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1. WO2020222617 - METHOD FOR ENCODING/DECODING VIDEO SIGNAL AND DEVICE THEREFOR

Publication Number WO/2020/222617
Publication Date 05.11.2020
International Application No. PCT/KR2020/005902
International Filing Date 04.05.2020
IPC
H04N 19/119 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
119Adaptive subdivision aspects e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
H04N 19/105 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
103Selection of coding mode or of prediction mode
105Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
H04N 19/132 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
132Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
H04N 19/60 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
H04N 19/186 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
186the unit being a colour or a chrominance component
H04N 19/11 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
103Selection of coding mode or of prediction mode
11among a plurality of spatial predictive coding modes
Applicants
  • 주식회사 엑스리스 XRIS CORPORATION [KR]/[KR]
Inventors
  • 이배근 LEE, Bae Keun
Agents
  • 최윤서 CHOE, Yun Seo
Priority Data
10-2019-005123402.05.2019KR
10-2019-005189002.05.2019KR
10-2019-006901711.06.2019KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) METHOD FOR ENCODING/DECODING VIDEO SIGNAL AND DEVICE THEREFOR
(FR) PROCÉDÉ DE CODAGE/DÉCODAGE DE SIGNAL VIDÉO ET DISPOSITIF ASSOCIÉ
(KO) 영상 신호 부호화/복호화 방법 및 이를 위한 장치
Abstract
(EN)
A video decoding method, according to the present invention, comprises the steps of: deriving an L0 motion vector and an L1 motion vector of a current block; deriving an L0 prediction sample and an L1 prediction sample for a first position inside the current block on the basis of the L0 motion vector and the L1 motion vector; determining whether to apply a bidirectional optical flow to the current block; deriving a refined motion vector for a subblock which comprises the first position, when it is determined to apply the bidirectional optical flow; deriving a refined prediction sample for the first position on the basis of the refined motion vector; and obtaining a prediction sample for the first position by using the L0 prediction sample, the L1 prediction sample, and the refined prediction sample.
(FR)
Procédé de décodage vidéo comprenant les étapes consistant à : déduire un vecteur de mouvement L0 et un vecteur de mouvement L1 d'un bloc courant ; déduire un échantillon de prédiction L0 et un échantillon de prédiction L1 pour une première position à l'intérieur du bloc courant sur la base du vecteur de mouvement L0 et du vecteur de mouvement L1 ; déterminer s'il faut appliquer un flux optique bidirectionnel au bloc courant ; déduire un vecteur de mouvement affiné pour un sous-bloc qui comprend la première position, lorsqu'il faut appliquer le flux optique bidirectionnel ; déduire un échantillon de prédiction affiné pour la première position sur la base du vecteur de mouvement affiné ; et obtenir un échantillon de prédiction pour la première position à l'aide de l'échantillon de prédiction L0, de l'échantillon de prédiction L1 et de l'échantillon de prédiction affiné.
(KO)
본 발명에 따른 영상 복호화 방법은, 현재 블록의 L0 움직임 벡터 및 L1 움직임 벡터를 유도하는 단계, 상기 L0 움직임 벡터 및 상기 L1 움직임 벡터를 기초로, 상기 현재 블록 내 제1 위치에 대한 L0 예측 샘플 및 L1 예측 샘플을 유도하는 단계, 상기 현재 블록에 대해 양방향 옵티컬 플로우를 적용할 것인지 여부를 결정하는 단계, 상기 양방향 옵티컬 플로우를 적용하는 것으로 결정된 경우, 상기 제1 위치를 포함하는 서브 블록에 대한 리파인 움직임 벡터를 유도하는 단계, 상기 리파인 움직임 벡터를 기초로, 상기 제1 위치에 대한 리파인 예측 샘플을 유도하는 단계, 및 상기 L0 예측 샘플, 상기 L1 예측 샘플 및 상기 리파인 예측 샘플을 이용하여, 상기 제1 위치에 대한 예측 샘플을 획득하는 단계를 포함한다.
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