Coding method, coding apparatus, decoding method, and decoding apparatus

摘要

Disclosed herein is a coding method including the step of: coding an information sequence in such a manner that upon performing error correction coding after carrying out RLL coding of the information sequence, the maximum number of consecutive 1-bits or 0-bits is α−&bgr; or less in an RLL code word over a range from bit p−α to bit p+α−1 of the RLL code word and that a &bgr;-bit error correcting code parity sequence is inserted between bit p−1 and bit p of the RLL code word, where α is a number larger than 1 representing the maximum number of consecutive 0-bits or 1-bits in an n-bit RLL code word and where p is a natural number.