公开(公告)号：US11330255B2

公开(公告)日：2022-05-10

申请号：US16953519

申请日：2020-11-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/176 ,  H04N19/46

Abstract: According to the present disclosure, a video decoding method performed by a video decoding device includes parsing remaining intra prediction mode information for a current block, deriving neighboring samples of the current block, deriving MPM list including MPM candidates of the current block, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates, deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples, and deriving a reconstructed picture based on the prediction sample, wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and wherein a binarization parameter for the TB binarization process is 60.

公开(公告)号：US20220132157A1

公开(公告)日：2022-04-28

申请号：US17569342

申请日：2022-01-05

Applicant: LG ELECTRONICS INC.

Inventor： Jungah CHOI ,  Jaehyun Lim ,  Sunmi Yoo ,  Jangwon Choi ,  Seunghwan Kim

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/132 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device according to the present document is characterized by including the steps of: receiving image information including a residual coding flag indicating whether a transform skip residual coding syntax structure is available for the current slice; determining whether the transform skip residual coding syntax structure is available for the current block in the current slice on the basis of the residual coding flag; parsing residual information for the current block on the basis of the results of the determination to derive residual samples of the current block; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20220116617A1

公开(公告)日：2022-04-14

申请号：US17557612

申请日：2021-12-21

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Seunghwan Kim ,  Jungah Choi ,  Jangwon Choi ,  Jin Heo

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises a step of receiving a bitstream containing residual information, and a step of deriving a quantized transform coefficient for a current block on the basis of the residual information contained in the bitstream, wherein the residual information includes a context syntax element coded on the basis of the context, and if the size of a transformation block is changed as much as a sub-block region having a predetermined size and the current block is the last sub-block in the sub-block region and the last quantized transform coefficient is in the current block, then the step of deriving a quantized transform coefficient includes context-based decoding of the context syntax element on the basis of a predetermined maximum value for the context syntax element, wherein the maximum value is determined on the basis of the size of the sub-block region.

公开(公告)号：US11218733B2

公开(公告)日：2022-01-04

申请号：US17148970

申请日：2021-01-14

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/64 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513 ,  H04N19/61

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information; deriving quantized transform coefficients for a current block based on the residual information included in the bitstream; deriving residual samples for the current block based on the quantized transform coefficients; and generating a reconstructed picture based on the residual samples for the current block.

公开(公告)号：US20210352321A1

公开(公告)日：2021-11-11

申请号：US17339809

申请日：2021-06-04

Applicant: LG ELECTRONICS INC.

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

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

Abstract: A video decoding method according to the present document comprises the steps of: configuring an MPM list by deriving candidate intra prediction modes on the basis of a first neighboring block located on the left side and a second neighboring block located on the upper side with respect to the current block; deriving an intra prediction mode for the current block on the basis of the MPM list; generating prediction samples for the current block on the basis of the intra prediction mode; and generating a reconstructed picture for the current block on the basis of the prediction samples, wherein a first intra prediction mode of the first neighboring block and a second intra prediction mode of the second neighboring block are the same, wherein the candidate intra prediction modes including a DC mode are derived on the basis of a case where both the first intra prediction mode and the second intra prediction mode are the DC mode.

公开(公告)号：US20210243443A1

公开(公告)日：2021-08-05

申请号：US17217739

申请日：2021-03-30

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/124 ,  H04N19/184 ,  H04N19/176 ,  H04N19/70 ,  H04N19/172 ,  H04N19/18 ,  H04N19/132 ,  H04N19/60

Abstract: A method by which a decoding device decodes an image, according to the present invention, comprises the steps of: receiving a bitstream including residual information; deriving a quantized transform coefficient for a current block on the basis of the residual information included in the bitstream; deriving a residual sample for the current block on the basis of the quantized transform coefficient; and generating a restored picture on the basis of the residual sample for the current block.

公开(公告)号：US20210084305A1

公开(公告)日：2021-03-18

申请号：US17104082

申请日：2020-11-25

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Jin Heo ,  Sunmi Yoo ,  Ling Li

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196

Abstract: A method for decoding a picture based on a cross-component linear model (CCLM) mode includes deriving neighboring luma reference samples of a luma block, deriving down-sampled neighboring luma reference samples, deriving a linear model parameter based on the down-sampled neighboring luma reference samples and the neighboring chroma reference samples, where the neighboring luma reference samples includes top neighboring luma reference samples, and left neighboring luma reference samples, and where when the top boundary of the luma block overlaps with a boundary of a coding tree unit (CTU), the number of the top neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples among the neighboring luma reference samples is less than that of the left neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples.

公开(公告)号：US20210076027A1

公开(公告)日：2021-03-11

申请号：US16953519

申请日：2020-11-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/46 ,  H04N19/11

Abstract: According to the present disclosure, a video decoding method performed by a video decoding device includes parsing remaining intra prediction mode information for a current block, deriving neighboring samples of the current block, deriving MPM list including MPM candidates of the current block, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates, deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples, and deriving a reconstructed picture based on the prediction sample, wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and wherein a binarization parameter for the TB binarization process is 60.

公开(公告)号：US20200252616A1

公开(公告)日：2020-08-06

申请号：US16856406

申请日：2020-04-23

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/46 ,  H04N19/129 ,  H04N19/176

Abstract: A method for decoding an image by a decoding device according to the present disclosure comprises the steps of: receiving a bit stream including residual information; deriving a quantized conversion factor of a current block on the basis of the residual information included in the bit stream; deriving a residual sample of the current block on the basis of the quantized conversion factor; and generating a reconstructed picture on the basis of the residual sample of the current block.

公开(公告)号：US20200036970A1

公开(公告)日：2020-01-30

申请号：US16591238

申请日：2019-10-02

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Jaeho Lee ,  Jangwon Choi ,  Jungdong Seo ,  Jin Heo

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/117 ,  H04N19/82

Abstract: A method by which a decoding device performs image decoding, according to the present invention, comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving reference samples for prediction of a target sample among the neighboring samples on the basis of the position of the target sample of the current block and the prediction angle of the intra prediction mode; determining an interpolation filter for the target sample; and deriving the prediction sample of the target sample on the basis of the interpolation filter and the reference samples.