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    Colour component prediction method, encoder, decoder and storage medium
    2.
    发明授权
    Colour component prediction method, encoder, decoder and storage medium 有权

    公开(公告)号：US12200199B2

    公开(公告)日：2025-01-14

    申请号：US18449877

    申请日：2023-08-15

    Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

    Inventor： Junyan Huo ,  Shuai Wan ,  Yanzhuo Ma

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

    Abstract: Disclosed are a colour component prediction method, an encoder, a decoder, and a storage medium. The method includes: determining adjacent reference pixels of a current block in a picture; constructing a subset of adjacent reference pixels according to the adjacent reference pixels, wherein the subset of adjacent reference pixels contains a part of the adjacent reference pixels; and calculating model parameters of a prediction model according to the subset of adjacent reference pixels, wherein the prediction model includes N prediction sub-models, the N prediction sub-models correspond to N groups of model parameters, and the prediction sub-models are used to perform, through corresponding model parameters, cross-component prediction of colour components to be predicted.

    Methods for level partition of point cloud, and decoder
    6.
    发明授权
    Methods for level partition of point cloud, and decoder 有权

    公开(公告)号：US11983905B2

    公开(公告)日：2024-05-14

    申请号：US18128227

    申请日：2023-03-30

    Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

    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.

    Methods for intra prediction, encoder and decoder
    9.
    发明授权
    Methods for intra prediction, encoder and decoder 有权

    公开(公告)号：US11882293B2

    公开(公告)日：2024-01-23

    申请号：US17721321

    申请日：2022-04-14

    Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

    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.

    Methods for intra prediction, encoder and decoder
    10.
    发明授权
    Methods for intra prediction, encoder and decoder 有权

    公开(公告)号：US11831882B2

    公开(公告)日：2023-11-28

    申请号：US17721228

    申请日：2022-04-14

    Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

    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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