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    Image encoding/decoding method and device based on hybrid NAL unit type, and recording medium for storing bitstream
    34.
    发明授权
    Image encoding/decoding method and device based on hybrid NAL unit type, and recording medium for storing bitstream 有权

    公开(公告)号：US11818380B2

    公开(公告)日：2023-11-14

    申请号：US17951581

    申请日：2022-09-23

    Applicant: LG ELECTRONICS INC.

    Inventor： Hendry Hendry ,  Seung Hwan Kim

    IPC: H04N19/46 ,  H04N19/174 ,  H04N19/169

    CPC classification number: H04N19/46 ,  H04N19/174 ,  H04N19/188

    Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method includes obtaining, from a bitstream, network abstraction layer (NAL) unit type information of at least one NAL unit including coded image data, determining at least one NAL unit type of one or more slices in the current picture based on the obtained NAL unit type information, and decoding the current picture based on the determined NAL unit type. The current picture is determined to be a random access skipped leading (RASL) picture, based on the determined NAL unit type including a RASL picture NAL unit type (RASL_NUT). When an intra random access point (IRAP) picture associated with the RASL picture is a first picture in decoding order, the RASL picture is decoded, based on the RASL picture including one or more slices having a random access decodable leading (RADL) picture NAL unit type (RADL_NUT).

    Image encoding/decoding method and device on basis of wrap-around motion compensation, and recording medium storing bitstream
    35.
    发明授权
    Image encoding/decoding method and device on basis of wrap-around motion compensation, and recording medium storing bitstream 有权

    公开(公告)号：US11785245B2

    公开(公告)日：2023-10-10

    申请号：US17952727

    申请日：2022-09-26

    Applicant: LG Electronics Inc.

    Inventor： Hendry Hendry ,  Seethal Paluri ,  Seung Hwan Kim

    IPC: H04N19/55 ,  H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

    Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus comprises obtaining inter prediction information of a current block and wraparound information from a bitstream, and generating a prediction block of the current block based on the inter prediction information and the wraparound information. The wraparound information may comprise a first flag specifying whether wraparound motion compensation is enabled for a current picture including the current block. Based on the first flag having a predetermined value specifying that the wraparound motion compensation is enabled for the current picture, the prediction block may be generated by performing the wraparound motion compensation, and the wraparound motion compensation may be performed based on either boundaries of a current subpicture including the current block or boundaries of a reference picture of the current block, based on whether the current subpicture is independently coded or not.

    Image encoding/decoding method and device based on hybrid NAL unit type, and recording medium for storing bitstream
    38.
    发明授权
    Image encoding/decoding method and device based on hybrid NAL unit type, and recording medium for storing bitstream 有权

    公开(公告)号：US12289463B2

    公开(公告)日：2025-04-29

    申请号：US18371232

    申请日：2023-09-21

    Applicant: LG ELECTRONICS INC.

    Inventor： Hendry Hendry ,  Seung Hwan Kim

    IPC: H04N19/46 ,  H04N19/169 ,  H04N19/174

    Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method includes obtaining, from a bitstream, network abstraction layer (NAL) unit type information of at least one NAL unit including coded image data, determining at least one NAL unit type of one or more slices in the current picture based on the obtained NAL unit type information, and decoding the current picture based on the determined NAL unit type. The current picture is determined to be a random access skipped leading (RASL) picture, based on the determined NAL unit type including a RASL picture NAL unit type (RASL_NUT). When an intra random access point (IRAP) picture associated with the RASL picture is a first picture in decoding order, the RASL picture is decoded, based on the RASL picture including one or more slices having a random access decodable leading (RADL) picture NAL unit type (RADL_NUT).

    Image encoding/decoding method and device for performing BDOF, and method for transmitting bitstream
    40.
    发明授权
    Image encoding/decoding method and device for performing BDOF, and method for transmitting bitstream 有权

    公开(公告)号：US12231644B2

    公开(公告)日：2025-02-18

    申请号：US17639837

    申请日：2020-09-09

    Applicant: LG Electronics Inc.

    Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang ,  Seung Hwan Kim

    IPC: H04N19/82 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise deriving a prediction sample of a current block based on motion information of the current block, determining whether bi-directional optical flow (BDOF) applies to the current block, based on that the BDOF applies to the current block, deriving a gradient for a current subblock in the current block, deriving motion refinement (vx, vy) for the current subblock based on the gradient, deriving a BDOF offset based on the gradient and the motion refinement, and deriving a refined prediction sample for the current block based on the prediction sample of the current block and the BDOF offset.

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