Image encoding and decoding method

摘要

The size of an orthogonal transform block is selected. If the selected block is larger than the minimum size, the coefficient string in the block is divided into strings, each with a length equal to that of the string in the block of minimum size. Entropy coding is then performed adapted to the coefficient string in the block of the minimum size. Independent claims are also included for the following: (1) an image encoding apparatus; (2) an image decoding apparatus; (3) an image encoding program; and (4) an image decoding program.