METHOD AND DEVICE FOR ENCODING/DECODING ACCORDING TO METHOD FOR SCANNING TRANSFORMATION COEFFICIENT SUBGROUP

摘要

A method for decoding an image according to an embodiment of the present invention is an image decoding method comprising: a step of determining a coding unit of a decoding target block; a step of determining a prediction mode corresponding to the coding unit; a step of performing prediction processing corresponding to the prediction mode; a step of determining a scanning order corresponding to a transformation coefficient group, according to the prediction processing; a step of determining a transformation coefficient based on the scanning order corresponding to the transformation coefficient group; a step of performing inverse transformation processing using the determined transformation coefficient; a step of performing inverse quantization processing corresponding to the inverse transformation processing; and a step of processing in-loop filtering of the target block which has been subjected to the inverse quantization processing.