| 摘要 |
A modulating device for converting data having a basic data length of m bits into variable length code (d, k; m, n) having a minimum run of d (d>0), a maximum run of k, and a basic codeword length of n bits, wherein the modulating device is characterized by having a basic conversion table and a substitution conversion table as a conversion table, and under a condition where the substitution conversion table is to be applied, control is performed to determine whether to perform substitution pattern conversion processing based on the substitution conversion table or to perform conversion processing based on the basic conversion table instead without performing the substitution pattern conversion processing, according to control information obtained from one of a data string and a variable length code string.
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