METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE AND METHOD AND APPARATUS FOR DECODING IMAGE USING ADAPTIVE COEFFICIENT SCAN ORDER

摘要

Provided are a method and apparatus for encoding an image and a method and apparatus for decoding an image using an adaptive coefficient scan order. The method for encoding the image includes: projecting coefficients of a current block to a reference axis, from among a horizontal axis and a vertical axis, along a first straight line perpendicular to a second straight line with a predetermined angle a from the reference axis; scanning the coefficients of the current block in an arrangement order of the projected coefficients projected to the reference axis; and entropy-encoding information about the predetermined angle a and the scanned coefficients.