公开(公告)号：US20230199191A1

公开(公告)日：2023-06-22

申请号：US17916452

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/136 ,  H04N19/70 ,  H04N19/186 ,  H04N19/103 ,  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：US20230188714A1

公开(公告)日：2023-06-15

申请号：US17925782

申请日：2021-06-09

Applicant: LG ELECTRONICS INC

Inventor： Hendry HENDRY ,  Seung Hwan KIM ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Seethal PALURI

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/82 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus for signaling an identifier for an APS and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining adaptive parameter set (APS) parameter type information specifying an APS parameter type signaled by an APS, obtaining APS identifier information specifying the APS after obtaining the APS parameter type information, and reconstructing an image based on the APS identifier information.

公开(公告)号：US20230179770A1

公开(公告)日：2023-06-08

申请号：US17924536

申请日：2021-05-11

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seunghwan KIM ,  Seethal PALURI

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/169 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/188 ,  H04N19/176 ,  H04N19/70

Abstract: A method by which a video decoding device decodes a video, according to the present document, comprises the steps of: acquiring, from a bitstream, image information including video coding layer (VCL) network abstraction layer (NAL) units; performing inter prediction or intra prediction on the current block within the current picture on the basis of the image information to generate prediction samples about the current block; and restoring the current block on the basis of the prediction samples, wherein the image information includes an sps_video_parameter_set_id syntax element indicating the value of an identifier of a video parameter set, and, on the basis of that the value of the sps_video_parameter_set_id syntax element is 1, the value of the entire output layer set (OLS) number and the value of the number of layers within the OLS, specified by the video parameter set can be derived to be 1.

公开(公告)号：US20230055810A1

公开(公告)日：2023-02-23

申请号：US17966238

申请日：2022-10-14

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：US20230055747A1

公开(公告)日：2023-02-23

申请号：US17970752

申请日：2022-10-21

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/46 ,  H04N19/132 ,  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: obtaining image information; and generating a reconstructed picture on the basis of the image information.

公开(公告)号：US20230023712A1

公开(公告)日：2023-01-26

申请号：US17837895

申请日：2022-06-10

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/172 ,  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：US20230007310A1

公开(公告)日：2023-01-05

申请号：US17777371

申请日：2020-11-17

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/82 ,  H04N19/70 ,  H04N19/132 ,  H04N19/172 ,  H04N19/167 ,  H04N19/117

Abstract: A decoding method performed by a decoding apparatus, according to embodiments of the present document, may comprise the steps of: acquiring, via a bitstream, image information including residual information; generating reconstructed samples of a current picture on the basis of the residual information; and generating modified reconstructed samples by performing an in-loop filtering procedure on the reconstructed samples of the current picture, wherein whether or not the in-loop filtering procedure is performed across virtual boundaries is determined. The virtual boundaries can bring, to the decoding apparatus, advantages from a hardware perspective.

公开(公告)号：US20230007278A1

公开(公告)日：2023-01-05

申请号：US17780476

申请日：2020-11-26

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/174 ,  H04N19/70 ,  H04N19/159 ,  H04N19/132 ,  H04N19/91

Abstract: A video decoding method performed by a video decoding apparatus, according to the present document, comprises: parsing number information about the number of slices of which heights are explicitly signaled in a tile of a current picture from a bitstream; parsing height information about the heights of slices of which heights are explicitly signaled from the bitstream based on the number information; deriving the number of slices in the tile based on the number information and the height information; and decoding the current picture based on the slices in the tile, wherein the height information includes the same number of syntax elements as a value of the number information, and based on the value of the number information being n, the heights of a 0th slice to an n-1th slice in the tile may be derived based on the syntax elements.

公开(公告)号：US20220408103A1

公开(公告)日：2022-12-22

申请号：US17623386

申请日：2020-06-24

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

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

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：US20220337836A1

公开(公告)日：2022-10-20

申请号：US17731031

申请日：2022-04-27

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/124 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70 ,  H04N19/186 ,  H04N19/60 ,  H04N19/132

Abstract: Provided are an image encoding/decoding method and device. An image decoding method performed by an image decoding device according to the present disclosure includes the steps of: determining a quantization parameter of the current block on the basis of whether color space conversion is applied to a residual sample of the current block; determining a transform coefficient of the current block on the basis of the quantization parameter; determining the residual sample of the current block by using the transform coefficient; and resetting the value of the residual sample on the basis of whether the color space conversion is applied.