公开(公告)号：US12206887B2

公开(公告)日：2025-01-21

申请号：US18651227

申请日：2024-04-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hui Yong Kim ,  Jin Ho Lee ,  Sung Chang Lim ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/182 ,  H04N19/196 ,  H04N19/42 ,  H04N19/51 ,  H04N19/52 ,  H04N19/593 ,  H04N19/82

Abstract: An image decoding method according to the present invention includes reconstructing a residual block by inverse-quantizing and inverse-transforming an entropy-decoded residual block, generating a prediction block by performing intra prediction on a current block, and reconstructing an picture by adding the reconstructed residual block to the prediction block, wherein generating the prediction block includes generating a final prediction value of a prediction target pixel included in the current block based on a first prediction value of the prediction target pixel and a final correction value calculated by performing an arithmetic right shift on a two's complementary integer representation for an initial correction value of the prediction target pixel by a binary digit of 1. Accordingly, upon image encoding/decoding, computation complexity may be reduced.

公开(公告)号：US20250022178A1

公开(公告)日：2025-01-16

申请号：US18770167

申请日：2024-07-11

Applicant: Electronics and Telecommunications Research Institute ,  UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY

Inventor： Joo Young LEE ,  Se Yoon Jeong ,  Youn Hee Kim ,  Jin Soo Choi ,  Jung Won Kang ,  Hye Won Jeong ,  Hui Yong Kim ,  Jang Hyun Yu ,  Seung Hwan Jang ,  Hyun Dong Cho

IPC: G06T9/00 ,  G06T3/40 ,  G06V10/44

Abstract: The present disclosure relates to an image encoding/decoding method for a machine and a device therefor. An image encoding method according to the present disclosure includes extracting an encoding method feature from an encoding input signal; determining an encoding method that is optimal for the encoding input signal based on the encoding method feature; transforming the encoding input signal based on the encoding method; and encoding an encoding target signal generated by transforming encoding method information and the encoding input signal.

公开(公告)号：US12200221B2

公开(公告)日：2025-01-14

申请号：US18464472

申请日：2023-09-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Chang Lim ,  Jung Won Kang ,  Hyun Suk Ko ,  Jin Ho Lee ,  Ha Hyun Lee ,  Dong San Jun ,  Seung Hyun Cho ,  Hui Yong Kim ,  Jin Soo Choi

IPC: H04N19/124 ,  H04N19/105 ,  H04N19/13 ,  H04N19/137 ,  H04N19/146 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/51 ,  H04N19/513 ,  H04N19/91

Abstract: The present invention relates to a video encoding and decoding method. A video decoding method for the same may include: obtaining granularity information; determining a sharing region based on the granularity information; and generating a prediction block of a current block by using motion information of the sharing region when the current block corresponds to the sharing region.

公开(公告)号：US12200203B2

公开(公告)日：2025-01-14

申请号：US17879237

申请日：2022-08-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Ho Lee ,  Jung Won Kang ,  Ha Hyun Lee ,  Sung Chang Lim ,  Hui Yong Kim

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/593

Abstract: An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprise deriving an intra-prediction mode of a current block by using an intra-prediction mode of a neighbor block adjacent to the current block, configuring a reference sample of the current block, and performing intra-prediction on the current block by using the intra-prediction mode and the reference sample, wherein when the intra-prediction mode of the neighbor block is unavailable, the intra-prediction mode of the neighbor block may be replaced with a planar mode.

公开(公告)号：US12170756B2

公开(公告)日：2024-12-17

申请号：US17277541

申请日：2019-09-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang Lim ,  Jung Won Kang ,  Ha Hyun Lee ,  Jin Ho Lee ,  Hui Yong Kim

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/51 ,  H04N19/96

Abstract: An image encoding/decoding method is disclosed. Present invention of the method of decoding an image comprises deriving motion information of a current block by using a candidate list, generating a prediction block of the current block by using the motion information of the current block and adding the motion information of the current block in the candidate list, wherein the candidate list is used for inter prediction of a block to be decoded after the current block.

公开(公告)号：US12166976B2

公开(公告)日：2024-12-10

申请号：US18345350

申请日：2023-06-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Ho Lee ,  Hui Yong Kim ,  Sung Chang Lim ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/11 ,  H04N19/107 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/91

Abstract: An image decoding method, according to the present invention, includes the steps of: deriving an MPM candidate mode from neighboring blocks adjacent to a target block to be decoded; generating an MPM list using the MPM candidate mode derived from the neighboring blocks; and deriving an intra prediction mode for the target block to be decoded using the generated MPM list. According to the present invention, image compression efficiency can be improved.

公开(公告)号：US12126826B2

公开(公告)日：2024-10-22

申请号：US17903494

申请日：2022-09-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/52

CPC classification number: H04N19/52

Abstract: A method for decoding an image according to the present invention comprises the steps of: decoding a residual block by quantizing and inverse transforming an entropy-decoded residual block; generating a prediction block via motion compensation; and decoding an image by adding the decoded residual block to the prediction block, wherein on the basis of the maximum number of motion vector candidates of the motion vector candidate list related to the prediction block, a motion vector candidate list is adjusted by adding a particular motion vector candidate or by discarding a portion from among the motion vector candidates, and in the prediction block generation step, a prediction motion vector of the prediction block is determined on the basis of the adjusted motion vector candidate list. Accordingly, the complexity of arithmetic operations is reduced during encoding/decoding of an image.

公开(公告)号：US20240333937A1

公开(公告)日：2024-10-03

申请号：US18734508

申请日：2024-06-05

Applicant: Electronics And Telecommunications Research Institute ,  Hanbat National University Industry-Academic Cooperation Foundation

Inventor： Ha Hyun LEE ,  Jung Won Kang ,  Sung Chang Lim ,  Jin Ho Lee ,  Hui Yong Kim ,  Hae Chul Choi ,  Dae Hyeok Gwon ,  Jae Ryun Choi

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

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: Disclosed herein is a method of decoding an image. The method includes determining a prediction mode of a current block as a merge mode with motion vector difference (MMVD), deriving a merge candidate list of the current block, deriving a motion vector predictor of the current block using the merge candidate list, deriving a motion vector difference of the current block, and deriving a motion vector of the current block using the motion vector predictor and the motion vector difference. Only some of candidates in the merge candidate list are used to derive the motion vector predictor.

公开(公告)号：US12101483B2

公开(公告)日：2024-09-24

申请号：US18087577

申请日：2022-12-22

Applicant: Electronics and Telecommunications Research Institute ,  CHIPS&MEDIA, INC

Inventor： Sung Chang Lim ,  Jung Won Kang ,  Ha Hyun Lee ,  Jin Ho Lee ,  Hui Yong Kim ,  Dae Yeon Kim ,  Wook Je Jeong ,  Hyun Gyu Kim

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/70

Abstract: An image decoding method is disclosed in the present specification. A method of decoding an image, the method may comprises determining whether to perform a context update for a first syntax element of a current block, updating, on the basis of the determination, a context for entropy decoding of the first syntax element and generating, on the basis of the updated context, a bin for the first syntax element, and wherein whether to perform the context update is determined on the basis of the number of pre-decoded predetermined syntax elements for the current block.

公开(公告)号：US12081774B2

公开(公告)日：2024-09-03

申请号：US17614935

申请日：2020-05-29

Applicant: Electronics and Telecommunications Research Institute ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY

Inventor： Jin Ho Lee ,  Jung Won Kang ,  Ha Hyun Lee ,  Sung Chang Lim ,  Hui Yong Kim ,  Jae Gon Kim ,  Do Hyeon Park ,  Ji Hoon Do ,  Yong Uk Yoon

IPC: H04N19/176 ,  H04N19/119 ,  H04N19/18 ,  H04N19/50

CPC classification number: H04N19/176 ,  H04N19/119 ,  H04N19/18 ,  H04N19/50

Abstract: Disclosed herein is a video decoding method including determining a zero-out width threshold and a zero-out height threshold for distinguishing between a transform coefficient coding region and a zero-out region of a current block according to a size of the current block, determining the transform coefficient coding region and the zero-out region of the current block according to the zero-out width threshold and the zero-out height threshold, acquiring transform coefficient information of the transform coefficient coding region from a bitstream and determining a level of a transform coefficient of the transform coefficient coding region according to the transform coefficient information, determining a level of a transform coefficient of the zero-out region as 0 without acquiring transform coefficient information, and reconstructing the current block by inversely transforming the transform coefficient of the current block.