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    BI-PREDICTION WITH SAMPLE ADAPTIVE WEIGHTS
    1.
    发明申请
    BI-PREDICTION WITH SAMPLE ADAPTIVE WEIGHTS 有权

    公开(公告)号：US20250150578A1

    公开(公告)日：2025-05-08

    申请号：US19016699

    申请日：2025-01-10

    Applicant: TENCENT AMERICA LLC

    Inventor： Madhu Peringassery KRISHNAN ,  Xin ZHAO ,  Liang ZHAO ,  Han GAO ,  Xiaozhong XU ,  Shan LIU

    IPC: H04N19/105 ,  H04N19/137 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46

    Abstract: A method includes receiving a current picture, a first reference picture, and a second reference picture. The method includes obtaining a plurality of predefined weighting patterns, each weighting pattern being signaled as an index value and selecting a weighting pattern based on a predetermined condition. The method includes deriving a first weight to be applied to a first sub-block in the first reference picture and a second weight to be applied to a second sub-block in the second reference picture based on the index value corresponding to the selected weighting pattern. The method includes assigning the first weight to the first sub-block and the second weight to the second sub-block based on the selected weighting pattern. The method includes decoding the current block by a weighted bi-prediction based at least on the first sub-block weighted by the first weight and the second sub-block weighted by the second weight.

    FLEXIBLE TRANSFORM SCHEME FOR RESIDUAL BLOCKS
    2.
    发明申请
    FLEXIBLE TRANSFORM SCHEME FOR RESIDUAL BLOCKS 有权

    公开(公告)号：US20250119583A1

    公开(公告)日：2025-04-10

    申请号：US18480973

    申请日：2023-10-04

    Applicant: Tencent America LLC

    Inventor： Tianqi LIU ,  Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

    IPC: H04N19/61 ,  H04N19/12 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method of video decoding includes receiving video data including a first block and a syntax element, from a video bitstream, where the syntax element is signaled at a first processing unit level. The method further includes selecting a transform coding mode based on the syntax element and performing a transform process for the first block using the selected transform coding mode, where the transform process is performed on a transform block at a second processing unit level, and where the second processing unit level is not signaled (e.g., is inferred from coded information).

    EXTENDED DIRECTIONAL PREDICTIONS FOR RESIDUAL BLOCKS
    3.
    发明申请
    EXTENDED DIRECTIONAL PREDICTIONS FOR RESIDUAL BLOCKS 有权

    公开(公告)号：US20250119576A1

    公开(公告)日：2025-04-10

    申请号：US18480966

    申请日：2023-10-04

    Applicant: Tencent America LLC

    Inventor： Tianqi LIU ,  Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

    IPC: H04N19/593 ,  H04N19/176 ,  H04N19/91

    Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method of video decoding includes receiving video data comprising a plurality of blocks, including a first block and a plurality of residual coefficients, from a video bitstream. The first block is encoded by applying a first intra prediction. The plurality of residual coefficients are generated by applying a second intra prediction to a residue block for the first block in a first direction. The residue block generated from applying the first intra prediction mode to the first block in a second direction. The method also includes generating, from the plurality of residual coefficients, a refined residue block for the first block, and reconstructing the first block using the refined residue block.

    BLOCK ADAPTIVE MULTI-HYPOTHESIS CROSS COMPONENT PREDICTION
    4.
    发明申请
    BLOCK ADAPTIVE MULTI-HYPOTHESIS CROSS COMPONENT PREDICTION 有权

    公开(公告)号：US20250080763A1

    公开(公告)日：2025-03-06

    申请号：US18497915

    申请日：2023-10-30

    Applicant: Tencent America LLC

    Inventor： Jing YE ,  Xin ZHAO ,  Liang ZHAO ,  Han GAO ,  Shan LIU

    IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

    Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current coding block of an image frame and signals a cross-component intra prediction mode and a hypothesis tap index. An computing system identifies a first luma sample and a first chroma sample co-located with the first luma sample in the current coding block, and selects one of a plurality of hypothesis tap combinations based on the hypothesis tap index. The computing system identifies neighboring luma samples of the first luma sample based on the selected hypothesis tap combinations, and generates hypothesis values based on the identified neighboring luma samples of the first luma sample. The computing system further generates the first chroma sample based on at least the first luma sample and the hypothesis values, and reconstructs the current coding block including the first chroma sample.

    IMPROVEMENT FOR EXPLICIT SIGNALING OF BLOCK BASED ADAPTIVE WEIGHTED PREDICTION
    6.
    发明申请
    IMPROVEMENT FOR EXPLICIT SIGNALING OF BLOCK BASED ADAPTIVE WEIGHTED PREDICTION 有权

    公开(公告)号：US20240373055A1

    公开(公告)日：2024-11-07

    申请号：US18461759

    申请日：2023-09-06

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Han GAO ,  Jing YE ,  Shan LIU

    IPC: H04N19/513 ,  H04N19/176

    Abstract: This disclosure relates generally to video coding/decoding and particularly for enhancing BAWP. One method includes receiving a video bitstream comprising a current block and a reference block, the reference block being used for predicting the current block and being identified by a motion vector associated with the current block; receiving a first syntax element indicating a scale factor, the scale factor being stored in a lookup table among two or more lookup tables maintained by the decoder for storing candidate scale factors or candidate scale factor differences, the candidate scale factor differences being differences between the candidate scale factors and a threshold value; selecting the lookup table; determining the scale factor based on the first syntax element and the selected lookup table; predicting the current block based on the reference block, the scale factor, and an offset; and reconstructing the current block based on the predicted current block.

    ANGULAR INTRA PREDICTION
    7.
    发明公开
    ANGULAR INTRA PREDICTION 审中-公开

    公开(公告)号：US20240298022A1

    公开(公告)日：2024-09-05

    申请号：US18215321

    申请日：2023-06-28

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

    IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

    CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

    Abstract: Coded information of a current block and a plurality of reference lines of the current block is received. A first offset value is determined in a first mapping table and associated with a first reference line of the plurality of reference lines that is adjacent to the current block. A second offset value is determined in a second mapping table and associated with a second reference line of the plurality of reference lines that is adjacent to the first reference line. A first reference sample for a sample of the current block is determined from the first reference line based on the first offset value. A second reference sample for the sample of the current block is determined from the second reference line based on the second offset value. The sample of the current block is reconstructed based on one of the first reference sample and the second reference sample.

    SELF-GUIDED INTRA INTERPOLATION FILTER
    9.
    发明公开
    SELF-GUIDED INTRA INTERPOLATION FILTER 审中-公开

    公开(公告)号：US20240275959A1

    公开(公告)日：2024-08-15

    申请号：US18384759

    申请日：2023-10-27

    Applicant: Tencent America LLC

    Inventor： Xin ZHAO ,  Liang ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

    IPC: H04N19/117 ,  H04N19/11 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593

    CPC classification number: H04N19/117 ,  H04N19/11 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593

    Abstract: The disclosure includes methods and apparatuses that includes processing circuitry that receives, from a bitstream comprising a current block in a picture, coding information of the bitstream indicating that the current block is coded in an angular intra prediction mode with an intra interpolation filter. The processing circuitry applies each of a predefined set of intra interpolation filters to neighboring reconstructed samples within N adjacent lines from a boundary of the current block. The processing circuitry selects one intra interpolation filter from the predefined set of intra interpolation filters based a prediction error associated with the each of the predefined set of intra interpolation filters and predicts a sample in the current block using the angular intra prediction mode using the selected one intra interpolation filter. The processing circuitry reconstructs the current block based on the predicted sample.

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