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    LIMITED MEMORY ACCESS WINDOW FOR MOTION VECTOR REFINEMENT
    51.
    发明申请
    LIMITED MEMORY ACCESS WINDOW FOR MOTION VECTOR REFINEMENT 有权

    公开(公告)号：US20220400282A1

    公开(公告)日：2022-12-15

    申请号：US17849405

    申请日：2022-06-24

    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.

    PERFORMING CHROMA DEBLOCKING FOR BLOCKS WHICH USE JOINT CHROMA CODING
    55.
    发明申请
    PERFORMING CHROMA DEBLOCKING FOR BLOCKS WHICH USE JOINT CHROMA CODING 有权

    公开(公告)号：US20220191496A1

    公开(公告)日：2022-06-16

    申请号：US17686585

    申请日：2022-03-04

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA ,  Semih ESENLIK ,  Biao WANG ,  Han GAO ,  Roman Igorevich CHERNYAK

    IPC: H04N19/124 ,  H04N19/117 ,  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.

    ENCODER, A DECODER AND CORRESPONDING METHODS OF SIGNALING AND SEMANTICS IN PARAMETER SETS
    56.
    发明申请
    ENCODER, A DECODER AND CORRESPONDING METHODS OF SIGNALING AND SEMANTICS IN PARAMETER SETS 有权

    公开(公告)号：US20220182649A1

    公开(公告)日：2022-06-09

    申请号：US17681003

    申请日：2022-02-25

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Biao WANG ,  Semih ESENLIK ,  Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA ,  Han GAO

    IPC: H04N19/31 ,  H04N19/70 ,  H04N19/136 ,  H04N19/187

    Abstract: Signalling of syntax elements in a sequence parameter set of a video bitstream is addressed. Particularly, it is provided a method of decoding a video bitstream wherein a sequence parameter set, SPS, is coded that contains syntax elements that apply to a video sequence, the method comprising obtaining a value of a first syntax element from the SPS used to specify whether a decoded picture buffer, DPB, parameters syntax structure is present in the SPS and obtaining a value of a second syntax element from the SPS, at least when determining that the value of the first syntax element specifies that the DPB parameters syntax structure is present in the SPS, used to specify the presence of a DPB syntax element in the DPB parameters syntax structure, wherein the DPB syntax element is applied to a temporal sublayer except for the highest temporal sublayer in the video sequence.

    ENCODER, A DECODER AND CORRESPONDING METHODS RELATED TO INTRA PREDICTION MODE
    58.
    发明申请
    ENCODER, A DECODER AND CORRESPONDING METHODS RELATED TO INTRA PREDICTION MODE 有权

    公开(公告)号：US20220007034A1

    公开(公告)日：2022-01-06

    申请号：US17478534

    申请日：2021-09-17

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Biao WANG ,  Semih ESENLIK ,  Han GAO ,  Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA

    IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/196

    Abstract: A method of coding implemented by a decoding device or an encoding device, comprising obtaining indication information for a luma position (cbWidth/2, cbHeight/2) of a current coding block, relative to a top-left luma sample postion (xCb, yCb) of the current coding block; setting a value of a luma intra prediction mode associated with the current coding block to a first default value, when the indication information indicates that a Matrix-based Intra Prediction (MIP) is applied for the luma component at the luma position (cbWidth/2, cbHeight/2), relative to the top-left luma sample postion (xCb, yCb) of the current coding block; and obtaining a value of a chroma intra prediction mode based on the value of the luma intra prediction mode of the current coding block.

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