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    Inter-prediction method and apparatus in image coding system
    1.
    发明授权
    Inter-prediction method and apparatus in image coding system 有权

    公开(公告)号：US12160583B2

    公开(公告)日：2024-12-03

    申请号：US18368336

    申请日：2023-09-14

    Applicant: LG Electronics Inc.

    Inventor： Naeri Park ,  Junghak Nam ,  Jaehyun Lim ,  Seunghwan Kim ,  Jungdong Seo ,  Jaeho Lee ,  Hyeongmoon Jang

    IPC: H04N19/139 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/503

    Abstract: An image decoding method performed by a decoding apparatus includes the operations: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block based on a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated based on the scaled movement vector and location of the current block; and deriving a movement vector of the current block based on the updated movement vector.

    Image decoding method and apparatus based on inter-prediction in image coding system
    2.
    发明授权
    Image decoding method and apparatus based on inter-prediction in image coding system 有权

    公开(公告)号：US11057640B2

    公开(公告)日：2021-07-06

    申请号：US16767925

    申请日：2018-11-28

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri Park ,  Seethal Paluri ,  Junghak Nam ,  Jungdong Seo ,  Jaeho Lee ,  Hyeongmoon Jang

    IPC: H04N19/56 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

    Abstract: A video decoding method performed by a decoding apparatus includes obtaining information regarding inter-prediction of a current block via a bitstream; forming an MVP candidate list based on neighbouring blocks of the current block; deriving costs with respect to MVP candidates that are included in the MVP candidate list; deriving a revised MVP candidate list based on the costs with respect to the MVP candidates; deriving MVP of the current block based on the revised MVP candidate list; deriving a motion vector of the current block based on the MVP and MVD of the current block; and performing prediction on the current block based on a reference picture index and the motion vector of the current block. The information regarding inter-prediction includes the reference picture index and the MVD.

    Depth picture coding method and device in video coding
    4.
    发明授权
    Depth picture coding method and device in video coding 有权

    公开(公告)号：US10659814B2

    公开(公告)日：2020-05-19

    申请号：US15319335

    申请日：2015-09-25

    Applicant: LG ELECTRONICS INC.

    Inventor： Junghak Nam ,  Sehoon Yea ,  Jungdong Seo ,  Sunmi Yoo

    IPC: H04N19/597 ,  H04N19/17 ,  H04N19/124 ,  H04N19/172 ,  H04N19/44 ,  H04N19/51

    Abstract: The present invention relates to 3D video coding device and method. A decoding method, according to the present invention, provides a 3D video decoding method. A decoding method comprises the steps of: obtaining a disparity value on the basis of a reference view and a predetermined value; deriving movement information of a current block in a depth picture on the basis of the disparity value; and generating a prediction sample of the current block on the basis of the movement information, wherein the reference view is a view of a reference picture in a reference picture list. According to the present invention, even when a base view cannot be accessed, a disparity vector can be derived on the basis of an available reference view index in a decoded picture buffer (DPB), and coding efficiency can be enhanced.

    Inter prediction method and apparatus in image coding system
    5.
    发明授权
    Inter prediction method and apparatus in image coding system 有权

    公开(公告)号：US10575011B2

    公开(公告)日：2020-02-25

    申请号：US15761665

    申请日：2016-08-25

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri Park ,  Jaehyun Lim ,  Jungdong Seo ,  Junghak Nam

    IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/513

    Abstract: An inter prediction method performed by a decoding apparatus according to the present invention comprises the steps of: receiving information associated with an MVD through a bit stream; deriving a candidate motion information list on the basis of a neighboring block of a current block; deriving an MVP of the current block on the basis of the candidate motion information list; deriving a motion vector of the current block on the basis of the MVP and the MVD; and generating a prediction sample with respect to the current block on the basis of the motion vector. According to the present invention, a motion vector may be derived on the basis of a candidate motion information list derived on the basis of a neighboring block. Therefore, the amount of data of prediction mode information can be reduced and inter prediction accuracy and overall coding efficiency can be improved.

    Method and device for decoding image in image coding system
    10.
    发明授权
    Method and device for decoding image in image coding system 有权

    公开(公告)号：US10764598B2

    公开(公告)日：2020-09-01

    申请号：US16465895

    申请日：2016-12-05

    Applicant: LG ELECTRONICS INC.

    Inventor： Jungdong Seo ,  Jaehyun Lim

    IPC: H04N11/02 ,  H04N19/513 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/44 ,  H04N19/109 ,  H04N19/139 ,  H04N19/13 ,  H04N19/172 ,  H04N19/91

    Abstract: An image decoding method performed by a decoding device according to the present invention comprises the steps of: acquiring information on inter prediction of a target block through a bit stream; deriving motion information of the target block on the basis of the information on inter prediction; deriving a prediction sample by performing inter prediction for the target block on the basis of the motion information; generating a reconstruction block on the basis of the prediction sample; deriving modified motion information of the target block on the basis of the reconstruction block; and updating the motion information of the target block on the basis of the modified motion information. According to the present invention, modified motion information of the target block can be calculated, and the motion information of the target block can be updated on the basis of the modified motion information, so that the overall coding efficiency can be improved.

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