Encoding method and apparatus for compressing a data structure having two or more dimensions, decoding method, and storage medium

摘要

On the basis of a bit sequence of a given command code, it is determined to which of repetition, copying and raw-data substitution the bit sequence applies. Based upon the result of the determination made, the data lengths of each of repetition, copying and raw data are calculated. In accordance with the calculations, at least two results from among results of repetition, copying and raw-data substitution of the encoding are combined and encoded as a command of one byte.