Patent ID: 9141455
Filing Date: 2015-09-22
Classification: G06F,H03M

Abstract:
1. A data converting method executed by a computer, the data converting method comprising: counting for each bit pattern that appears in a group of data segments and is among a group of bit patterns that a bit string of a specific number of bits assume, the number of data segments in the group of data segments, having the bit pattern, the group of data segments being created by segmenting write_data by the specific number of bits, the write_data being written to a storage medium having a property that among two types of bit values stored in the storage medium, a first value has a bit error occurrence rate that is higher than that of a second value; correlating a bit pattern that is selected as a conversion source pattern, from the group of bit patterns in descending order of count results obtained at the counting, with a bit pattern that is selected as a conversion target pattern, from the group of bit patterns in descending order of quantities of the second value included in the bit patterns, respectively; and converting for each conversion source bit pattern, data segments included in the group of data segments and having the conversion source bit pattern, into converted data segments having the conversion target bit pattern correlated with the conversion source bit pattern.