ENCODING METHOD, ENCODING DEVICE, DECODING METHOD, DECODING DEVICE, AND PROGRAM THEREOF

摘要

A sub-block generation circuit (52) divides a coefficient of 8 x 8 orthogonal conversion into sub-block data. A 2-dimensional reversible encoding circuit (54) encodes data on the number-of-non-zero coefficients of the sub block far from the DC component Total Coeff by selecting conversion table data for assigning an encoding code of a short bit length to the data on the number-of-non-zero coefficients indicating 0.