BIT PATTERN REVERSE-REPLACEMENT DEVICE, COMPUTER DEVICE, BIT PATTERN REPLACEMENT DEVICE, WRITER DEVICE, BIT PATTERN CONVERSION METHOD, AND PROGRAM

摘要

In the present invention, on the basis of a predetermined corresponding relationship, a reverse-replacement unit (11) generates first data (P1) by means of performing bit pattern reverse-replacement processing on second data (P2) read from non-volatile memory (10). Here, each of a plurality of first bit sequences contained in the first data (P1) corresponds to one of a plurality of second bit sequences contained in the second data (P2), and has the same bit length as the corresponding second bit sequence. Furthermore, the corresponding relationship of the first bit sequence and the second bit sequence is determined in a manner so that second bit sequences having bit patterns with a relatively low electrical power necessary during reading from non-volatile memory (10) are preferentially allocated to first bit sequences having bit patterns with a relatively high frequency of appearance among the plurality of first bit sequences.