公开(公告)号：US11677952B2

公开(公告)日：2023-06-13

申请号：US17865959

申请日：2022-07-15

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/13 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60

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.

公开(公告)号：US11632557B2

公开(公告)日：2023-04-18

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 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

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：US11582457B2

公开(公告)日：2023-02-14

申请号：US17682744

申请日：2022-02-28

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jangwon Choi

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  H04N19/46 ,  H04N19/80

Abstract: According to an embodiment of the present document, a method for increasing the accuracy of in-loop filtering is proposed. In an example, the filtering accuracy of chroma blocks can be improved on the basis of luma blocks by performing a cross component adaptive loop filtering process.

公开(公告)号：US20230023002A1

公开(公告)日：2023-01-26

申请号：US17945786

申请日：2022-09-15

Applicant: LG ELECTRONICS INC.

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

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

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：US20220360777A1

公开(公告)日：2022-11-10

申请号：US17620598

申请日：2020-06-19

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Jin HEO ,  Sunmi Yoo ,  Jungah Choi ,  Seung Hwan Kim

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining a splitting type of a current block, splitting the current block into a plurality of lower-layer blocks based on the splitting type, and decoding the lower-layer blocks. In this case, the current block may be a chroma block, and the determining the splitting type of the current block may be performed by disallowing a predetermined type, in which a width or height of the lower-layer blocks is a predetermined value, among a plurality of splitting types.

公开(公告)号：US11496734B2

公开(公告)日：2022-11-08

申请号：US17683039

申请日：2022-02-28

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jangwon Choi

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/80 ,  H04N19/169 ,  H04N19/132 ,  H04N19/186 ,  H04N19/46

Abstract: According to one embodiment of the present document, a cross component adaptive loop filtering (CCALF) process may be performed. The CCALF process can enhance the filtering performance for chroma components and improve the subjective/objective image quality of a picture.

公开(公告)号：US20220312015A1

公开(公告)日：2022-09-29

申请号：US17834500

申请日：2022-06-07

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring a block-based delta pulse code modulation (BDPCM) available flag about whether a BDPCM is available for a chroma block and a luma block; acquiring, on the basis of the BDPCM available flag, a BDPCM luma flag about whether to apply the BDPCM to the current luma block; and acquiring, on the basis of the BDPCM available flag, a BDPCM chroma flag about whether to apply the BDPCM to the current chroma blocks.

公开(公告)号：US20220272338A1

公开(公告)日：2022-08-25

申请号：US17620586

申请日：2020-06-19

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Jin Heo ,  Sunmi Yoo ,  Jungah Choi ,  Seung Hwan Kim

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining a splitting structure of a current block composed of chroma components, determining a splitting type of the current block based on the splitting structure, obtaining a plurality of lower-layer blocks by splitting the current block based on the splitting type, and decoding the lower-layer blocks based on a prediction mode of the lower-layer blocks.

公开(公告)号：US11418803B2

公开(公告)日：2022-08-16

申请号：US17044545

申请日：2019-04-01

Applicant: LG Electronics Inc.

Inventor： Jangwon Choi

IPC: H04N19/00 ,  H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: A picture decoding method performed by a decoding apparatus according to the present disclosure includes detecting intra prediction modes of a plurality of luma blocks in a luma region corresponding to a current chroma block, generating a first predicted block for the current chroma block based on a first intra prediction mode of the intra prediction modes of the plurality of luma blocks, generating a second predicted block for the current chroma block based on a second intra prediction mode of the intra prediction modes of the plurality of luma blocks, generating a predicted block for the current chroma block based on a weighted sum using the first predicted block and the second predicted block, and generating a reconstructed block based on the predicted block for the current chroma block.

公开(公告)号：US11368687B2

公开(公告)日：2022-06-21

申请号：US17277639

申请日：2019-09-20

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Seunghwan Kim ,  Jin Heo

IPC: H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: The method for decoding an image by a decoding device according to the present document may comprise the steps of: acquiring image information comprising partitioning information for a current block; determining, on the basis of the size of the current block, whether to partition the current block; partitioning the current block into subblocks on the basis of the partitioning information, if it is determined that the current block is to be partitioned, and decoding the subblocks; and not partitioning the current block, if it is determined that the current block is not to be partitioned, and decoding the current block, wherein, if the current block is a chroma block, and the size of the current block is at most the minimum size of a chroma block, then it is determined that the current block is not to be partitioned.