Information recording apparatus and method, and computer program for recording control

An information recording method in an information recording apparatus comprising a writing device capable of writing record information into a first recording layer and a second recording layer, onto an information recording medium comprising at least:

• the first recording layer in which a first recording area can be formed, and the second recording layer which has a relative discrepancy with the first recording layer in a radial direction and in which a second recording area can be formed,
• said information recording method comprising:
• an obtaining process of obtaining offset information which indicates the relative discrepancy;
• a calculating process of calculating an address which indicates a second border point of the second recording layer facing a first border point of the first recording layer, on the basis of the obtained offset information;
• and
• a controlling process of controlling said writing device to write the record information (i) to form the first recording area, with the first border point as a recording end position or a recording start position, and (ii) to form the second recording area, with the second border point which is indicated by the calculated address as a recording end position or a recording start position.

A computer program product in a computer-readable medium for tangibly embodying a program of instructions executable by a computer provided for an information recording apparatus, said computer program product making the computer function as at least one of a writing device, a obtaining device, a calculating device, and a controlling device,

• said information recording apparatus for recording record information onto an information recording medium comprising at least:
• a first recording layer in which a first recording area can be formed, and a second recording layer which has a relative discrepancy with the first recording layer in a radial direction and in which a second recording area can be formed,
• said information recording apparatus comprising:
• said writing device capable of writing the record information into the first recording layer and the second recording layer;
• said obtaining device for obtaining offset information which indicates the relative discrepancy;
• said calculating device for calculating an address which indicates a second border point of the second recording layer facing a first border point of the first recording layer, on the basis of the obtained offset information;
• and
• said controlling device for controlling said writing device to write the record information (i) to form the first recording area, with the first border point as a recording end position or a recording start position, and (ii) to form the second recording area, with the second border point which is indicated by the calculated address as a recording end position or a recording start position.

An information recording apparatus for recording buffer data onto an information recording medium comprising at least:

• a first recording layer in which a first shifted middle area can be formed, and a second recording layer which has a relative discrepancy with the first recording layer in a radial direction and in which a second shifted middle area can be formed,
• said information recording apparatus comprising:
• a writing device capable of writing the buffer data into the first recording layer and the second recording layer;
• an obtaining device for obtaining offset information which indicates the relative discrepancy;
• a calculating device for calculating an address which indicates a second border point of the second shifted middle area facing a first border point of the first shifted middle area, on the basis of the obtained offset information;
• and
• a controlling device for controlling said writing device to write the buffer data (i) to form the first shifted middle area, with the first border point as an outer circumferential end, and (ii) to form the second shifted middle area, with the second border point which is indicated by the calculated address as an outer circumferential end.

An information recording method in an information recording apparatus comprising a writing device capable of writing buffer data into a first recording layer and a second recording layer, onto an information recording medium comprising at least:

• the first recording layer in which a first shifted middle area can be formed, and the second recording layer which has a relative discrepancy with the first recording layer in a radial direction and in which a second shifted middle area can be formed,
• said information recording method comprising:
• an obtaining process of obtaining offset information which indicates the relative discrepancy;
• a calculating process of calculating an address which indicates a second border point of the second shifted middle area facing a first border point of the first shifted middle area, on the basis of the obtained offset information;
• and
• a controlling process of controlling said writing device to write the buffer data (i) to form the first shifted middle area, with the first border point as an outer circumferential end, and (ii) to form the second shifted middle area, with the second border point which is indicated by the calculated address as an outer circumferential end.

An information recording apparatus for recording an OPC (Optimum Power Control) pattern onto an information recording medium comprising at least:

• a first recording layer in which a first flexible ODTA (Outer Disc Testing Area) can be formed, and a second recording layer which has a relative discrepancy with the first recording layer in a radial direction and in which a second flexible ODTA can be formed,
• said information recording apparatus comprising:
• a writing device capable of writing the OPC pattern into the first recording layer and the second recording layer;
• an obtaining device for obtaining offset information which indicates the relative discrepancy;
• a calculating device for calculating an address which indicates a second border point of the second flexible ODTA facing a first border point of the first flexible ODTA, on the basis of the obtained offset information;
• and
• a controlling device for controlling said writing device to write the OPC pattern (i) to form the first flexible ODTA, with the first border point as an outer circumferential end, and (ii) to form the second flexible ODTA, with the second border point which is indicated by the calculated address as an outer circumferential end.

An information recording method in an information recording apparatus comprising a writing device capable of writing an OPC (Optimum Power Control) pattern into a first recording layer and a second recording layer, onto an information recording medium comprising at least:

• the first recording layer in which a first flexible ODTA (Outer Disc Testing Area) can be formed, and the second recording layer which has a relative discrepancy with the first recording layer in a radial direction and in which a second flexible ODTA can be formed,
• said information recording method comprising:
• an obtaining process of obtaining offset information which indicates the relative discrepancy;
• a calculating process of calculating an address which indicates a second border point of the second flexible ODTA facing a first border point of the first flexible ODTA, on the basis of the obtained offset information;
• and
• a controlling process of controlling said writing device to write the OPC pattern (i) to form the first flexible ODTA, with the first border point as an outer circumferential end, and (ii) to form the second flexible ODTA, with the second border point which is indicated by the calculated address as an outer circumferential end.