公开(公告)号：US11606558B2

公开(公告)日：2023-03-14

申请号：US17731031

申请日：2022-04-27

Applicant: LG ELECTRONICS INC.

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

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

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：US11496742B2

公开(公告)日：2022-11-08

申请号：US17556551

申请日：2021-12-20

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/109 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: According to disclosure of the present document, an LMCS procedure can be used for blocks having various block tree structures, and memories used in the LMCS procedure can be reduced (limited).

公开(公告)号：US20220329782A1

公开(公告)日：2022-10-13

申请号：US17843468

申请日：2022-06-17

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Hendry HENDRY ,  Seunghwan Kim ,  Jie Zhao

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

Abstract: A video decoding method performed by a video decoding apparatus according to the present document may comprise the steps of: parsing a prediction weighted table syntax from a bitstream; parsing number information about weighted reference pictures in a reference picture list from the prediction weighted table syntax; deriving a weighting factor-related flag about the reference picture list on the basis of the number information; performing weighted prediction on a current block on the basis of the weighting factor-related flag so as to derive prediction samples of the current block; generating residual samples on the basis of residual information obtained from the bitstream; and reconstructing a current picture on the basis of the prediction samples and the residual samples, wherein the prediction weighted table syntax is parsed from a picture header of the bitstream.

公开(公告)号：US20220295105A1

公开(公告)日：2022-09-15

申请号：US17639129

申请日：2020-08-31

Applicant: LG ELECTRONICS INC.

Inventor： SUNMI YOO ,  Junghak Nam ,  Seunghwan Kim ,  Jie Zhao

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

Abstract: According to the disclosure of the present document, an escape value may be effectively binarized on the basis of a maximum value of an escape value, which may be inferred by a quantization parameter in a palette mode. Accordingly, in a palette mode, the length of a bin may be adjusted or the number bits may be saved, according to a maximum value of an escape value, whereby coding efficiency may be improved.

公开(公告)号：US11425401B2

公开(公告)日：2022-08-23

申请号：US17570857

申请日：2022-01-07

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

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

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：US20220124338A1

公开(公告)日：2022-04-21

申请号：US17432830

申请日：2020-02-26

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/132 ,  H04N19/30 ,  H04N19/169 ,  H04N19/186 ,  H04N19/176

Abstract: According to embodiment(s) disclosed in the present document, a reshaper model used in coding including LMCS can modify a value of a delta codeword on the basis of luma bit depth and perform reshaping on the basis of determination on whether or not a reshaper is linear, and thus, signaling overhead at a higher bit depth and overhead for signaling values of delta codewords for all bins can be reduced.

公开(公告)号：US20210400257A1

公开(公告)日：2021-12-23

申请号：US17352901

申请日：2021-06-21

Applicant: LG Electronics Inc.

Inventor： Jie Zhao ,  Seung Hwan Kim ,  Hendry Hendry

IPC: H04N19/103 ,  H04N19/186 ,  H04N19/136

Abstract: An image encoding/decoding method and apparatus for signaling an ACT or LMCS tool based on a color space and a method of transmitting a bitstream are provided. An image decoding may include determining a color space of a current image, determining whether to enable a predetermined decoding tool based on the color space, and decoding the current image depending on whether to enable the predetermined decoding tool.

公开(公告)号：US12231671B2

公开(公告)日：2025-02-18

申请号：US18380071

申请日：2023-10-13

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

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

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: obtaining image information; and generating a reconstructed picture on the basis of the image information.

公开(公告)号：US12225190B2

公开(公告)日：2025-02-11

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

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：US12206866B2

公开(公告)日：2025-01-21

申请号：US17909943

申请日：2021-03-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/174 ,  H04N19/119 ,  H04N19/46 ,  H04N19/96

Abstract: According to a disclosure of the present document, information/parameter related to splitting of a picture can be signaled on the basis of a no-picture partition flag, information related to a tile, and information related to a slice, unnecessary redundant signaling can be removed accordingly, and the number of bits assigned to the signaling can be reduced, thereby deriving an effect of increasing an overall coding efficiency.