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    Image decoding method and device using residual information in image coding system
    94.
    发明授权
    Image decoding method and device using residual information in image coding system 有权

    公开(公告)号：US11528482B2

    公开(公告)日：2022-12-13

    申请号：US17169899

    申请日：2021-02-08

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Jin Heo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi ,  Seunghwan Kim

    IPC: H04N19/13 ,  H04N19/176 ,  H04N19/124 ,  H04N19/60 ,  H04N19/136

    Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.

    Method and device for coding transform skip flag
    96.
    发明授权
    Method and device for coding transform skip flag 有权

    公开(公告)号：US11509903B2

    公开(公告)日：2022-11-22

    申请号：US17294943

    申请日：2019-11-27

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Jungah Choi ,  Seunghwan Kim ,  Jin Heo ,  Jangwon Choi ,  Jaehyun Lim ,  Ling Li

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176 ,  H04N19/169

    Abstract: An image decoding method according to the present document may include: a step for determining whether a current block is a dual-tree type in which individual division structures are applied to a luma component block and a chroma component block of the current block; a step for determining whether the current block is the luma component block to which the dual-tree type is applied, when the current block is determined to be the dual-tree type; a step for parsing a transform skip flag indicating whether a transform skip is applied to the luma component block, when the current block is the luma component block; a step for deriving whether a transform skip is applied to the chroma component block according to a preset condition, when the current block is not the luma component block; and a step for deriving a residual sample on the basis of the transform skip flag and residual information on the current block.

    Image prediction method and apparatus performing intra prediction
    97.
    发明授权
    Image prediction method and apparatus performing intra prediction 有权

    公开(公告)号：US11477440B2

    公开(公告)日：2022-10-18

    申请号：US17276786

    申请日：2019-09-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Jin Heo

    IPC: H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/82

    Abstract: An image decoding method according to the present document comprises the steps of: generating a prediction sample for the current block on the basis of an intra prediction mode for the current block and neighboring reference samples; and generating a reconstructed picture for the current block on the basis of the prediction sample, wherein, when the reference sample position indicated by a prediction direction of a directional prediction mode of the current block from the position of the prediction sample is the fractional sample position, the prediction sample is derived from among the neighboring reference samples by interpolating with respect to specific neighboring reference samples located around the fractional sample position, when the specific neighboring reference samples include outer neighboring reference samples located at (2*nW+1, −1) and (2*nW+2, −1) positions, the values of the outer neighboring reference samples are set to be equal to the value of a sample located at (2*nW, −1), and nW may indicate the width of the current block.

    Image prediction method and apparatus for performing intra prediction
    98.
    发明授权
    Image prediction method and apparatus for performing intra prediction 有权

    公开(公告)号：US11445216B2

    公开(公告)日：2022-09-13

    申请号：US17276026

    申请日：2019-09-16

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Jin Heo

    IPC: H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

    Abstract: An image decoding method according to the present document may comprise the steps of: deriving an intra prediction mode for a current block; deriving reference samples located around the current block; generating a prediction sample for the current block on the basis of the intra prediction mode and the reference samples; and generating residual samples for the current block on the basis of the prediction sample, wherein the step of generating the prediction sample for the current block may comprise the steps of: deriving an interpolation filter, which is to be applied to the reference sample, on the basis of the prediction mode of the current block or the size of the current block; and generating the prediction sample by applying the derived interpolation filter to the reference sample.

    Method and apparatus for processing video signal by using intra-prediction
    100.
    发明授权
    Method and apparatus for processing video signal by using intra-prediction 有权

    公开(公告)号：US11438579B2

    公开(公告)日：2022-09-06

    申请号：US17257169

    申请日：2019-07-02

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin Heo ,  Seunghwan Kim ,  Junghak Nam ,  Sunmi Yoo ,  Ling Li ,  Jaehyun Lim ,  Jangwon Choi ,  Jungah Choi

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/423 ,  H04N19/44

    Abstract: Embodiments of the present disclosure provide a method and an apparatus for processing a video signal through intra prediction. A method for processing a video signal according to an embodiment of the present disclosure may include: checking that intra prediction is applied to a current block including a current sample to be predicted; determining a first reference sample value on a first reference location from at least one of samples positioned at an upper horizontal line and a left vertical line adjacent to the current block, based on an intra-prediction direction of the current block; determining a second reference sample value on a second reference location positioned in an opposite direction to the intra-prediction direction from a location of the current sample or the first reference location; determining a distance between the first reference location and the current sample as a first distance and determining a distance between the second reference location and the current sample as a second distance; and generating a prediction value of the current sample using the linear interpolation prediction based on a sample value of the first reference sample, the first distance, a sample value of the second reference sample, and the second distance.

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