IMAGE DECODING METHOD AND DEVICE THEREFOR, AND IMAGE ENCODING METHOD AND DEVICE THEREFOR

摘要

Disclosed is a method for decoding image data, comprising: receiving a bit stream including encoded image information; decoding an image on the basis of the encoded image information; acquiring, from data generated by the decoding, luma data allocated to a luma channel configured by multiple channels and chroma data allocated to a chroma channel configured by a single channel; merging the acquired luma data of the luma channel into luma data having a single component; dividing the acquired chroma data of the chroma channel into chroma data having multiple components; and reconstructing the image on the basis of the luma data having the single component generated by the merging and the chroma data having the divided multiple components.