公开(公告)号：US20240275974A1

公开(公告)日：2024-08-15

申请号：US18637712

申请日：2024-04-17

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: 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：US20240146930A1

公开(公告)日：2024-05-02

申请号：US18535517

申请日：2023-12-11

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

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

CPC classification number: 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：US20240129510A1

公开(公告)日：2024-04-18

申请号：US18391365

申请日：2023-12-20

Applicant: LG Electronics Inc.

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

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

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

Abstract: A video decoding method by a video decoding apparatus includes: parsing, from a picture parameter set of a bitstream, a first flag related to whether a weighted prediction is applied to slices referring to the picture parameter set; parsing, from the picture parameter set, a second flag related to whether information about the weighted prediction is present in a picture header of the bitstream or is present in a slice header of the bitstream based on the first flag; parsing a prediction weighted table syntax from the picture header or the slice header based on the first flag and the second flag; generating prediction samples for the current block by performing weighted prediction for the current block in a current picture based on syntax elements in the prediction weighted table syntax; and generating reconstructed samples based on the prediction samples.

公开(公告)号：US20240073434A1

公开(公告)日：2024-02-29

申请号：US18368935

申请日：2023-09-15

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan Kim

IPC: H04N19/186 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

CPC classification number: H04N19/186 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/70

Abstract: According to the disclosure of the present document, an ID value of an LMCS APS may be within a predetermined range. Thus, an LMCS procedure can be efficiently performed, and the complexity of LMCS is reduced. Since the performance of LMCS is improved, efficiency of video/image coding may increase.

公开(公告)号：US20230328268A1

公开(公告)日：2023-10-12

申请号：US18209926

申请日：2023-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Seung Hwan KIM ,  Jie ZHAO

IPC: 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：US20230328264A1

公开(公告)日：2023-10-12

申请号：US18209140

申请日：2023-06-13

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

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

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：US20230125278A1

公开(公告)日：2023-04-27

申请号：US18070095

申请日：2022-11-28

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: 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：US20230123604A1

公开(公告)日：2023-04-20

申请号：US18071156

申请日：2022-11-29

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/105 ,  H04N19/176 ,  H04N19/30 ,  H04N19/593

Abstract: According to the disclosure of the present document, a chroma residual scaling factor is derived on the basis of information relating to an absolute value of a chroma residual scaling delta value and information relating to a sign of the chroma residual scaling delta value, and an LMCS procedure can be efficiently performed by applying explicit signaling to information relating to a value(s) of the chroma residual scaling factor.

公开(公告)号：US20220394302A1

公开(公告)日：2022-12-08

申请号：US17774071

申请日：2020-11-05

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/124 ,  H04N19/159 ,  H04N19/103 ,  H04N19/50 ,  H04N19/132 ,  H04N19/176 ,  H04N19/169

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

公开(公告)号：US20220360801A1

公开(公告)日：2022-11-10

申请号：US17853346

申请日：2022-06-29

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/109 ,  H04N19/159 ,  H04N19/172 ,  H04N19/96

Abstract: According to a disclosure of the present document, image information including prediction mode information and information associated with luma mapping with chroma scaling (LMCS) is acquired from a bitstream, wherein the image information includes LMCS adaptation parameter sets (APSs), and by limiting the range of APS ID information included in the LMCS APSs, a memory used in a LMCS procedure may be reduced (limited).