公开(公告)号：US20240195970A1

公开(公告)日：2024-06-13

申请号：US18583100

申请日：2024-02-21

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seunghwan KIM ,  Jie ZHAO

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

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

Abstract: According to the disclosure of the present document, chroma quantization parameter offset-related information may be signaled via a palette coding syntax, and index information about a chroma quantization parameter offset list may be efficiently parsed/signaled on the basis of information about the number of entries within the chroma quantization parameter offset list. Accordingly, bits that need to be signaled for video/image coding can be reduced, and coding efficiency can be improved.

公开(公告)号：US20240155138A1

公开(公告)日：2024-05-09

申请号：US18410371

申请日：2024-01-11

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/157 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/186 ,  H04N19/157 ,  H04N19/176 ,  H04N19/46

Abstract: According to the disclosure of the present document, by explicitly signaling information relating to a value(s) of a chroma residual scaling factor, accuracy in an LMCS procedure can be increased, and therefore a subjective/objective image quality of a coded image/video can be further improved.

公开(公告)号：US20240146966A1

公开(公告)日：2024-05-02

申请号：US18286648

申请日：2022-04-12

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Jaehyun LIM ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/61 ,  H04N19/11 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/593

Abstract: According to the disclosure of the present disclosure: an LFNST set index for a current block may be derived on the basis of an intra prediction mode on the basis of the intra prediction mode for the current block being a WAIP mode, the LFNST set index may be derived as predetermined one value; and on the basis of the intra prediction mode for the current block being an NAIP mode, the LFNST set index may be derived as one of predetermined N values. Accordingly, it is possible to maximize the coding performance that can be brought about by LFNST within the implementation complexity allowed by a next standard.

公开(公告)号：US20240137560A1

公开(公告)日：2024-04-25

申请号：US18278758

申请日：2022-02-24

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Seethal PALURI ,  Jie ZHAO

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

Abstract: According to one embodiment of the present document, a method by which a decoding device decodes an image is provided. The method comprises the steps of: acquiring, from a bitstream, image information including decoder side intra mode derivation (DIMD)-related information; determining whether a DIMD mode is applied to the current block on the basis of the DIMD-related information; deriving an intra prediction mode for the current block on the basis of the determined result; and generating prediction samples for the current block on the basis of the intra prediction mode.

公开(公告)号：US20240129456A1

公开(公告)日：2024-04-18

申请号：US18532578

申请日：2023-12-07

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70 ,  H04N19/82

CPC classification number: H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70 ,  H04N19/82

Abstract: According to the disclosure of the present document, scaling list data transmitted from an adaptation parameter set (APS) can be signaled through a hierarchical structure. In addition, by setting a limit on the scaling list data transmitted from the APS, it is possible to reduce the amount of data which has to be signaled for video/image coding, and facilitate implementation.

公开(公告)号：US20240048733A1

公开(公告)日：2024-02-08

申请号：US17795155

申请日：2021-01-25

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/18 ,  H04N19/60

CPC classification number: H04N19/186 ,  H04N19/18 ,  H04N19/60

Abstract: According to the disclosure of the present document, it is possible to derive a residual sample by applying an adaptive color transform (ACT) to a current block on the basis of ACT related information, and at this time, the residual sample is derived through clipping on the basis of a clipping range, and the clipping range is determined on the basis of the bit depth.

公开(公告)号：US20230319295A1

公开(公告)日：2023-10-05

申请号：US18135291

申请日：2023-04-17

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

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

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

Abstract: According to the disclosure of the present document, scaling list data transferred from an adaptation parameter set (APS) can be signaled through a hierarchical structure, and restrictions are placed on the scaling list data transferred from the APS, whereby the amount of data to be signaled for video/image coding can be reduced, and easiness in implementation can be provided.

公开(公告)号：US20230262218A1

公开(公告)日：2023-08-17

申请号：US18139034

申请日：2023-04-25

Applicant: LG Electronics Inc.

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

IPC: H04N19/12 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186

CPC classification number: H04N19/12 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186

Abstract: An image encoding/decoding method and device are provided. An image decoding method performed by an image decoding device according to the present disclosure may comprise the steps of: determining a prediction mode of the current block on the basis of prediction information obtained from a bitstream; on the basis of the prediction mode of the current block, obtaining a flag indicating whether a color space transform is applied to a residual sample of the current block; determining a quantization parameter of the current block on the basis of the flag; and determining a transform coefficient of the current block on the basis of the quantization parameter.

公开(公告)号：US20230171404A1

公开(公告)日：2023-06-01

申请号：US18096414

申请日：2023-01-12

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

Abstract: Provided are an image encoding/decoding method and device. An image decoding method performed by an image decoding device according to the present disclosure includes the steps of: determining a quantization parameter of the current block on the basis of whether color space conversion is applied to a residual sample of the current block; determining a transform coefficient of the current block on the basis of the quantization parameter; determining the residual sample of the current block by using the transform coefficient; and resetting the value of the residual sample on the basis of whether the color space conversion is applied.

公开(公告)号：US20230078305A1

公开(公告)日：2023-03-16

申请号：US17985507

申请日：2022-11-11

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Jie ZHAO ,  Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding method according to the present document may comprise the steps of: receiving image information including residual information and an LFNST index from a bitstream; deriving a transform coefficient on the basis of the residual information; deriving a flag variable related to whether LFNST is applied to a current block on the basis of the LFNST index; and performing the LFNST on the basis of the flag variable and the transform coefficient, wherein the flag variable is derived for each color component of the current block.