公开(公告)号：US20240195984A1

公开(公告)日：2024-06-13

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: H04N19/159 ,  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：US20210360275A1

公开(公告)日：2021-11-18

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 ,  H04N19/159 ,  H04N19/132 ,  H04N19/105 ,  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：US20210289224A1

公开(公告)日：2021-09-16

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: H04N19/51 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184

Abstract: This application provides an inter prediction method and a related apparatus. The method includes: parsing a bitstream to determine prediction information of a to-be-processed picture block, where when the prediction information indicates that a prediction direction of the to-be-processed picture block is bidirectional prediction, the bitstream does not include target identification information, where the target identification information is used to indicate 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. According to the foregoing technical solutions, a video decoding speed can be accelerated without greatly affecting video quality.