公开(公告)号：US11924447B2

公开(公告)日：2024-03-05

申请号：US18070095

申请日：2022-11-28

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

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

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：US11889111B2

公开(公告)日：2024-01-30

申请号：US17435656

申请日：2020-03-05

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85

Abstract: According to the disclosure of the present document, reshaper data and/or an ALF parameter can be signaled adaptively from a parameter set, thereby reducing the amount of data to be signaled for video/image coding and improving coding efficiency.

公开(公告)号：US11843780B2

公开(公告)日：2023-12-12

申请号：US17736610

申请日：2022-05-04

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/174 ,  H04N19/159 ,  H04N19/132 ,  H04N19/46

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding device according to the present document comprises the steps of: acquiring image information from a bitstream, the image information including a picture header associated with 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 for a decoding process is present in the picture header; parsing, from the picture header, a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; and generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of the first flag or the second flag.

公开(公告)号：US11758141B2

公开(公告)日：2023-09-12

申请号：US17400883

申请日：2021-08-12

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/169 ,  H04N19/46 ,  H04N19/82

CPC classification number: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/188 ,  H04N19/46 ,  H04N19/82

Abstract: According to the present disclosure, ALF parameters and/or LMCS parameters can be hierarchically signaled, which enables a reduction in the amount of data to be signaled for video/image coding and an increase in the coding efficiency.

公开(公告)号：US11722681B2

公开(公告)日：2023-08-08

申请号：US17860625

申请日：2022-07-08

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/86 ,  H04N19/132 ,  H04N19/176 ,  H04N19/169 ,  H04N19/70 ,  H04N19/96 ,  H04N19/186 ,  H04N19/117

CPC classification number: H04N19/186 ,  H04N19/132 ,  H04N19/176 ,  H04N19/1887 ,  H04N19/70 ,  H04N19/96 ,  H04N19/117

Abstract: According to the disclosure of the present document, the resources necessary for an LMCS process may be reduced by limiting the range that an LMCS APS occupies in all APSs. Thus, the degree of complexity in LMCS may be reduced, and video/image coding efficiency may be increased.

公开(公告)号：US11716484B2

公开(公告)日：2023-08-01

申请号：US17839118

申请日：2022-06-13

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/51 ,  H04N19/109 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/51 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding apparatus, according to the present document, comprises the steps of: parsing a flag for weighted prediction from a bitstream; parsing a prediction weighted table syntax from the bitstream on the basis of the flag; generating prediction samples by performing weighted prediction on a current block within a current picture on the basis of the prediction weighted table syntax; and generating reconstructed samples for the current block on the basis of the prediction samples, wherein the prediction weighted table syntax may be parsed from a picture header or slice header of the bitstream on the basis of a value of the flag.

公开(公告)号：US11716483B2

公开(公告)日：2023-08-01

申请号：US17695383

申请日：2022-03-15

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seung Hwan Kim ,  Jie Zhao

IPC: H04N11/02 ,  H04N19/503 ,  H04N19/176 ,  H04N19/169 ,  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：US11695929B2

公开(公告)日：2023-07-04

申请号：US17730529

申请日：2022-04-27

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seung Hwan Kim ,  Hendry Hendry ,  Seethal Paluri

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

CPC classification number: 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：US20230120963A1

公开(公告)日：2023-04-20

申请号：US18072390

申请日：2022-11-30

Applicant: LG Electronics Inc.

Inventor： Jie Zhao ,  Seunghwan Kim

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

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：US11563956B2

公开(公告)日：2023-01-24

申请号：US17566902

申请日：2021-12-31

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

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