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    NON-SEPARABLE PRIMARY TRANSFORM DESIGN METHOD AND APPARATUS
    112.
    发明申请
    NON-SEPARABLE PRIMARY TRANSFORM DESIGN METHOD AND APPARATUS 有权

    公开(公告)号：US20250024081A1

    公开(公告)日：2025-01-16

    申请号：US18704707

    申请日：2022-10-25

    Applicant: LG Electronics Inc.

    Inventor： Jungah CHOI ,  Jangwon CHOI ,  Jaehyun LIM ,  Seunghwan KIM

    IPC: H04N19/70 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61

    Abstract: According to the disclosure of the present document, by configuring a primary transform to include a non-separable transform, higher encoding efficiency may be expected compared to the existing primary transform including only a separable transform. Also, by applying a non-separable primary transform using residual characteristics of a current block or neighboring block, the number of bits required for signaling information related to a non-separable transform kernel may be reduced, and more efficient compression performance may be obtained. In addition, even though a non-separable transform has higher computational complexity or memory requirements than a separable transform, computational complexity and power consumption may be reduced through the disclosure of the present document.

    NON-SEPARABLE PRIMARY TRANSFORM DESIGN METHOD AND APPARATUS
    113.
    发明申请
    NON-SEPARABLE PRIMARY TRANSFORM DESIGN METHOD AND APPARATUS 有权

    公开(公告)号：US20240414374A1

    公开(公告)日：2024-12-12

    申请号：US18703597

    申请日：2022-10-20

    Applicant: LG Electronics Inc.

    Inventor： Jungah CHOI ,  Seunghwan KIM ,  Moonmo KOO ,  Jie ZHAO ,  Jaehyun LIM ,  Jangwon CHOI

    IPC: H04N19/60 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

    Abstract: According to the disclosure of the present document, by configuring a primary transform to include a non-separable transform, higher encoding efficiency may be expected compared to the existing primary transform including only a separable transform. Also, by efficiently signaling information related to a primary transform including a separable transform and a non-separable transform, the effect of reducing the number of bits and improving coding performance may be expected. In addition, by efficiently applying a primary transform and a secondary transform, computational complexity and power consumption may be reduced, and latency required for additionally generated transform coefficient processing may be minimized.

    VIDEO OR IMAGE CODING METHOD AND DEVICE THEREFOR
    115.
    发明申请
    VIDEO OR IMAGE CODING METHOD AND DEVICE THEREFOR 有权

    公开(公告)号：US20240380901A1

    公开(公告)日：2024-11-14

    申请号：US18771179

    申请日：2024-07-12

    Applicant: LG Electronics Inc.

    Inventor： Jungah CHOI ,  Jin HEO ,  Sunmi YOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seunghwan KIM

    IPC: H04N19/176 ,  H04N19/12 ,  H04N19/132 ,  H04N19/70

    Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining, through a bitstream, image information including a motion information candidate index and residual information; deriving motion information of a current block on the basis of the motion information candidate index; deriving a prediction sample on the basis of the motion information; deriving, on the basis of residual syntax elements for a current residual coefficient in the current block, the current residual coefficient; deriving a residual sample on the basis of the current residual coefficient; and deriving a reconstruction sample of the current block on the basis of the prediction sample and the residual sample.

    IMAGE ENCODING/DECODING METHOD, METHOD FOR TRANSMITTING BITSTREAM, AND RECORDING MEDIUM STORING BITSTREAM
    118.
    发明公开
    IMAGE ENCODING/DECODING METHOD, METHOD FOR TRANSMITTING BITSTREAM, AND RECORDING MEDIUM STORING BITSTREAM 审中-公开

    公开(公告)号：US20240291977A1

    公开(公告)日：2024-08-29

    申请号：US18569032

    申请日：2022-08-03

    Applicant: LG Electronics Inc.

    Inventor： Jangwon CHOI ,  Jaehyun LIM ,  Sunmi YOO ,  Jungah CHOI

    IPC: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/82

    CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/82

    Abstract: Provided are an image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium that stores a bitstream. The image decoding method according to the present disclosure is performed by an image decoding apparatus, and comprises the steps of: applying deblocking filtering to reconstructed samples; and deriving a modified luma sample and modified chroma samples by applying one or more of sample adaptive offset (SAO) filtering and cross component sample adaptive offset (CC-SAO) filtering to the reconstructed samples to which the deblocking filtering has been applied, wherein the modified luma sample is derived by applying the SAO filtering to a luma sample to which the deblocking filtering has been applied, and the modified chroma samples are derived by applying the SAO filtering to chroma samples to which the deblocking filtering has been applied, and applying the CC-SAO filtering to chroma samples to which the deblocking filtering has been applied and a luma sample to which first in-loop filtering has been applied.

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