficient and the offset factor.

公开(公告)号：US11601667B2

公开(公告)日：2023-03-07

申请号：US17337556

申请日：2021-06-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haitao Yang ,  Fan Mu ,  Lian Zhang ,  Xiang Ma

IPC: H04N11/02 ,  H04N19/51 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184

Abstract: This application provides an example inter prediction method and a related example apparatus. One example method includes parsing a bitstream to determine prediction information of a to-be-processed picture block, where the prediction information indicates that a prediction direction of the to-be-processed picture block is bidirectional prediction, where the bitstream does not include target identification information, and where the target identification information indicates to perform local illumination compensation (LIC) on the to-be-processed picture block; and obtaining a prediction value of the to-be-processed picture block based on the prediction information.