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1. (WO2018128223) INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

Pub. No.:    WO/2018/128223    International Application No.:    PCT/KR2017/004371
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Wed Apr 26 01:59:59 CEST 2017
IPC: H04N 19/109
Applicants: LG ELECTRONICS INC.
엘지전자 주식회사
Inventors: PARK, Naeri
박내리
NAM, Junghak
남정학
LIM, Jaehyun
임재현
KIM, Seunghwan
김승환
SEO, Jungdong
서정동
LEE, Jaeho
이재호
JANG, Hyeongmoon
장형문
Title: INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM
Abstract:
An image decoding method carried out by a decoding apparatus according to the present invention comprises the steps of: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block on the basis of a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated on the basis of the scaled movement vector and location of the current block; and deriving a movement vector of the current block on the basis of the updated movement vector.