Recording apparatus, recording method, reproduction apparatus, reproduction method, recording medium, encoding apparatus, and decoding apparatus

A recording method comprising:

• encoding user data into a multilevel edge code generated through state transition of a code generation model
• which includes a state representing a number of times that zero is consecutive corresponding to a number of ways of the number of times that zero is consecutive that an edge of zero is consecutive among edges representing a change amount from an immediately preceding value of a multilevel code of an ML value which is equal to or greater than 3, and
• which generates the multilevel edge code expressing the multilevel code with the edge through state transition of transitioning to a state representing the number of times that zero is consecutive including 0 in a case where 0 is output and transitioning to a state representing that the number of times that zero is consecutive is 0 times in a case where one of 1 to ML−1 is output;
• and
• recording the multilevel code whose value changes in accordance with the multilevel edge code in a recording medium.

A reproduction apparatus comprising:

• a reproducing unit configured to reproduce from a recording medium, a multilevel code whose value changes in accordance with a multilevel edge code generated through state transition of a code generation model
• which includes a state representing a number of times that zero is consecutive corresponding to a number of ways of a number of times that zero is consecutive, which is a number of times that an edge of 0 is consecutive among edges representing a change amount from an immediately preceding value of the multilevel code of an ML value which is equal to or greater than 3, and
• which generates the multilevel edge code expressing the multilevel code with the edge through state transition of transitioning to a state representing the number of times that zero is consecutive including 0 in a case where 0 is output and transitioning to a state representing that the number of times that zero is consecutive is 0 times in a case where one of 1 to ML−1 is output;
• and
• a decoding unit configured to decode the multilevel code.

A reproduction method comprising:

• reproducing from a recording medium, a multilevel code whose value changes in accordance with a multilevel edge code generated through state transition of a code generation model
• which includes a state representing a number of times that zero is consecutive corresponding to a number of ways of a number of times that zero is consecutive, which is a number of times that an edge of 0 is consecutive among edges representing a change amount from an immediately preceding value of the multilevel code of an ML value which is equal to or greater than 3, and
• which generates the multilevel edge code which expresses the multilevel code with the edge through state transition of transitioning to a state representing the number of times that zero is consecutive including 0 in a case where 0 is output and transitioning to a state representing that the number of times that zero is consecutive is 0 times in a case where one of 1 to ML−1 is output;
• and
• decoding the multilevel code.