| 摘要 |
Repetitive portions are sequentially detected in compression target data, and it is determined whether the approximately corresponding position of each repetitive portion is under a word-repetition condition, which is a position corresponding to a multiple of a length of an instruction word, or whether the position is under a byte-repetition condition. When it is under a word-repetition condition, a word-repetition code including at least a value obtained by dividing an approximately corresponding position by an instruction word length and a value specifying a length of a corresponding portion is generated and output as compressed data. When it is a byte-repetition condition, a byte-repetition code including at least a value specifying an approximately corresponding position and a value specifying a length of a corresponding portion is generated and output as compressed data. |
