| 摘要 |
PROBLEM TO BE SOLVED: To expand compressed data into original data at high speed. SOLUTION: An appearance frequency calculation section 122 calculates the appearance frequency of a symbol value with data compressed as a symbol encoded for the unit of two bytes and an encoding section 126 performs encoding processing for encoding, respectively, a symbol value of a high-order appearance frequency into a one-byte code, a symbol value of a next high-order appearance frequency into a two-byte code, remaining symbol values into three-byte code, and two continuous symbol values 0x0000 into a one-byte specific value 0xFF. The present invention may be applicable to the case of compressing and expanding a computer executable program, for example. COPYRIGHT: (C)2008,JPO&INPIT
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