公开(公告)号：US20240406396A1

公开(公告)日：2024-12-05

申请号：US18736349

申请日：2024-06-06

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seung Hwan KIM ,  Hendry HENDRY ,  Seethal PALURI

IPC: H04N19/124 ,  H04N19/119 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method performed by the image decoding apparatus, according to the present disclosure, may comprise the steps of: determining whether a color space transformation is applied to residual samples of a current block; determining quantization parameter of the current block on the basis of whether the color space transformation is applied; and determining a transformation coefficient of the current block on the basis of the quantization parameter. The step of determining the quantization parameter may be performed by limiting the range of an effective value of the quantization parameter such that a value of the quantization parameter has a value less than or equal to a predetermined upper value and greater than or equal to a predetermined lower value.

公开(公告)号：US20240397048A1

公开(公告)日：2024-11-28

申请号：US18791990

申请日：2024-08-01

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM ,  Seethal PALURI

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining CU chroma QP offset-related information for a current chroma block on the basis of the size and tree type of the current chroma block; deriving a chroma QP for the current chroma block on the basis of the CU chroma QP offset-related information; deriving residual samples for the current chroma block on the basis of the chroma QP; and generating a reconstructed picture on the basis of the residual samples, wherein the CU chroma QP offset-related information includes a CU chroma QP offset flag and a CU chroma QP offset index for the current chroma block.

公开(公告)号：US20240388737A1

公开(公告)日：2024-11-21

申请号：US18785150

申请日：2024-07-26

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30

Abstract: According to the disclosure of the present document, scaling list data delivered in an adaptation parameter set (APS) may be signaled through a hierarchical structure, and the amount of data that needs to be signaled for video/image coding may be reduced and implementation may be facilitated by placing limits on the scaling list data delivered in the APS.

公开(公告)号：US20240364888A1

公开(公告)日：2024-10-31

申请号：US18771092

申请日：2024-07-12

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/50 ,  H04N19/61 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/50 ,  H04N19/61 ,  H04N19/70 ,  H04N19/96

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: acquiring image information; and generating a reconstruction picture on the basis of the image information.

公开(公告)号：US20240364862A1

公开(公告)日：2024-10-31

申请号：US18287811

申请日：2022-04-21

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM ,  Seethal PALURI

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

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: According to one embodiment of the present disclosure, a method by which a decoding device decodes an image is provided. The method comprises the steps of: acquiring intra prediction mode information about the current block; configuring a most probable mode (MPM) list and a secondary MPM list for the current block on the basis of adjacent blocks of the current block; deriving an intra prediction mode for the current block on the basis of the MPM list and/or the secondary MPM list and the intra prediction mode information; and generating a prediction sample for the current block on the basis of the intra prediction mode.

公开(公告)号：US20240357111A1

公开(公告)日：2024-10-24

申请号：US18573087

申请日：2022-07-06

Applicant: LG Electronics Inc.

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

IPC: H04N19/122 ,  H04N19/176 ,  H04N19/196

CPC classification number: H04N19/122 ,  H04N19/176 ,  H04N19/196

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method comprises generating a residual block of a current block by performing inverse transform on the current block based on a predetermined non-separable primary transform matrix and reconstructing the current block based on the residual block. The non-separable primary transform matrix may be applied to all transform coefficients of the current block regardless of a size of the current block.

公开(公告)号：US20240340412A1

公开(公告)日：2024-10-10

申请号：US18575706

申请日：2022-06-29

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM ,  Seethal PALURI

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

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/593

Abstract: According to one embodiment of the present disclosure, a method by which a decoding device decodes an image is provided. The method comprises the steps of: acquiring image information including primary most probable mode (MPM) flag information and secondary MPM flag information; configuring an MPM list including candidate intra prediction modes for the current block on the basis of the primary MPM flag information and/or the secondary MPM flag information; deriving an intra prediction mode for the current block from among the candidate intra prediction modes included in the MPM list; generating a prediction sample for the current block on the basis of the intra prediction mode; generating a restoration sample for the current block on the basis of the prediction sample.

公开(公告)号：US20240305827A1

公开(公告)日：2024-09-12

申请号：US18659516

申请日：2024-05-09

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Hendry HENDRY ,  Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/51

CPC classification number: H04N19/70 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/51 ,  H04N19/132

Abstract: According to the present document, a video decoding method performed by a video decoding device may comprise the steps of: parsing a first flag and a second flag from a bitstream, wherein the first flag is related to whether weighted prediction is applied to slices referring to a picture parameter set within the bitstream, and the second flag is related to whether information relating to the weighted prediction exists in a picture header within the bitstream; parsing a prediction weighted table syntax from the picture header on the basis of the first flag and the second flag; generating prediction samples for a current block in a current picture on the basis of syntax elements within the prediction weighted table syntax; generating residual samples on the basis of residual information obtained from the bitstream; and generating reconstructed samples on the basis of the prediction samples and the residual samples, wherein the second flag is parsed from the picture parameter set on the basis of the first flag.

公开(公告)号：US20240298014A1

公开(公告)日：2024-09-05

申请号：US18662881

申请日：2024-05-13

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/70

Abstract: According to the disclosure of the present document, chroma quantization parameter offset-related information can be signaled through palette syntax coding, and index information for a chroma quantization parameter offset list can be efficiently parsed/signaled on the basis of information about the number of entries in the chroma quantization parameter offset list. Accordingly, bits that are required to be signaled in order to code a video/image can be reduced, and the coding efficiency can be enhanced.

公开(公告)号：US20240297999A1

公开(公告)日：2024-09-05

申请号：US18659354

申请日：2024-05-09

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: obtaining a flag indicating whether one chroma quantization parameter table is applied to chroma components; obtaining chroma quantization parameter data on the basis of the flag; deriving the chroma quantization parameter table on the basis of the chroma quantization parameter data; deriving a chroma quantization parameter for the chroma components on the basis of the chroma quantization parameter table; deriving residual samples for the chroma components on the basis of the chroma quantization parameter; and generating a reconstructed picture on the basis of the residual samples.