METHOD AND APPARATUS FOR ENCODING VIDEO BY PERFORMING IN-LOOP FILTERING BASED ON TREE-STRUCTURED DATA UNIT, AND METHOD AND APPARATUS FOR DECODING VIDEO BY PERFORMING SAME

摘要

FIELD: information technology.SUBSTANCE: method of encoding video by performing in-loop filtering based on coding units includes splitting a picture into a maximum coding unit which is a data unit, the maximum coding unit having a maximum size; separately determining coding units for outputting encoding results according to a coded depth for deeper coding units that are hierarchically structured according to depths indicating a number of times the coding units are spatially split from the maximum coding unit; determining a filtering unit for performing in-loop filtering so as to minimise an error between the maximum coding unit and an original picture, based on the coding units corresponding to the tree structure of the maximum coding unit; and performing in-loop filtering based on the determined filtering unit.EFFECT: higher video compression speed.15 cl, 24 dwg, 2 tbl