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    Image decoding method and apparatus based on inter-prediction in image coding system
    72.
    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.

    Inter-prediction method and apparatus in image coding system
    75.
    发明授权
    Inter-prediction method and apparatus in image coding system 审中-公开

    公开(公告)号：US10674175B2

    公开(公告)日：2020-06-02

    申请号：US16331807

    申请日：2017-08-31

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri Park ,  Hyeongmoon Jang ,  Jaehyun Lim

    IPC: H04N19/51 ,  H04N19/14 ,  H04N19/70 ,  H04N19/91 ,  H04N19/105 ,  H04N19/176 ,  H04N19/503

    Abstract: An inter-prediction method according to the present invention comprises the steps of: deriving a first movement vector of the current block; deriving prediction samples for the current block on the basis of the first movement vector; deriving a subunit located in the current block and adjacent to the target boundary of same; deriving a first reference unit on the basis of the subunit and first movement vector; deriving a second movement vector of a neighboring block adjacent to the target boundary; deriving a second reference unit on the basis of the subunit and second movement vector; and deriving the modified prediction samples on the basis of weighted sum of the first reference unit and second reference unit. According to the present invention, by increasing the effectiveness of inter-prediction at the block boundary, amount of data required for residual data can be reduced and the overall coding efficiency can be increased.

    Method for encoding/decoding image and apparatus therefor
    77.
    发明授权
    Method for encoding/decoding image and apparatus therefor 有权

    公开(公告)号：US10575019B2

    公开(公告)日：2020-02-25

    申请号：US15757584

    申请日：2016-05-13

    Applicant: LG Electronics Inc.

    Inventor： Jaehyun Lim ,  Naeri Park ,  Jin Heo

    IPC: H04N19/82 ,  H04N19/132 ,  H04N19/176

    Abstract: Disclosed are a method for encoding/decoding an image and an apparatus therefor. Specifically, the method for decoding an image may comprise the steps of: performing interpolation filtering of a reference picture; generating predicted samples from samples in the reference picture for which the interpolation filtering has been performed; generating reconstructed samples by adding residual samples and the predicted samples; and performing loop filtering of the reconstructed samples, wherein whether the predicted samples have been generated by applying a predetermined filter when performing the interpolation filtering is determined in units of first blocks; whether the filter is applied to the reconstructed samples is determined in units of second blocks, and whether the filter is applied to the reconstructed samples when performing the loop filtering is determined on the basis of whether the filter has been applied to the predicted samples when performing the interpolation filtering.

    Inter prediction method and apparatus in image coding system
    78.
    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.

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