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    ENCODER, A DECODER AND CORRESPONDING METHODS FOR INTER-PREDICTION
    151.
    发明申请
    ENCODER, A DECODER AND CORRESPONDING METHODS FOR INTER-PREDICTION 有权

    公开(公告)号：US20250088660A1

    公开(公告)日：2025-03-13

    申请号：US18959653

    申请日：2024-11-26

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Semih Esenlik ,  Han Gao ,  Anand Meher Kotra ,  Biao Wang ,  Jianle Chen

    IPC: H04N19/56 ,  H04N19/57 ,  H04N19/61

    Abstract: A non-transitory computer-readable medium for inter-prediction and an encoder are provided. An initial motion vector is obtained for a current block. Search space positions are determined according to the initial motion vector. Matching costs for the search space positions are checked according to a checking order to select a target search space position with a minimal matching cost. A refining motion vector of the current block is determined based on the initial motion vector and the target search space position. A central search space position is determined according to the checking order, and the central search space position is pointed to by the initial motion vector.

    Performing chroma deblocking for blocks which use joint chroma coding
    153.
    发明授权
    Performing chroma deblocking for blocks which use joint chroma coding 有权

    公开(公告)号：US12238289B2

    公开(公告)日：2025-02-25

    申请号：US18349988

    申请日：2023-07-11

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Anand Meher Kotra ,  Elena Alexandrovna Alshina ,  Semih Esenlik ,  Biao Wang ,  Han Gao ,  Roman Igorevich Chernyak

    IPC: H04N19/117 ,  H04N19/124 ,  H04N19/176 ,  H04N19/186

    Abstract: A method for deblocking a chroma block edge between a first chroma block of a first image block and a second chroma block of a second image block. The method includes a decision process which includes: determining a first chroma quantization parameter for the first chroma block based on a first luma quantization parameter of a first luma block of the first image block and a chroma QP mapping table for the first chroma block; determining a second chroma quantization parameter for the second chroma block based on a second luma quantization parameter of a second luma block of the second image block and a chroma QP mapping table for the second chroma block; determining an averaged and rounded chroma quantization parameter based on the first chroma quantization parameter and the second chroma quantization parameter; and determining a threshold parameter based on the averaged and rounded chroma quantization parameter.

    LIMITED MEMORY ACCESS WINDOW FOR MOTION VECTOR REFINEMENT
    155.
    发明申请
    LIMITED MEMORY ACCESS WINDOW FOR MOTION VECTOR REFINEMENT 有权

    公开(公告)号：US20250016354A1

    公开(公告)日：2025-01-09

    申请号：US18777829

    申请日：2024-07-19

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Semih Esenlik ,  Anand Meher Kotra ,  Zhijie Zhao ,  Han Gao

    IPC: H04N19/513 ,  H04N19/57

    Abstract: The present disclosure relates to motion vector refinement. As a first step, an initial motion vector and a template for the block are obtained. Then, the refinement of the initial motion vector is determined by template matching with said template in a search space. The search space is located on a position given by the initial motion vector and includes one or more fractional sample positions, wherein each of the fractional sample positions belonging to the search space is obtained by interpolation filtering with a filter of a predefined tap-size assessing integer samples only within a window, said window being formed by integer samples accessible for the template matching in said search space.

    Deblocking filter for sub-partition boundaries caused by intra sub-partition coding tool
    156.
    发明授权
    Deblocking filter for sub-partition boundaries caused by intra sub-partition coding tool 有权

    公开(公告)号：US12167038B2

    公开(公告)日：2024-12-10

    申请号：US18455636

    申请日：2023-08-25

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Biao Wang ,  Anand Meher Kotra ,  Semih Esenlik ,  Han Gao ,  Jianle Chen

    IPC: H04N19/80 ,  H04N19/117 ,  H04N19/176 ,  H04N19/593 ,  H04N19/66

    Abstract: A deblocking method is provided for deblocking a sub-partition boundary within a coding block during image encoding and/or image decoding process. The coding block is coded in an intra prediction mode and the coding block is partitioned into sub-partitions comprising a first sub-partition and a second sub-partition that is adjacent to the first sub-partition. The method comprises: determining a maximum filter length to be 1 for a first/second sub-partition when a width of the first or second sub-partition is 4 samples, or when a height of the first or second sub-partition is 4 samples; modifying a value of up to one sample of the first or second sub-partition, wherein the value of the up to one sample is obtained from a row or a column of the first or second sub-partition that is perpendicular to and adjacent to the sub-partitions boundary between the first sub-partition and the second sub-partition.

    Coding method, device, system with merge mode
    158.
    发明授权
    Coding method, device, system with merge mode 有权

    公开(公告)号：US12149680B2

    公开(公告)日：2024-11-19

    申请号：US17830782

    申请日：2022-06-02

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Semih Esenlik ,  Han Gao ,  Anand Meher Kotra ,  Biao Wang ,  Elena Alexandrovna Alshina

    IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/96

    Abstract: Parallel processing of inter prediction of a current coding block and preceding coding blocks depending on the partition depth of the current coding block is disclosed. An apparatus comprises a processing circuitry configured for: obtaining a value of a parameter for the current coding block, wherein the value of the parameter indicates a partition depth of the current coding block, and performing an inter prediction process for the current coding block; wherein no Motion Vector Predictor candidate comprising a motion vector of a coded block of the picture that is not spatially adjacent to the current coding block for the current coding block is used in the inter prediction process or a merge mode inter prediction process comprised in the inter prediction process, when the value of the parameter for the current coding block is greater than a threshold.

    Encoder, a decoder and corresponding methods using IBC merge list
    159.
    发明授权
    Encoder, a decoder and corresponding methods using IBC merge list 有权

    公开(公告)号：US12015797B2

    公开(公告)日：2024-06-18

    申请号：US18080903

    申请日：2022-12-14

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Han Gao ,  Semih Esenlik ,  Biao Wang ,  Anand Meher Kotra ,  Jianle Chen

    IPC: H04N19/176 ,  H04N19/513

    CPC classification number: H04N19/513 ,  H04N19/176

    Abstract: The present disclosure provides methods and devices of construct a candidate merge list for Intra block copy (IBC) mode, the method comprising: inserting a block vector of a left neighboring block of a current block into an initial merge list, when the left neighboring block is available and the left neighboring block is using IBC mode; inserting a block vector of an above neighboring block of the current block into the initial merge list, when the above neighboring block is available, the above neighboring block is using IBC mode and the block vector of the above neighboring block is not same as the block vector of the left neighboring block; inserting a block vector of the last candidate in a history based motion vector predictor (HMVP) into the initial merge list; obtaining a block vector of the current block according to the initial merge list.

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