公开(公告)号：US12294726B2

公开(公告)日：2025-05-06

申请号：US18413530

申请日：2024-01-16

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/186 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/44 ,  H04N19/117 ,  H04N19/70

Abstract: According to the disclosure of the present document, LMCS may also be applied to a block having a dual tree structure. In addition, the number of LMCS APS may be limited. Therefore, an LMCS procedure may be efficiently performed, and the complexity of LMCS may be reduced. As the performance of LMCS is improved, the video/image coding efficiency may be increased.

公开(公告)号：US12284370B2

公开(公告)日：2025-04-22

申请号：US18662228

申请日：2024-05-13

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/124 ,  H04N19/107 ,  H04N19/12 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/18 ,  H04N19/186 ,  H04N19/61 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information comprising a flag indicating whether or not one chroma quantization parameter table is to be applied with respect to chroma components, and prediction information and residual information regarding the chroma components; on the basis of the flag, deriving a chroma quantization parameter for the chroma components; deriving residual samples for the chroma components on the basis of the residual information and the chroma quantization parameter; and generating a reconstructed picture on the basis of prediction samples, which have been derived on the basis of the prediction information, and the residual samples.

公开(公告)号：US12225225B2

公开(公告)日：2025-02-11

申请号：US18436984

申请日：2024-02-08

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Hendry Hendry ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/70 ,  H04N19/96

Abstract: A video decoding method can comprise the steps of: acquiring image information from a bitstream, the image information including a picture header related to a current picture, and the current picture including a plurality of slices; parsing, from the picture header, a first flag indicating whether information necessary for an inter prediction operation is in the picture header and/or a second flag indicating whether information necessary for an intra prediction operation is in the picture header; parsing, from the picture header, the information necessary for the inter prediction operation and/or the information necessary for the intra prediction operation based on the first flag and/or the second flag; and generating prediction samples based on the information necessary for the inter prediction operation and/or the information necessary for the intra prediction operation.

公开(公告)号：US12088806B2

公开(公告)日：2024-09-10

申请号：US17629651

申请日：2020-08-20

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

CPC classification number: H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/1883 ,  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：US12081802B2

公开(公告)日：2024-09-03

申请号：US18235485

申请日：2023-08-18

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

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

CPC classification number: H04N19/70 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30 ,  H04N19/172 ,  H04N19/174

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：US12081740B2

公开(公告)日：2024-09-03

申请号：US18127257

申请日：2023-03-28

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Hendry Hendry ,  Jie Zhao ,  Seunghwan Kim

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding device according to this document comprises the steps of: parsing prediction weighted table syntax from a bitstream; parsing information on the number of reference pictures in a reference picture list from the prediction weighted table syntax; deriving weights for weighted prediction on the basis of the information on the number of reference pictures; deriving prediction samples of a current block by performing weighted prediction for the current block on the basis of the weights; and reconstructing a current picture on the basis of the prediction samples, wherein the prediction weighted table syntax may be parsed from a picture header of the bitstream.

公开(公告)号：US20240291968A1

公开(公告)日：2024-08-29

申请号：US18657605

申请日：2024-05-07

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Hendry Hendry ,  Jie Zhao ,  Seunghwan Kim

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/137 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method executed by a video decoding apparatus according to the present document comprises the steps of: parsing a flag associated with weighted prediction from a bitstream; on the basis of the flag, parsing a prediction weighted table syntax from the bitstream; and on the basis of the prediction weighted table syntax, executing a weighted prediction on a current block in a current picture to reconstruct the current picture, wherein on the basis of the value of the flag being 1, the prediction weighted table syntax may be parsed from a picture header of the bitstream, and on the basis of the value of the flag being 0, the prediction weighted table syntax may be parsed from a slice header of the bitstream.

公开(公告)号：US12047579B2

公开(公告)日：2024-07-23

申请号：US17624991

申请日：2020-07-03

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information including chroma quantization parameter data of at least one chroma QP mapping table for chroma components, and prediction information and residual information regarding the chroma components; deriving the chroma QP mapping 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 QP mapping table; deriving prediction samples for the chroma components on the basis of the prediction information; deriving residual samples on the basis of the residual information and the chroma quantization parameter; and generating a reconstructed picture on the basis of the prediction samples and the residual samples.

公开(公告)号：US12034957B2

公开(公告)日：2024-07-09

申请号：US18209926

申请日：2023-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seung Hwan Kim ,  Jie Zhao

IPC: H04N11/02 ,  H04N19/169 ,  H04N19/176 ,  H04N19/503 ,  H04N19/70

CPC classification number: H04N19/503 ,  H04N19/176 ,  H04N19/188 ,  H04N19/70

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise parsing weight information specifying a weight for a reference sample from a bitstream according to a weight parameter syntax structure, and decoding a current block by performing inter prediction based on the weight information. The parsing according to the weight parameter syntax structure may comprise obtaining weight number information specifying the number of weight information obtained from the bitstream according to the weight parameter syntax structure and obtaining weight information from the weight parameter syntax structure based on the weight number information.

公开(公告)号：US12028534B2

公开(公告)日：2024-07-02

申请号：US17615743

申请日：2020-06-03

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/186 ,  H04N19/132 ,  H04N19/184 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/132 ,  H04N19/184 ,  H04N19/70

Abstract: According to the disclosure of the present document, a linear reshaper is used for LMCS and a single chroma residual scaling factor, which is directly signaled during chroma scaling of the LMCS, can be used. In addition, the number of flexible bins can be used for luma mapping so that the resource/cost (of software or hardware) required for an LMCS procedure is minimized, and the latency of coding is removed so that the LMCS procedure can be efficiently performed.