公开(公告)号：US20230156180A1

公开(公告)日：2023-05-18

申请号：US17916371

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/102 ,  H04N19/70 ,  H04N19/169

CPC classification number: H04N19/102 ,  H04N19/70 ,  H04N19/1883

Abstract: An image encoding/decoding method and apparatus for signaling decoded picture buffer (DPB) related information and profile tier level (PTL) related information and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining first information indicating the number of one or more decoded picture buffer (DPB) parameter syntax structures in a video parameter set (VPS), obtaining the one or more DPB parameter syntax structures from the VPS based on the first information, obtaining second information between one or more multi-layer output layer sets (OLSs) and the one or more DPB parameter syntax structures from the VPS based on the first information, selecting a DPB parameter syntax structure that applies to a current OLS based on the second information, and processing the current OLS based on the selected DPB parameter syntax structure.

公开(公告)号：US20230143945A1

公开(公告)日：2023-05-11

申请号：US17919674

申请日：2021-05-11

Applicant: LG Electronics Inc.

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

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

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

Abstract: An image decoding method according to the present document comprises the steps of: receiving an intra-MIP syntax element for a first target block; deriving the value of the intra-MIP syntax element; setting a variable MIP flag for the preset specific area, which is the same as the area of the first target block, on the basis of the value of the intra-MIP syntax element; deriving an intra-prediction mode of the second target block on the basis of the variable MIP flag; and deriving a prediction sample of the second target block on the basis of the intra-prediction mode of the second target block.

公开(公告)号：US20230100733A1

公开(公告)日：2023-03-30

申请号：US17858707

申请日：2022-07-06

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/70 ,  H04N19/176 ,  H04N19/137 ,  H04N19/51 ,  H04N19/46

Abstract: According to the present document, a video decoding method performed by a video decoding apparatus may comprise the steps of: parsing a first flag and a second flag from a bitstream, wherein the first flag is related to whether weighted prediction is applied to slices referring to a picture parameter set, and the second flag is related to whether information relating to the weighted prediction exists in a picture header; parsing a prediction weighted table syntax from the picture header based on the first flag and the second flag; generating prediction samples for a current block in a current picture based on syntax elements within the prediction weighted table syntax; generating residual samples based on residual information; and generating reconstructed samples based on the prediction samples and the residual samples, wherein the second flag is parsed from the picture parameter set based on the first flag.

公开(公告)号：US20230016701A1

公开(公告)日：2023-01-19

申请号：US17623377

申请日：2020-06-24

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/124 ,  H04N19/172 ,  H04N19/70 ,  H04N19/186

Abstract: A method for decoding an image performed by a decoding apparatus, 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：US20220400250A1

公开(公告)日：2022-12-15

申请号：US17774101

申请日：2020-11-05

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: According to the disclosure of this document, it is possible to signal information related to a chroma quantization parameter offset through a palette coding syntax, and to efficiently parse and signal index information for a chroma quantization parameter offset list on the basis of information about the number of entries in 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：US20220353523A1

公开(公告)日：2022-11-03

申请号：US17857285

申请日：2022-07-05

Applicant: LG Electronics Inc.

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

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

Abstract: A video decoding method by a video decoding apparatus, according to the present document, can comprise the steps of: 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：US20220312014A1

公开(公告)日：2022-09-29

申请号：US17731077

申请日：2022-04-27

Applicant: LG ELECTRONICS, INC.

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

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

Abstract: Provided are an image encoding/decoding method and apparatus. The image decoding method performed by the image decoding apparatus according to the present disclosure comprises: a step for determining whether color space transformation can be applied to a residual sample of a current block; a step for determining a quantization parameter of the current block based on whether the color space transformation can be applied; and a step for determining a transformation coefficient of the current block based on the quantization parameter.

公开(公告)号：US20220286701A1

公开(公告)日：2022-09-08

申请号：US17638787

申请日：2020-08-26

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seethal PALURI ,  Seunghwan KIM

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

Abstract: According to the disclosure of the present documents, a quantization parameter used in a scaling process of a quantized escape value in a palette mode may be derived on the basis of minimum quantization parameter information relating to a transform skip mode. Accordingly, the amount of data required to be signaled for video/image coding can be reduced and escape coding in a palette mode can be effectively performed.

公开(公告)号：US20220286700A1

公开(公告)日：2022-09-08

申请号：US17638628

申请日：2020-08-26

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM ,  Seethal PALURI

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: According to the disclosure of the present document, information used in a palette coding mode may be effectively signaled. For example, information relating to availability of a palette mode may be signaled, and information relating to a quantized escape value may be signaled on the basis of the information relating to the availability of the palette mode. In addition, as a quantization parameter for the quantized escape value, minimum quantization parameter information relating to a transform skip mode may be signaled. Accordingly, information required for palette mode coding can be efficiently signaled, and escape coding efficiency in a palette mode can be improved.

公开(公告)号：US20220286678A1

公开(公告)日：2022-09-08

申请号：US17629597

申请日：2020-08-20

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/124 ,  H04N19/70 ,  H04N19/186 ,  H04N19/96 ,  H04N19/176 ,  H04N19/18 ,  H04N19/50 ,  H04N19/61

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: acquiring image information; and generating a reconstruction picture on the basis of the image information.