METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE USING LARGE TRANSFORM UNIT

摘要

Disclosed are an image encoding method and apparatus for encoding an image by grouping a plurality of adjacent prediction units into a transformation unit and an image decoding method and apparatus for decoding an image encoded by using the image encoding method and apparatus. According to an embodiment of the present invention, an image decoding apparatus includes an entropy decoder for entropy-decoding frequency component coefficients that are generated by being transformed to a frequency domain; an inverse-quantization unit for inverse-quantizing the frequency component coefficients; and an inverse-transformer for inverse-transforming the frequency component coefficients into a pixel domain, and reconstructing a plurality of adjacent prediction units comprised in the transformation unit.