公开(公告)号：US11638023B2

公开(公告)日：2023-04-25

申请号：US17546599

申请日：2021-12-09

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: deriving a chroma quantization parameter table on the basis of quantization parameter data; deriving a quantization parameter for combined chroma coding on the basis of the chroma quantization parameter table; deriving prediction samples of a current chroma block on the basis of prediction information; deriving transform coefficients of the current chroma block on the basis of residual information; deriving residual samples by dequantizing the transform coefficients on the basis of the quantization parameter; and generating a reconstructed picture on the basis of the prediction samples and the residual samples.

公开(公告)号：US11595639B2

公开(公告)日：2023-02-28

申请号：US17277926

申请日：2019-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Jane Zhao ,  Seethal Paluri ,  Seunghwan Kim

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

Abstract: Disclosed are a method for processing video signals and an apparatus therefor. Specifically, the method for processing video signals on the basis of inter prediction comprises the steps of: inducing a motion vector predictor using motion data of a neighboring block of the current block; parsing layer data indicating the current layer to which a motion vector difference used in inter prediction of the current block belongs, in a previously defined layer structure in which the combination of one or more horizontal and vertical components of motion vector differences are divided into multiple layers; parsing index data indicating a particular combination within the current layer; inducing a motion vector difference of the current block using the layer data and index data; and inducing the motion vector for the current block by adding the motion vector difference to the motion vector predictor.

公开(公告)号：US11470315B2

公开(公告)日：2022-10-11

申请号：US17495718

申请日：2021-10-06

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/50

Abstract: An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: receiving a bitstream containing at least one of segmentation information of a current picture and prediction information for a current block included in the current picture; deriving a first segmentation structure of the current picture, which is based on multiple tiles, on the basis of the segmentation information of the current picture including at least one of information of the number of width-parsing columns, information of the last width, information of the number of height-parsing rows, and information of the last height; deriving a block predicted for the current block, on the basis of the prediction information for the current block contained in one of the multiple tiles; and generating reconstruction samples for the current block on the basis of the predicted block.

公开(公告)号：US20220217361A1

公开(公告)日：2022-07-07

申请号：US17579108

申请日：2022-01-19

Applicant: LG ELECTRONICS INC.

Inventor： Jane ZHAO ,  Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/137 ,  H04N19/105

Abstract: The disclosure discloses a method for processing a video signal and an apparatus therefor. Specifically, a method of processing a video signal based on inter prediction includes constructing a first merge candidate list of a current block using a spatial merge candidate and temporal merge candidate of the current block, constructing a second merge candidate list by adding a history-based merge candidate indicating motion information of a block coded prior to the current block to the first merge candidate list, obtaining a merge index indicating a merge candidate applied to the current block within the second merge candidate list, and generating a prediction block of the current block using motion information of a merge candidate indicated by the merge index. The history-based merge candidate may be added to the first merge candidate list if the history-based merge candidate has motion information not overlapping motion information of a pre-defined merge candidate among merge candidates included in the first merge candidate list.

公开(公告)号：US11184618B2

公开(公告)日：2021-11-23

申请号：US16904985

申请日：2020-06-18

Applicant: LG Electronics Inc.

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

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

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：US12294716B2

公开(公告)日：2025-05-06

申请号：US18441587

申请日：2024-02-14

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/136 ,  H04N19/103 ,  H04N19/186 ,  H04N19/70 ,  H04N19/82

Abstract: An image encoding/decoding method and apparatus for signaling a high level syntax (HLS) and a method of transmitting a bitstream are provided. An image decoding method according to the present disclosure may include obtaining first information indicating whether to constrain luma mapping with chroma scaling (LMCS), obtaining second information indicating whether LMCS for a current video sequence is allowed, and reconstructing a current picture within the current video sequence based on the second information. A value of the second information may be determined based on a value of the first information.

公开(公告)号：US12294712B2

公开(公告)日：2025-05-06

申请号：US18399123

申请日：2023-12-28

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Seethal Paluri ,  Seunghwan Kim

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

Abstract: A method by which a video decoding device decodes a video, according to the present document, can comprise the steps of: parsing, from a bitstream, number information related to the number of slices of which the height within a tile of a current picture is explicitly signaled; parsing, from the bitstream, on the basis of the number information, height information related to the height of the slices of which the height is explicitly signaled; deriving the number of slices in the tile on the basis of the number information and the height information; generating prediction samples by predicting the current block of the current picture on the basis of the slices within the tile; generating reconstructed samples on the basis of the prediction samples; and generating a reconstructed picture for the current picture on the basis of the reconstructed samples.

公开(公告)号：US12278979B2

公开(公告)日：2025-04-15

申请号：US18414182

申请日：2024-01-16

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/159 ,  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: deriving a chroma quantization parameter table on the basis of quantization parameter data; deriving a quantization parameter for combined chroma coding on the basis of the chroma quantization parameter table; deriving prediction samples of a current chroma block on the basis of prediction information; deriving transform coefficients of the current chroma block on the basis of residual information; deriving residual samples by dequantizing the transform coefficients on the basis of the quantization parameter; and generating a reconstructed picture on the basis of the prediction samples and the residual samples.

公开(公告)号：US12278963B2

公开(公告)日：2025-04-15

申请号：US18660654

申请日：2024-05-10

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

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

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：US12273536B2

公开(公告)日：2025-04-08

申请号：US18403388

申请日：2024-01-03

Applicant: LG ELECTRONICS INC.

Inventor： Jane Zhao ,  Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: The disclosure discloses a method for processing a video signal and an apparatus therefor. Specifically, a method of processing a video signal based on inter prediction includes constructing a first merge candidate list of a current block using a spatial merge candidate and temporal merge candidate of the current block, constructing a second merge candidate list by adding a history-based merge candidate indicating motion information of a block coded prior to the current block to the first merge candidate list, obtaining a merge index indicating a merge candidate applied to the current block within the second merge candidate list, and generating a prediction block of the current block using motion information of a merge candidate indicated by the merge index. The history-based merge candidate may be added to the first merge candidate list if the history-based merge candidate has motion information not overlapping motion information of a pre-defined merge candidate among merge candidates included in the first merge candidate list.