Apparatus and method of generating optimum recording power for optical recording/reproducing apparatus

A method of generating an optimum recording power for an optical recording medium in which signal tracks composed of a plurality of sectors are provided, and position information on the signal track where data can be recorded and control information are provided by preformatted form, the method comprising the steps of:

• synchronizing first data unit of a test area on the optical recording medium to perform an optimum power calibration (OPC);
• generating a recording pattern for performing the OPC, wherein a longest time period (T) (corresponding to a length for one clock pulse) and a shortest T are generated as the recording pattern;
• recording the recording pattern in a specified first data unit as changing a recording power on the basis of a reference recording power recorded on the optical recording medium, wherein the longest T and the shortest T are recorded with the same recording power for at least two parts in the corresponding first data unit;
• reproducing the data recorded in the specified first data unit with the respective changed recording power, and determining the optimum recording power from the characteristic of a reproduced signal;
• and
• recording user data in a predetermined user data area of the optical recording medium with the determined optimum recording power.

A method of generating an optimum recording power for an optical recording medium in which signal tracks are provided, and position information on the signal track where the data can be recorded is provided by a pre-formatted form, the method comprising the steps of:

• generating a recording pattern for performing the OPC, wherein a longest time period (T) is generated as the recording pattern;
• recording the recording pattern in a first data unit of the test area as changing a recording power on the basis of a reference recording power recorded on the optical recording medium, wherein the longest T is recorded with the same recording power for at least two parts of the first data unit;
• reproducing the data recorded in the first data unit with the respective chanaed recording power, and determining the optimum recording power from the characteristic of a reproduced signal;
• and
• recording user data in a predetermined user data area of the optical recording medium with the determined optimum recording power.

A method of generating an optimum recording power for an optical recording medium in which signal tracks are provided, and position information on the signal track where the data can be recorded is provided by a pre-formatted form, the method comprising the steps of:

• generating a recording pattern for performing the OPC, wherein a long T having a saturation characteristic and a short T having no saturation characteristic are generated as the recording pattern;
• recording the recording pattern in the test area as changing a recording power on the basis of a reference recording power recorded on the optical recording medium, wherein the recording can be performed by a first data unit, and the long T and the short T are recorded with the same recording power for at least two parts of the first data unit;
• reproducing the data recorded in the test area with the respective changed recording power, and determining the optimum recording power from the characteristic of a reproduced signal;
• and
• recording user data in a predetermined user data area of the optical recording medium with the determined optimum recording power.

A method of generating an optimum recording power for an optical recording medium in which signal tracks are provided, and position information on the signal track where the data can be recorded is provided by a pre-formatted form, the method comprising the steps of:

• generating a recording pattern data for performing the OPC, wherein a single recording pattern of nT is generated as the recording pattern data;
• recording the recording pattern data in a first data unit of the test area as changing a recording power on the basis of a reference recording power recorded on the optical recording medium, wherein the nT is recorded with the same recording power for at least two parts of the first data unit;
• reproducing the data recorded in the first data unit with the respective changed recording power, and determining the optimum recording power from the characteristic of a reproduced signal;
• and
• recording user data in a predetermined user data area of the optical recording medium with the determined optimum recording power.

A method of generating an optimum recording power for an optical recording medium, the method comprising the steps of:

• searching a test area on the optical recording medium to perform an optimum power calibration (OPC);
• generating a recording pattern data for performing the OPC;
• recording the recording pattern data in a first unit of the test area as changing a recording power on the basis of a reference recording power recorded on the optical recording medium, wherein the recording can be performed in a part of the first unit;
• reproducing the data recorded in the first unit with the respective changed recording power, and determining the optimum recording cower from the characteristic of a reproduced signal;
• and
• recording user data in a predetermined user data area of the optical recording medium with the determined optimum recording power;
• wherein the OPC is performed in a direction from an inner periphery to an outer periphery of the test area, and the recording at this time is performed from a low power to a high power.

A method of generating an optimum recording power for an optical recording medium, the method comprising the steps of:

• searching a test area on the optical recording medium to perform an optimum power calibration (OPC);
• generating a recording pattern data for performing the OPC;
• recording the recording pattern data in a first unit of the test area as changing a recording power on the basis of a reference recording power recorded on the optical recording medium, wherein the recording can be performed in a part of the first unit;
• reproducing the data recorded in the first unit with the respective changed recording power, and determining the optimum recording power from the characteristic of a reproduced signal;
• and
• recording user data in a predetermined user data area of the optical recording medium with the determined optimum recording power;
• wherein the OPC is performed in a direction from an outer periphery to an inner periphery of the test area, and the recording at this time is performed from a high power to a low power.

An apparatus for generating an optimum recording power for an optical recording medium in which land and groove signal tracks composed of a plurality of sectors are provided, data can be recorded in one of the signal tracks, and position information on the signal track where the data can be recorded is pre-pitted by a high frequency signal and recorded in the other signal track, and control information is wobbled in the signal tracks, the apparatus comprising:

• a control section for detecting a start position of the respective sector of a test area by counting a PLL-locked wobble signal, and controlling generation of a recording pattern and a recording power for performing an optimum power calibration (OPC);
• an encoding section for detecting and PLL-locking the wobble signal formed on the track using an electric signal of a reflected light quantity outputted from the optical recording medium, detecting and decoding a pre-pit signal, and generating the recording pattern for performing the OPC;
• a laser power control section for dividing the recording power into several levels on the basis of a reference recording power recorded on the optical recording medium under the control of the control section and outputting the recording power levels;
• a recording section for sequentially recording the recording pattern in a specified sector of the unrecorded test area with the several recording power levels changed by and outputted from the laser power control section;
• and
• an optimum recording power determining section for reproducing the data recorded in the specified sector for the respective recording power level, and determining an optimum recording power from the characteristic of a reproduced signal.