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    Image decoding method and apparatus based on inter-prediction in image coding system
    42.
    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
    44.
    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.

    Image properties-based adaptive filtering method and device in image coding system
    45.
    发明授权
    Image properties-based adaptive filtering method and device in image coding system 有权

    公开(公告)号：US10600156B2

    公开(公告)日：2020-03-24

    申请号：US15737552

    申请日：2016-02-02

    Applicant: LG Electronics Inc.

    Inventor： Chulkeun Kim ,  Junghak Nam

    IPC: G06T5/00 ,  H04N19/117 ,  H04N19/82 ,  H04N19/85 ,  H04N19/70 ,  G06T5/10 ,  G06T5/20

    Abstract: A restoring picture filtering method performed by a decoding device, according to the present invention, comprises the steps of: calculating the activity of an image of a target region of a restoring picture; determining the directivity of the image of the target region; selecting a particular filter within a filter set on the basis of the activity and the directivity; and performing filtering on the restoring picture on the basis of the selected filter. According to the present invention, adaptive filtering may be applied on the basis of image properties of a target block of a restoring picture, and the objective/subjective image quality of the restoring picture may be enhanced therethrough.

    Modeling-based image decoding method and device in image coding system
    46.
    发明授权
    Modeling-based image decoding method and device in image coding system 有权

    公开(公告)号：US10595017B2

    公开(公告)日：2020-03-17

    申请号：US15768773

    申请日：2016-10-24

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin Heo ,  Eunyong Son ,  Junghak Nam

    IPC: H04N19/176 ,  H04N19/105 ,  H04N19/147 ,  H04N19/11 ,  H04N19/117 ,  H04N19/44 ,  H04N19/13 ,  H04N19/139 ,  H04N19/91

    Abstract: According to the present invention, an image decoding method performed by a decoding device comprises the steps of: deriving a prediction mode of a current block; generating a prediction block of the current block on the basis of the prediction mode of the current block; deriving a neighboring block of the current block; deriving correlation information on the basis of a reconstruction block of the neighboring block and a prediction block of the neighboring block; deriving a modified prediction block of the current block on the basis of the prediction block of the current block and the correlation information; and deriving a reconstruction block of the current block on the basis of the modified prediction block. According to the present invention, a current block can be predicted in consideration of the correlation between a prediction sample and a reconstruction sample of a neighboring block, and a complicated image can be more efficiently reconstructed through the prediction.

    Inter prediction method and apparatus in image coding system
    47.
    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 predicting block on basis of illumination compensation in image coding system
    49.
    发明授权
    Method and device for predicting block on basis of illumination compensation in image coding system 有权

    公开(公告)号：US10477231B2

    公开(公告)日：2019-11-12

    申请号：US15737037

    申请日：2015-12-09

    Applicant: LG Electronics Inc.

    Inventor： Jaehyun Lim ,  Seungwook Park ,  Junghak Nam

    IPC: H04N19/46 ,  H04N19/513 ,  H04N19/176 ,  H04N19/117 ,  H04N19/136 ,  H04N19/186 ,  H04N19/82 ,  H04N19/105

    Abstract: A block prediction method for decoding a picture, according to the present invention, comprises the steps of: deriving a reference block from a reference picture to predict a current block in a current picture; determining a reference illumination compensation (IC) parameter; generating an illumination-compensated reference block by applying reference IC to the reference block on the basis of the reference IC parameter; and generating a predicted sample of the current block on the basis of the illumination-compensated reference block. According to the present invention, an illumination difference between the current block of the current picture and the reference block of the reference picture can be compensated for, block prediction efficiency can be increased, and a data amount of a residual signal to be transmitted from an encoder to a decoder is reduced. Therefore, compression and coding efficiency can be increased.

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