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    VIDEO DECODING APPARATUS AND VIDEO CODING APPARATUS
    1.
    发明公开
    VIDEO DECODING APPARATUS AND VIDEO CODING APPARATUS 审中-公开

    公开(公告)号：EP4443884A1

    公开(公告)日：2024-10-09

    申请号：EP22901401.4

    申请日：2022-12-01

    申请人： Sharp Kabushiki Kaisha

    发明人： HASHIMOTO, Tomonori ,  IKAI, Tomohiro ,  AONO, Tomoko

    IPC分类号： H04N19/70 ,  H04N19/103 ,  H04N19/136 ,  H04N19/176

    CPC分类号： H04N19/70 ,  H04N19/176 ,  H04N19/136 ,  H04N19/103

    摘要： Video coding and decoding apparatuses that can enhance coding efficiency are provided. A video decoding apparatus according to an aspect of the present invention is a video decoding apparatus including a parameter decoder configured to decode, from coded data, syntax (mts_idx) of a target block. The parameter decoder decodes mts_idx depending on a block size, a LAST position, and a non-zero coefficient position of the target block. The parameter decoder determines whether to decode mts_idx, using a threshold for the LAST position. The threshold is larger in a case that the block size is equal to or larger than a prescribed size than in a case that the block size is smaller than the prescribed size.

    IMAGE DATA ENCODING/DECODING METHOD AND APPARATUS
    7.
    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
    10.
    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.