METHOD AND APPARATUS FOR IMAGE ENCODING AND DECODING USING LARGE TRANSFORMATION UNIT Russian patent published in 2015 - IPC H04N19/122 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method and an apparatus for encoding/decoding an image by transforming an image in a pixel domain into coefficients in a frequency domain. Disclosed is a method of encoding an image which comprises steps of: specifying a transformation unit, wherein the size of the transformation unit is greater than that of adjacent prediction units; transforming the transformation unit into a frequency domain and generating coefficients of frequency components; quantising the coefficients of frequency components and entropy encoding the quantised coefficients of frequency components.

EFFECT: setting a transformation unit to be larger than a prediction unit and performing discrete cosine transform (DCT) such that an image is efficiently compressed and encoded.

12 cl, 18 dwg