FIELD: information technology.
SUBSTANCE: image decoding method comprising determining coding units having a hierarchical structure for decoding an image, at least one prediction unit for predicting each of the coding units, and at least one transformation unit for inversely transforming each of the coding units, by using information about a division shape of a coding unit, at least one prediction unit and at least one transformation unit; obtaining transformation coefficients by parsing from the bitstream and reconstructing encoded data of the at least one prediction unit by performing entropy decoding, inverse quantisation, and inverse transformation on the transformation coefficients; and performing intra prediction or inter prediction on the reconstructed encoded data and reconstructing the encoded video, wherein the coding units are split hierarchically according to a depth of the coding unit, and wherein the at least one transformation unit comprises a transformation unit having a larger size than the size of the at least one prediction unit.
EFFECT: high efficiency of decoding images.
4 cl, 18 dwg
