| 摘要 |
Main encoding tables are normally used in modulating "p"-bit input data words into "q"-bit output code words. First and second substitution encoding tables are periodically used instead of the main encoding tables in the modulation. Regarding the modulation using the first and second substitution encoding tables, "r" connection bits are added to every resultant "q"-bit output code word to get a "q+r"-bit output code word. An output-code-word sequence is generated by connecting "q"-bit output code words produced by the modulation using the main encoding tables, and "q+r"-bit output code words caused by the modulation using the first and second substitution encoding tables. The main encoding tables are designed to enable DSV control to be executed when a current input data word is equal to one of prescribed input data words. The first and second substitution encoding tables are designed to enable DSV control to be executed.
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