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    Method and apparatus for intra prediction
    82.
    发明授权
    Method and apparatus for intra prediction 有权

    公开(公告)号：US11601653B2

    公开(公告)日：2023-03-07

    申请号：US17345449

    申请日：2021-06-11

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen

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

    Abstract: Apparatuses and methods for intra predicting a block are described. The method of intra predicting a current block can include obtaining a predicted sample value from one or more reference sample values by using an intra prediction mode, obtaining at least one additional reference sample value in accordance with the intra prediction mode, and obtaining a thresholded additional reference sample value based on the additional reference sample value. The method can also include calculating an additional value from the thresholded additional reference sample value, multiplying the predicted sample value by a sample weighting factor, resulting in a weighted predicted sample value, adding the additional value to the weighted predicted sample value, resulting in a non-normalized predicted sample value, and normalizing the non-normalized predicted sample value, resulting in a normalized predicted sample values. The accuracy for the intra prediction is thus increased.

    Method and apparatus for scan order selection
    83.
    发明授权
    Method and apparatus for scan order selection 有权

    公开(公告)号：US11582455B2

    公开(公告)日：2023-02-14

    申请号：US16100813

    申请日：2018-08-10

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy

    IPC: H04N19/129 ,  H04N19/176 ,  H04N19/70 ,  H04N19/136 ,  H04N19/18 ,  H04N19/44 ,  H04N19/64

    Abstract: The disclosure proposes a decoder for decoding coefficients of blocks of a video sequence from a bitstream. The decoder comprises a scan pattern list module for providing one or more pre-defined scan orders, a scan order generator for generating one or more scan orders, a scan order selector for selecting a scan order for each block from the pre-defined and generated scan orders on the basis of scan order information contained in the bitstream, a decoding module for decoding one or more coefficient vectors of each block from the bitstream, a deserializer for inverse scanning, for each block, the one or more coefficient vectors of that block according to the scan order selected for that block so as to obtain a coefficient matrix. The scan order generator generates the one or more scan orders depending on one or more previously obtained coefficient matrices of blocks of the video sequence.

    Method of intra predicting a block of a picture
    84.
    发明授权
    Method of intra predicting a block of a picture 有权

    公开(公告)号：US11553174B2

    公开(公告)日：2023-01-10

    申请号：US17328352

    申请日：2021-05-24

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen

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

    Abstract: The present disclosure provides methods and devices of intra predicting a block of a picture. The method comprises for a sample of the block: obtaining a predicted sample value from one or more reference sample values by performing intra-prediction using a DC intra-prediction mode; multiplying the predicted sample value by a sample weighting factor to produce a weighted predicted sample value; adding an additional value to the weighted predicted sample value to produce a non-normalized predicted sample value; and normalizing the non-normalized predicted sample value by an arithmetic right shift; wherein the sample weighting factor is ((2

    Method and apparatus for intra prediction
    85.
    发明授权
    Method and apparatus for intra prediction 有权

    公开(公告)号：US11503335B2

    公开(公告)日：2022-11-15

    申请号：US17200470

    申请日：2021-03-12

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy

    IPC: H04N19/593 ,  H04N19/159 ,  H04N19/176

    Abstract: A method for constructing a Most Probable Mode (MPM) list is provided. The method comprising: obtaining an intra prediction mode of a neighbor block adjacent to a current block; if the intra prediction mode of the neighbor block is not comprised in the MPM list and the intra prediction mode of the neighbor block is a directional (for example, angular) intra prediction mode, determining a quantity of predicted samples (N) of the current block according to positions of a set of reference samples on a boundary of the current block, N is an integer; if the N is greater than or equal to a threshold (for example, a first threshold), adding the intra prediction mode of the neighbor block into the MPM list.

    Method and apparatus for interpolation filtering for intra- and inter-prediction in video coding
    89.
    发明授权
    Method and apparatus for interpolation filtering for intra- and inter-prediction in video coding 有权

    公开(公告)号：US11405612B2

    公开(公告)日：2022-08-02

    申请号：US17142170

    申请日：2021-01-05

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Alexey Konstantinovich Filippov ,  Jianle Chen ,  Vasily Alexeevich Rufitskiy

    IPC: H04N19/117 ,  H04N19/176

    Abstract: A method of video coding, wherein the method comprises inter-prediction processing of a first block, wherein the inter-prediction processing comprises subpixel interpolation filtering of samples of a reference block; intra-prediction processing of a second block, wherein the intra-prediction processing comprises subpixel interpolation filtering of reference samples; wherein the method further comprises selecting interpolation filter coefficients for the subpixel interpolation filtering based on a subpixel offset between integer reference sample positions and fractional reference samples' positions, wherein for the same subpixel offsets the same interpolation filter coefficients are selected for intra-prediction processing and inter-prediction processing.

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