| 摘要 |
A data modulating method and apparatus, and a recording method and apparatus are provided to perform stable recording and/or reproduction of data by replacing a part of channel sequence with a subsidiary sequence when the generated channel sequence violates the RMTR limit. A data modulating method comprises a step of producing a channel sequence by using a first table including a code word corresponding to input data(10) and information designating the next state, and a step of replacing a part of channel sequence with a subsidiary sequence when the generated channel sequence violates the RMTR(Repeated Minimum Transition Run-length) limit, where the subsidiary sequence cannot be generated from the first table.
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