Data modulation apparatus, data modulation method, data modulation program, and recording medium

A data modulation method of a data modulation apparatus that includes insertion means, conversion means, setting means, and determination means, the data modulation method comprising the steps of:

• inserting information bits into data at a predetermined interval by using the insertion means;
• converting the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule by using the conversion means;
• setting a control section that is used for calculating a value of the information bit by using the setting means;
• and
• determining the value of the information bit inserted into the control section that is different from a calculation target by calculating the code of the control section by using the determination means.

A program embodied on a non-transitory computer readable storage medium that causes a computer to serve as insertion means, conversion means, setting means, and determination means,

• wherein the insertion means inserts information bits into data at a predetermined interval,
• wherein the conversion means converts the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule,
• wherein the setting means sets a control section that is used for calculating a value of the information bit, and
• wherein determination means determines the value of the information bit inserted into the control section that is different from a calculation target by calculating the code of the control section.

A data modulation apparatus comprising:

• insertion means for inserting information bits into data at a predetermined interval;
• conversion means for converting the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule;
• setting means for setting a control section that is used for calculating a value of the information bit;
• and
• determination means for determining the value of the information bit inserted into the control section by calculating the code of the control section,
• wherein the insertion means inserts identification information relating to a position of a block of the control section into a synchronization signal.

A data modulation method of a data modulation apparatus comprising:

• insertion means for inserting information bits into data at a predetermined interval;
• conversion means for converting the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule;
• setting means for setting a control section that is used for calculating a value of the information bit;
• and
• determination means for determining the value of the information bit inserted into the control section by calculating the code of the control section,
• wherein the insertion means inserts identification information relating to a position of a block of the control section into a synchronization signal.

A program embodied on a non-transitory computer readable storage medium that causes a computer to serve as:

• insertion means for inserting information bits into data at a predetermined interval;
• conversion means for converting the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule;
• setting means for setting a control section that is used for calculating a value of the information bit;
• and
• determination means for determining the value of the information bit inserted into the control section by calculating the code of the control section,
• wherein the insertion means inserts identification information relating to a position of a block of the control section into a synchronization signal.

A data modulation apparatus comprising:

• an insertion unit configured to insert information bits into data at a predetermined interval;
• a conversion unit configured to convert the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule;
• a setting unit configured to set a control section that is used for calculating a value of the information bit;
• and
• a determination unit configured to determine the value of the information bit inserted into the control section that is different from a calculation target by calculating the code of the control section.

A data modulation apparatus comprising:

• an insertion unit configured to insert information bits into data at a predetermined interval;
• a conversion unit configured to convert the data into which the information bits are inserted into an RLL code based on a modulation table that has a variable-length conversion rule;
• a setting unit configured to set a control section that is used for calculating a value of the information bit;
• and
• a determination unit configured to determine the value of the information bit inserted into the control section by calculating the code of the control section,
• wherein the insertion unit inserts identification information relating to a position of a block of the control section into a synchronization signal.