| 摘要 |
PURPOSE:To increase the number of combinations of codes by a simple method, by specify the operation of code conversion when the input code belonging to one code set is converted to another output code belonging to the set. CONSTITUTION:Respective one generating elements f1, f2... of plural cyclic substitution groups having no common element except constant elements out of sets of cyclic substitution groups obtained by substituting respective elements of set S1 of n-number codes are stored in memory means, and plural sets M1, M2... where code elements m1, m2... correspond to integers respectively are generated by a generating means. Then, element X of set S1 and elements Y1, Y2... of sets M1, M2... are received to output code Z belonging to set S1 from the operation means. In this operation means, the operation of the expression shown in the figure is executed, thus increasing the number of combinations of codes by the simple method. |
