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1. (WO2018105757) METHOD AND DEVICE FOR DECODING IMAGE IN IMAGE CODING SYSTEM

Pub. No.:    WO/2018/105757    International Application No.:    PCT/KR2016/014167
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Tue Dec 06 00:59:59 CET 2016
IPC: H04N 19/109
H04N 19/513
H04N 19/139
H04N 19/105
H04N 19/172
H04N 19/176
H04N 19/119
H04N 19/13
H04N 19/91
H04N 19/44
Applicants: LG ELECTRONICS INC.
엘지전자 주식회사
Inventors: SEO, Jungdong
서정동
LIM, Jaehyun
임재현
Title: METHOD AND DEVICE FOR DECODING IMAGE IN IMAGE CODING SYSTEM
Abstract:
An image decoding method performed by a decoding device according to the present invention comprises the steps of: acquiring information on inter prediction of a target block through a bit stream; deriving motion information of the target block on the basis of the information on inter prediction; deriving a prediction sample by performing inter prediction for the target block on the basis of the motion information; generating a reconstruction block on the basis of the prediction sample; deriving modified motion information of the target block on the basis of the reconstruction block; and updating the motion information of the target block on the basis of the modified motion information. According to the present invention, modified motion information of the target block can be calculated, and the motion information of the target block can be updated on the basis of the modified motion information, so that the overall coding efficiency can be improved.