公开(公告)号：US20230047287A1

公开(公告)日：2023-02-16

申请号：US17969175

申请日：2022-10-19

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

IPC: H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/86

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise deriving a reconstructed block for a current block, deriving a target boundary for the reconstructed block, determining a filter length of a deblocking filter to be applied for the target boundary, and applying the deblocking filter for the target boundary based on the determined filter length. The filter length may be determined based on at least one of a width or height of a transform block adjacent to the target boundary.

公开(公告)号：US20230038610A1

公开(公告)日：2023-02-09

申请号：US17962223

申请日：2022-10-07

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/159 ,  H04N19/103 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise obtaining a current block by splitting an image, determining prediction mode characteristic information based on encoding information of the current block, determining a prediction mode type of a lower-layer block split from the current block based on the prediction mode characteristic information, obtaining the lower-layer block by splitting the current block, and decoding the lower-layer block based on the determined prediction mode type of the lower-layer block. The prediction mode characteristic information may be determined based on a color format of the current block.

公开(公告)号：US20220279189A1

公开(公告)日：2022-09-01

申请号：US17474919

申请日：2021-09-14

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jin HEO ,  Jung Hak NAM ,  Jangwon CHOI

IPC: H04N19/136 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether to apply intra prediction to a current chroma block based on information on prediction of the current chroma block, deriving an intra prediction mode of the current chroma block based on an intra prediction mode of a corresponding luma block corresponding to the current chroma block and intra chroma prediction mode information of the current chroma block, when intra prediction applies to the current chroma block, and generating a prediction block of the current chroma block, by performing intra prediction based on the intra prediction mode of the current chroma block. When the intra prediction mode of the corresponding luma block is not present, the intra prediction mode of the current chroma block is derived based on a default intra prediction mode.

公开(公告)号：US20220239937A1

公开(公告)日：2022-07-28

申请号：US17677410

申请日：2022-02-22

Applicant: LG Electronics Inc.

Inventor： Nae Ri PARK ,  Jung Hak NAM ,  Hyeong Moon JANG

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/174

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a first flag specifying whether to perform weighted prediction on a current block and a weight index BcwIdx of bi-prediction with CU-level weight (BCW) for the current block, determining whether to perform default weighted prediction or explicit weighted prediction on the current block based on the first flag and BcwIdx, and generating a prediction block for the current block by performing the determined method.

公开(公告)号：US20220224912A1

公开(公告)日：2022-07-14

申请号：US17607231

申请日：2020-05-12

Applicant: LG Electronics Inc.

Inventor： Nae Ri PARK ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/52 ,  H04N19/577 ,  H04N19/105 ,  H04N19/593 ,  H04N19/159

Abstract: An image encoding/decoding apparatus and method are provided. An image decoding method performed by an image decoding apparatus according to the present disclosure may comprise deriving a motion shift of a current block using motion information of a neighboring block of the current block, determining a collocated block of the current block using the motion shift, deriving a motion vector for at least one control point (CP) of the determined collocated block, and deriving at least one control point motion vector (CPMV) of the current block using the motion vector for the at least one CP.

公开(公告)号：US20220201293A1

公开(公告)日：2022-06-23

申请号：US17579145

申请日：2022-01-19

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/86 ,  H04N19/119

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise deriving a reconstructed block for a current block, deriving a target boundary for the reconstructed block, determining a filter length of a deblocking filter to be applied for the target boundary, and applying the deblocking filter for the target boundary based on the determined filter length. The filter length may be determined based on at least one of a width or height of a transform block adjacent to the target boundary.

公开(公告)号：US20220174303A1

公开(公告)日：2022-06-02

申请号：US17437651

申请日：2020-03-11

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/46 ,  H04N19/107 ,  H04N19/159 ,  H04N19/176

Abstract: An image decoding method is disclosed. The image decoding method includes determining a prediction mode of a current block based on prediction mode information of the current block obtained from a bitstream, obtaining a transform coefficient block of the current block from the bitstream, dequantizing the transform coefficient to generate a dequantized transform coefficient block, determining a transform kernel for the dequantized transform coefficient block, and generating a residual block of the current block by performing inverse transform on the dequantized transform coefficient block using the transform kernel.

公开(公告)号：US20220166986A1

公开(公告)日：2022-05-26

申请号：US17438003

申请日：2020-03-13

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jung Hak NAM

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/137 ,  H04N19/186 ,  H04N19/119

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether a prediction mode of a current block is an intra block copy (IBC) mode based on information on the prediction mode of the current block, based on the prediction mode of the current block being an IBC mode, deriving motion information of the current block based on motion information of a corresponding block corresponding to the current block, and generating a prediction block for the current block, by performing IBC prediction based on the derived motion information of the current block. Based on absence of motion information of the corresponding block, the motion information of the current block is derived based on default motion information.