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    IMAGE DATA ENCODING/DECODING METHOD AND APPARATUS
    2.
    发明公开
    IMAGE DATA ENCODING/DECODING METHOD AND APPARATUS 审中-实审

    公开(公告)号：EP4436182A2

    公开(公告)日：2024-09-25

    申请号：EP24192524.7

    申请日：2017-10-10

    申请人： B1 Institute of Image Technology, Inc.

    发明人： KIM, Ki Beak

    IPC分类号： H04N19/70

    CPC分类号： H04N19/119 ,  H04N19/129 ,  H04N19/176 ,  H04N19/597 ,  H04N19/52 ,  H04N19/55 ,  H04N19/70 ,  H04N19/96 ,  H04N23/698 ,  G06T3/12 ,  H04N19/126

    摘要： Disclosed is an image data encoding/decoding method and apparatus. A method for decoding a 360-degree image comprises the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Here, the step of generating the prediction image comprises the steps of: obtaining, from motion information included in the syntax information, a motion vector candidate group including a motion vector of a block adjacent to a current block to be decoded; deriving a prediction motion vector from the motion vector candidate group, on the basis of selection information extracted from the motion information; and determining a prediction block for the current block to be decoded, using a fmal motion vector derived by adding the prediction motion vector to a differential motion vector extracted from the motion information.

    IMAGE DATA ENCODING/DECODING METHOD AND APPARATUS
    3.
    发明公开
    IMAGE DATA ENCODING/DECODING METHOD AND APPARATUS 审中-实审

    公开(公告)号：EP4432670A2

    公开(公告)日：2024-09-18

    申请号：EP24192537.9

    申请日：2017-10-10

    申请人： B1 Institute of Image Technology, Inc.

    发明人： KIM, Ki Beak

    IPC分类号： H04N19/70

    CPC分类号： H04N19/119 ,  H04N19/129 ,  H04N19/176 ,  H04N19/597 ,  H04N19/52 ,  H04N19/55 ,  H04N19/70 ,  H04N19/96 ,  H04N23/698 ,  G06T3/12 ,  H04N19/126

    摘要： Disclosed is an image data encoding/decoding method and apparatus. A method for decoding a 360-degree image comprises the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Here, the step of generating the prediction image comprises the steps of: obtaining, from motion information included in the syntax information, a motion vector candidate group including a motion vector of a block adjacent to a current block to be decoded; deriving a prediction motion vector from the motion vector candidate group, on the basis of selection information extracted from the motion information; and determining a prediction block for the current block to be decoded, using a fmal motion vector derived by adding the prediction motion vector to a differential motion vector extracted from the motion information.

    METHOD AND APPARATUS FOR SCAN ORDER SELECTION
    10.
    发明公开
    METHOD AND APPARATUS FOR SCAN ORDER SELECTION 审中-公开

    公开(公告)号：EP3412027A1

    公开(公告)日：2018-12-12

    申请号：EP16763108.4

    申请日：2016-02-12

    申请人： Huawei Technologies Co., Ltd.

    发明人： FILIPPOV, Alexey Konstantinovich ,  RUFITSKIY, Vasily Alexeevich

    IPC分类号： H04N19/176 ,  H04N19/70 ,  H04N19/129 ,  H04N19/136 ,  H04N19/18

    CPC分类号： H04N19/129 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

    摘要： The invention proposes a decoder for decoding coefficients of blocks of a video sequence from a bitstream. The decoder comprises a decoding module configured to decode one or more coefficient vectors of each block from the bitstream. The decoder comprises a check module configured to reconstruct, for at least one block, hidden information from one or more coefficients of that block, the hidden information constituting or forming part of scan order information associated with that block. The decoder comprises a scan order selector configured to select a scan order for each block from a set of scan orders, preferably from a set of pre-defined and generated scan orders, on the basis of the scan order information associated with that block. The decoder comprises a deserializer configured to inverse scan, 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.