公开(公告)号：US20220159279A1

公开(公告)日：2022-05-19

申请号：US17598123

申请日：2020-04-07

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM

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

Abstract: According to a disclosure of the present document, scaling list data and scaling list-related information may be hierarchically signaled, and through same, the amount of data which must be signaled for video/image coding may be reduced, and coding efficiency may be increased.

公开(公告)号：US20220132107A1

公开(公告)日：2022-04-28

申请号：US17570882

申请日：2022-01-07

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/105 ,  H04N19/70 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  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：US20220109888A1

公开(公告)日：2022-04-07

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 ,  H04N19/159 ,  H04N19/176 ,  H04N19/82 ,  H04N19/117 ,  H04N19/169

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.

公开(公告)号：US20220103821A1

公开(公告)日：2022-03-31

申请号：US17546507

申请日：2021-12-09

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/186 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a flag indicating whether quantization parameter data for combined chroma coding is present on the basis of a type of chroma; obtaining the quantization parameter data for the combined chroma coding on the basis of the flag; deriving a chroma quantization parameter table on the basis of the quantization parameter data; deriving a quantization parameter for the combined chroma coding on the basis of the chroma quantization parameter table; deriving residual samples on the basis of the quantization parameter; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20210360227A1

公开(公告)日：2021-11-18

申请号：US17277926

申请日：2019-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Jane ZHAO ,  Seethal PALURI ,  Seunghwan KIM

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

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：US20210266526A1

公开(公告)日：2021-08-26

申请号：US17306212

申请日：2021-05-03

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Seunghwan Kim

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/70

Abstract: Embodiments of the disclosure provide methods and devices for decoding video signals using inter prediction. According to an embodiment of the disclosure, a method for processing a video signal comprises constructing a reference picture list of a current picture in the video signal and performing a prediction for a current picture by using the reference picture list, wherein constructing the reference picture list comprising, if a first entry of the reference picture list corresponds to a short-term reference picture (STRP), obtaining a picture order count (POC) difference between a picture related to the first entry and another picture, and if a second entry of the reference picture list corresponds to a long-term reference picture (LTRP), obtaining a POC modulo value of a picture related to the second entry. A reference picture list for identifying a picture may be generated in a simplified and effective manner. Thus, the compression performance may be increased, and the computation time may be decreased.

公开(公告)号：US20200296414A1

公开(公告)日：2020-09-17

申请号：US16767925

申请日：2018-11-28

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Seethal PALURI ,  Junghak NAM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

IPC: H04N19/56 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

Abstract: An image decoding method that is performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining information regarding inter-prediction of a current block via a bitstream; forming an MVP candidate list based on neighbouring blocks of the current block; deriving costs with respect to MVP candidates that are included in the MVP candidate list; deriving a revised MVP candidate list based on the costs with respect to the MVP candidates; deriving MVP of the current block based on the revised MVP candidate list; deriving a motion vector of the current block based on the MVP and MVD of the current block; and performing prediction on the current block based on a reference picture index and the motion vector of the current block, wherein the information regarding inter-prediction includes the reference picture index and the MVD.

公开(公告)号：US20250126240A1

公开(公告)日：2025-04-17

申请号：US18727021

申请日：2023-01-06

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Seethal PALURI ,  Jie ZHAO

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/577

Abstract: According to a present disclosure, an image decoding method performed by a decoding apparatus, the image decoding method comprising obtaining image information including inter prediction-related information of a current block from a bitstream; configuring at least one of a merge list of the current block and an advanced motion vector prediction (AMVP) list of the current block for inter prediction; deriving motion information of the current block on the basis of the at least one of the merge list of the current block and the AMVP list of the current block; generating prediction samples for the current block based on the motion information of the current block; and generating reconstruction samples for the current block based on the prediction samples for the current block, wherein the merge list includes at least one of a primary merge list and a secondary merge list (SML).

公开(公告)号：US20250113022A1

公开(公告)日：2025-04-03

申请号：US18977335

申请日：2024-12-11

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46

Abstract: According to embodiments described herein, sub-pictures and/or virtual boundaries can be used for coding an image. For example, sub-pictures in the current picture can be used for predicting, reconstructing, and/or filtering the current picture. Virtual boundaries can be used for filtering reconstructed samples of the current picture. Through image coding based on the subpictures and/or virtual boundaries according to embodiments described herein, the subjective/objective quality of an image can be improved, and the consumption of hardware resources necessary for the coding can be reduced.

公开(公告)号：US20250080762A1

公开(公告)日：2025-03-06

申请号：US18883138

申请日：2024-09-12

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Hendry HENDRY ,  Seung Hwan KIM

IPC: H04N19/423 ,  H04N19/70

Abstract: Disclosed herein are an image encoding and decoding method and apparatus for signaling information on the number of DPB parameters, and a recording medium storing a bitstream. An image decoding method may comprise obtaining first information indicating the number of decoded picture buffer (DPB) parameter syntax structures in a video parameter set (VPS), computing the number of DPB parameter syntax structures in the VPS based on the first information, obtaining the DPB parameter syntax structures in the VPS based on the number of DPB parameter syntax structures, and managing a DPB based on the DPB parameter syntax structures.