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    FILTER SHAPE SWITCHING
    11.
    发明申请
    FILTER SHAPE SWITCHING 有权

    公开(公告)号：US20250047907A1

    公开(公告)日：2025-02-06

    申请号：US18922219

    申请日：2024-10-21

    Applicant: Tencent America LLC

    Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/80 ,  H04N19/103 ,  H04N19/117 ,  H04N19/132 ,  H04N19/136 ,  H04N19/184 ,  H04N19/70

    Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. An example method of video decoding includes receiving a video bitstream and reconstructing a first sample of the video bitstream using a non-linear mapping-based filter with a first filter shape configuration of a plurality of filter shape configurations. The plurality of filter shape configurations includes at least two filter shape configurations that are based on a same geometric shape and include a same number of filter taps, and the filter taps of the at least two filter shape configurations are located at different positions. The method further includes selecting a second filter shape configuration of the plurality of filter shape configurations, and reconstructing a second sample in the video based on the non-linear mapping-based filter with the second filter shape configuration.

    ADAPTIVE RESOLUTION FOR SINGLE-REFERENCE MOTION VECTOR DIFFERENCE
    12.
    发明申请
    ADAPTIVE RESOLUTION FOR SINGLE-REFERENCE MOTION VECTOR DIFFERENCE 有权

    公开(公告)号：US20250047862A1

    公开(公告)日：2025-02-06

    申请号：US18920706

    申请日：2024-10-18

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/52 ,  H04N19/59 ,  H04N19/70

    Abstract: This disclosure relates to signaling, parsing, and using adaptive resolution for motion vector difference in video coding. An example method includes receiving a video bitstream and extracting an inter-prediction syntax element from the video bitstream. The inter-prediction syntax element indicates which single-reference inter-prediction mode is enabled for one or more video blocks of the video bitstream. The method further includes determining whether an adaptive motion vector difference (MVD) mode is enabled for the one or more video blocks. The adaptive MVD mode is a single-reference inter-prediction mode with an adaptive MVD pixel resolution. When the adaptive MVD mode is enabled for the one or more video blocks, the method includes selecting a current MVD pixel resolution from a set of available MVD pixel resolutions. The method also includes decoding the one or more video blocks based on the current MVD pixel resolution.

    JOINT COMPONENT SECONDARY TRANSFORM
    13.
    发明申请
    JOINT COMPONENT SECONDARY TRANSFORM 有权

    公开(公告)号：US20250039455A1

    公开(公告)日：2025-01-30

    申请号：US18916112

    申请日：2024-10-15

    Applicant: Tencent America LLC

    Inventor： Xin ZHAO ,  Sehoon YEA ,  Shan LIU

    IPC: H04N19/61 ,  H04N19/44 ,  H04N19/70 ,  H04N19/91

    Abstract: An example method of decoding an encoded video bitstream using at least one processor includes obtaining an encoded video bitstream, the encoded video bitstream including encoded color components. The method also includes entropy parsing the encoded color components and dequantizing the color components and obtaining transform coefficients of the color components. The method further includes applying a joint components secondary transform (JCST) on the transform coefficients of the color components, thereby generating JCST outputs. The method also includes performing a backward transform on the JCST outputs, thereby obtaining residual components of the color components; and decoding the encoded video bitstream based on the residual components of the color components.

    TEMPORAL MOTION VECTOR PREDICTOR WITH DISPLACEMENT
    14.
    发明申请
    TEMPORAL MOTION VECTOR PREDICTOR WITH DISPLACEMENT 有权

    公开(公告)号：US20250024066A1

    公开(公告)日：2025-01-16

    申请号：US18899595

    申请日：2024-09-27

    Applicant: TENCENT AMERICA LLC

    Inventor： Xin ZHAO ,  Guichun LI ,  Lien-Fei CHEN ,  Shan LIU

    IPC: H04N19/513 ,  H04N19/103 ,  H04N19/176 ,  H04N19/184

    Abstract: Method, apparatus, and non-transitory storage medium for coding and decoding video data using temporal motion vector prediction (TMVP) is provided. The method may include receiving video bitstream comprising one or more pictures; determining that the one or more pictures are to be predicted in a regular merge mode or an adaptive motion vector prediction (AMVP) mode. A displacement vector associated with a current block in a current picture is obtained, the displacement vector being signaled in the video bitstream to identify a reference block in the current picture. A TMVP candidate list comprising the motion information is generated and a motion vector for the current block using the TMVP candidate list is derived. Then the current block is decoded using the derived motion vector for prediction in the regular merge mode or the adaptive motion vector prediction (AMVP) mode.

    ADAPTIVE FILTER FOR DECODER-SIDE INTRA MODE DERIVATION
    15.
    发明申请
    ADAPTIVE FILTER FOR DECODER-SIDE INTRA MODE DERIVATION 有权

    公开(公告)号：US20250024031A1

    公开(公告)日：2025-01-16

    申请号：US18768879

    申请日：2024-07-10

    Applicant: Tencent America LLC

    Inventor： Biao WANG ,  Roman CHERNYAK ,  Xin ZHAO ,  Madhu PERINGASSERY KRISHNAN ,  Lien-Fei CHEN ,  Shan LIU

    IPC: H04N19/117 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

    Abstract: Aspects of the disclosure includes methods and apparatuses for video decoding and video encoding and a method of processing visual media data. The apparatus for video decoding includes processing circuitry that receives coded information indicating that a current block in a current picture is coded with a decoder-side intra mode derivation (DIMD) mode. A template of the current block includes reconstructed samples in the current picture and is adjacent to the current block. The template includes one of a left template and a top template. The processing circuitry determines a filter type from a plurality of filter types associated with the one of the left template and the top template, applies the DIMD mode to the template based on the determined filter type to determine one or more intra prediction modes for the current block, and reconstructs the current block according to the one or more intra prediction modes.

    IMPROVEMENT FOR EXPLICIT SIGNALING OF BLOCK BASED ADAPTIVE WEIGHTED PREDICTION
    16.
    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.

    CROSS-COMPONENT RESIDUAL PREDICTION BY USING RESIDUAL TEMPLATE
    19.
    发明公开
    CROSS-COMPONENT RESIDUAL PREDICTION BY USING RESIDUAL TEMPLATE 审中-公开

    公开(公告)号：US20240357097A1

    公开(公告)日：2024-10-24

    申请号：US18643953

    申请日：2024-04-23

    Applicant: Tencent America LLC

    Inventor： Lien-Fei CHEN ,  Xin ZHAO ,  Roman CHERNYAK ,  Xiaozhong XU ,  Shan LIU

    IPC: H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current image frame having a current coding block and signals a first syntax element for a residual template cross-component residual model (RT-CCRM) mode. When the RT-CCRM mode is enabled, the computing system identifies, in the current coding block, a first chroma sample and one or more luma samples corresponding to the first chroma sample, determines one or more residuals of the one or more luma samples in the current coding block, and applies a residual filter corresponding to the RT-CCRM mode to generate a first residual of the first chroma sample based on the residuals of the one or more luma samples. The computing system reconstructs the current image frame by compensating a predicted chroma sample with at least the first residual to reconstruct the first chroma sample.

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