公开(公告)号：US20220150537A1

公开(公告)日：2022-05-12

申请号：US17431348

申请日：2020-02-26

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Jungah CHOI

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/132

Abstract: An image decoding method according to the present document comprises the steps of: acquiring, from a bitstream, reference line index information indicating a reference line to be used for intra prediction of a current block; constructing a most probable mode (MPM) list by deriving candidate intra prediction modes of the current block on the basis of the value of the reference line index information; deriving the intra prediction mode of 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 restoration samples for the current block on the basis of the prediction samples, wherein, on the basis of the case in which the value of the reference line index information is not zero, one of the candidate intra prediction modes is a DC mode and the number of candidate intra prediction modes including the DC mode is 5.

公开(公告)号：US20220109872A1

公开(公告)日：2022-04-07

申请号：US17502946

申请日：2021-10-15

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jin HEO ,  Jangwon CHOI ,  Jungah CHOI

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

公开(公告)号：US20220070472A1

公开(公告)日：2022-03-03

申请号：US17418378

申请日：2019-12-31

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Jin HEO ,  Ling LI ,  Jangwon CHOI ,  Jungah CHOI ,  Seunghwan KIM ,  Junghak NAM

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/70 ,  H04N19/132 ,  H04N19/167

Abstract: A method for decoding a video performed by a decoding device according to the present document comprises: a step for receiving residual information for a current block; a step for parsing one sign flag for a current sub-block of the current block, wherein the one sign flag indicates whether all signs of non-zero residual coefficients of the current sub-block are the same; a step for deriving the non-zero residual coefficients on the basis of sign information for the non-zero residual coefficients when the value of the one sign flag is 1; a step for deriving residual samples on the basis of the non-zero residual coefficients; and a step for restoring a current picture on the basis of the residual samples.

公开(公告)号：US20220014787A1

公开(公告)日：2022-01-13

申请号：US17283906

申请日：2019-10-07

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Seunghwan KIM ,  Jungah CHOI ,  Ling LI ,  Jangwon CHOI ,  Jin HEO

IPC: H04N19/60 ,  H04N19/124 ,  H04N19/176 ,  H04N19/12 ,  H04N19/132 ,  H04N19/18

Abstract: An image decoding method according to the present document 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 restoration picture on the basis of the residual sample for the current block, wherein the residual information includes position information for indicating the position of a transform coefficient, which is not the last 0 in a transform block, and the position information can be derived if a transform skip is not applied to the transform block.

公开(公告)号：US20210409716A1

公开(公告)日：2021-12-30

申请号：US17373114

申请日：2021-07-12

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/88 ,  H04N19/46 ,  H04N19/70 ,  H04N19/18 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: receiving a bitstream including residual information of a current block; deriving a specific number of context-encoding bins for context syntax elements for a current sub-block of the current block; decoding the context syntax elements for the current sub-block included in the residual information on the basis of the specific number; deriving transform coefficients for the current sub-block on the basis of the decoded context syntax elements; deriving residual samples for the current block on the basis of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20210337204A1

公开(公告)日：2021-10-28

申请号：US17312602

申请日：2019-12-31

Applicant: LG Electronics Inc.

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

IPC: H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/70 ,  H04N19/18 ,  H04N19/176 ,  H04N19/129

Abstract: An image decoding method, which is performed by a decoding device according to the present document, is characterized by including: a step for receiving a bitstream including residual information about the current block; a step for deriving a maximum value of the number of context-encoding bins for context syntax elements coded on the basis of context included in the residual information; a step for entropy-decoding the context syntax elements on the basis of the maximum value; a step for deriving conversion coefficients for the current block on the basis of the entropy-decoded context syntax elements; a step for deriving a residual sample for the current block on the basis of the conversion coefficients; and a step for generating a reconstructed picture on the basis of the residual sample for the current block.

公开(公告)号：US20200267382A1

公开(公告)日：2020-08-20

申请号：US16815884

申请日：2020-03-11

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Seunghwan KIM ,  Jin HEO ,  Sunmi YOO ,  Jangwon CHOI ,  Jungah CHOI

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/46 ,  H04N19/70 ,  H04N19/176

Abstract: A video decoding method according to this document includes constructing a most probable mode (MPM) list by deriving MPM candidates for a current block based on a neighboring block adjacent to the current block, deriving an intra prediction mode for the current block based on the MPM list, generating predicted samples by performing prediction for the current block based on the intra prediction mode, and generating a reconstructed picture for the current block based on the predicted samples.

公开(公告)号：US20200228831A1

公开(公告)日：2020-07-16

申请号：US16633073

申请日：2018-07-26

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Seunghwan KIM

IPC: H04N19/593 ,  H04N19/176

Abstract: Disclosed herein are an intra prediction mode based image processing method and an apparatus therefor. Specifically, a method for processing an image based on an intra prediction mode may include: deriving an intra prediction mode of a current block; deriving a first reference sample from at least one reference sample of left, top, top left, bottom left, and top right reference samples of the current block based on the intra prediction mode; deriving a second reference sample from at least one reference sample of right, bottom, and bottom right reference samples of the current block based on the intra prediction mode; dividing the current block into a first sub-region and a second sub-region; generating a prediction sample for the first sub-region using the first reference sample; and generating a prediction sample for the second sub-region using the first reference sample and the second reference sample.

公开(公告)号：US20200221124A1

公开(公告)日：2020-07-09

申请号：US16822508

申请日：2020-03-18

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO

IPC: H04N19/593 ,  H04N19/132 ,  H04N19/176 ,  H04N19/59

Abstract: An image decoding method performed by a decoding apparatus according to the present invention comprises: a step of deriving an intra prediction mode for a current block; a step of deriving upper neighboring samples of a plurality of rows for the current block, and left neighboring samples of a plurality of columns; a step of deriving one row of upper reference samples on the basis of the upper neighboring samples; a step of deriving one column of left reference samples on the basis of the left neighboring samples; and a step of generating a prediction sample for the current block by using at least one of the upper reference samples and the left reference samples in accordance with the intra prediction mode.

公开(公告)号：US20200084455A1

公开(公告)日：2020-03-12

申请号：US16677100

申请日：2019-11-07

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Yongjoon JEON ,  Sunmi YOO ,  Eunyong SON ,  Junghak NAM

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/119 ,  H04N19/107 ,  H04N19/176

Abstract: In the present invention, a method for processing an image on the basis of an intra prediction mode and an apparatus therefor are disclosed. Particularly, the method for processing an image on the basis of an intra prediction mode may comprise the steps of: partitioning a block to be processed, on the basis of an intra prediction mode of the block to be processed; and performing intra prediction for the split block to be processed, wherein the direction in which the block to be processed is split is perpendicular to the prediction direction of the intra prediction mode of the block to be processed.