公开(公告)号：US12081740B2

公开(公告)日：2024-09-03

申请号：US18127257

申请日：2023-03-28

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding device according to this document comprises the steps of: parsing prediction weighted table syntax from a bitstream; parsing information on the number of reference pictures in a reference picture list from the prediction weighted table syntax; deriving weights for weighted prediction on the basis of the information on the number of reference pictures; deriving prediction samples of a current block by performing weighted prediction for the current block on the basis of the weights; and reconstructing a current picture on the basis of the prediction samples, wherein the prediction weighted table syntax may be parsed from a picture header of the bitstream.

公开(公告)号：US20240291968A1

公开(公告)日：2024-08-29

申请号：US18657605

申请日：2024-05-07

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/137 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method executed by a video decoding apparatus according to the present document comprises the steps of: parsing a flag associated with weighted prediction from a bitstream; on the basis of the flag, parsing a prediction weighted table syntax from the bitstream; and on the basis of the prediction weighted table syntax, executing a weighted prediction on a current block in a current picture to reconstruct the current picture, wherein on the basis of the value of the flag being 1, the prediction weighted table syntax may be parsed from a picture header of the bitstream, and on the basis of the value of the flag being 0, the prediction weighted table syntax may be parsed from a slice header of the bitstream.

公开(公告)号：US12047579B2

公开(公告)日：2024-07-23

申请号：US17624991

申请日：2020-07-03

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/00 ,  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：US12034957B2

公开(公告)日：2024-07-09

申请号：US18209926

申请日：2023-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seung Hwan Kim ,  Jie Zhao

IPC: H04N11/02 ,  H04N19/169 ,  H04N19/176 ,  H04N19/503 ,  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：US12034933B2

公开(公告)日：2024-07-09

申请号：US18122552

申请日：2023-03-16

Applicant: LG ELECTRONICS INC.

Inventor： Mehdi Salehifar ,  Seunghwan Kim ,  Moonmo Koo ,  Jaehyun Lim ,  Seethal Paluri

IPC: H04N19/18 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18

Abstract: A method for decoding an image by a decoding device according to the present invention comprises the steps of: deriving, from a bit stream, transform coefficients of a block to be decoded; deriving residual samples of the block to be decoded, on the basis of a selective transform of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples of the block to be decoded and prediction samples of the block to be decoded, wherein the selective transform is performed on the basis of a modified transform matrix, the modified transform matrix comprises a matrix including a modified basis vector, and the modified basis vector contains a certain number of elements selected from N elements.

公开(公告)号：US12028528B2

公开(公告)日：2024-07-02

申请号：US18131763

申请日：2023-04-06

Applicant: LG ELECTRONICS INC.

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

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

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

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, comprises the steps of determining a current block by splitting an image on the basis of split information acquired from a bitstream; determining a quantization parameter of the current block; and determining a transform coefficient of the current block on the basis of the quantization parameter.

公开(公告)号：US12022128B2

公开(公告)日：2024-06-25

申请号：US17858707

申请日：2022-07-06

Applicant: LG Electronics Inc.

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

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

CPC classification number: H04N19/70 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/51 ,  H04N19/132

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：US12015792B2

公开(公告)日：2024-06-18

申请号：US17623386

申请日：2020-06-24

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/186 ,  H04N19/107 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/18 ,  H04N19/61 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/107 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/18 ,  H04N19/61 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information comprising a flag indicating whether or not one chroma quantization parameter table is to be applied with respect to chroma components, and prediction information and residual information regarding the chroma components; on the basis of the flag, deriving a chroma quantization parameter for the chroma components; deriving residual samples for the chroma components on the basis of the residual information and the chroma quantization parameter; and generating a reconstructed picture on the basis of prediction samples, which have been derived on the basis of the prediction information, and the residual samples.

公开(公告)号：US12010336B2

公开(公告)日：2024-06-11

申请号：US17419869

申请日：2019-12-31

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Mehdi Salehifar

IPC: H04N19/52 ,  H04N19/137 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/52 ,  H04N19/137 ,  H04N19/176 ,  H04N19/70

Abstract: A method and device for processing a video signal are disclosed. More specifically, a method of processing a video signal based on inter prediction may comprise: deriving a motion vector predictor based on motion information of a neighboring block of a current block; deriving a motion vector difference of the current block based on layer information and index information; deriving a motion vector of the current block based on the motion vector predictor and the motion vector difference; generating a prediction block of the current block based on the motion vector of the current block; and generating a reconstructed block of the current block based on the prediction block and a residual block of the current block, wherein the layer information includes at least one syntax element indicating a layer group to which the current layer belongs.

公开(公告)号：US11968401B2

公开(公告)日：2024-04-23

申请号：US17600001

申请日：2020-03-19

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Jie Zhao ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/70 ,  H04N19/117 ,  H04N19/159 ,  H04N19/169 ,  H04N19/176 ,  H04N19/82

CPC classification number: H04N19/70 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/1887 ,  H04N19/82

Abstract: According to the disclosure of the present document, an image decoding method performed by a decoding device comprises the steps of: acquiring, through a bitstream, image information including prediction mode information and residual information; deriving a prediction mode of a current block on the basis of the prediction mode information; deriving prediction samples on the basis of the prediction mode; deriving residual samples on the basis of the residual information; generating reconstruction samples on the basis of the prediction samples and the residual samples; deriving filter coefficients for an adaptive loop filter (ALF) procedure for the reconstruction samples; and generating modified reconstruction samples on the basis of the reconstruction samples and the filter coefficients, wherein the image information includes a first adaptation parameter set (APS) including an ALF data field, and the ALF data field includes ALF parameters used to derive the filter coefficients.