Patent ID: 7158059

Claim:
A recordable medium to be recorded by a coding method, the coding method comprising: generating a first information sequence by inserting a first DC control bit into an input information sequence at predetermined intervals and generating a second information sequence by inserting a second DC control bit different from the first DC control bit into the input information sequence at the predetermined intervals; generating a first provisional code sequence by making a code conversion of the first information sequence generated in the information sequence generating step at a conversion ratio of an information word length m to a code word length n; generating a second provisional code sequence by making a code conversion of the second information sequence generated in the information sequence generating step at the conversion ratio of the information word length m to the code word length n; and selecting either the first provisional code sequence or the second provisional code sequence, wherein the first and second code converting steps use a coding rule represented by a finite-state code conversion table in which code words are assigned to information words so that a two's complement of a sum of coding bits included in the first provisional code sequence is always different from a two's complement of a sum of coding bits included in the second provisional code sequence when a first code state of the first provisional code sequence, encoded starting with a predetermined original state, is identical to a second code state of the second provisional code sequence, encoded starting with the predetermined original state.