Information Recording Medium, Information Recording Device and Method, Information Recording/Reproducing Device and Method, and Computer Program

An information recording apparatus comprising:

• a recording device for recording record information onto an information recording medium by irradiating the information recording medium with laser light with a recording power according to a set value;
• a calculating device for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value;
• a measuring device for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value, at least in each information amount in which the reproduction quality can be measured;
• and
• an adjusting device for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by said measuring device is different from the target reproduction quality, and for adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value.

An information recording method comprising:

• a recording process of recording record information onto an information recording medium by irradiating the information recording medium with laser light with a recording power according to a set value;
• a calculating process of preparing correlation information which represents a correlation between the set value and reproduction quality, and of obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value;
• a measuring process of measuring the reproduction quality, by reproducing the record information recorded by using the reference set value, at least in each information amount in which the reproduction quality can be measured;
• and
• an adjusting process of obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured in said measuring process is different from the target reproduction quality, and of adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value.

An information recording/reproducing apparatus comprising:

• an information recording apparatus comprising:
• a recording device for recording record information onto an information recording medium by irradiating the information recording medium with laser light with a recording power according to a set value;
• a calculating device for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value;
• a measuring device for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value, at least in each information amount in which the reproduction quality can be measured;
• and
• an adjusting device for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by said measuring device is different from the target reproduction quality, and for adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value;
• and
• a reproducing device for reproducing the recorded information from said information recording medium.

An information recording/reproducing method comprising:

• an information recording method comprising:
• a recording process of recording record information onto an information recording medium by irradiating the information recording medium with laser light with a recording power according to a set value;
• a calculating process of preparing correlation information which represents a correlation between the set value and reproduction quality, and of obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value;
• a measuring process of measuring the reproduction quality, by reproducing the record information recorded by using the reference set value, at least in each information amount in which the reproduction quality can be measured;
• and
• an adjusting process of obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured in said measuring process is different from the target reproduction quality, and of adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value;
• and
• a reproducing process of reproducing the recorded information from said information recording medium.

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 portion of a recording device, a calculating detecting device, a measuring device and an adjusting device,

• said information recording apparatus comprising:
• said recording device for recording record information onto an information recording medium by irradiating the information recording medium with laser light with a recording power according to a set value;
• said calculating device for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value;
• said measuring device for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value, at least in each information amount in which the reproduction quality can be measured;
• and
• said adjusting device for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by said measuring device is different from the target reproduction quality, and for adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value.

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/reproducing apparatus, said computer program making the computer function as at least one portion of a recording device, a calculating detecting device, a measuring device, an adjusting device and a reproducing device,

• said information recording/reproducing apparatus comprising:
• an information recording apparatus comprising:
• said recording device for recording record information onto an information recording medium by irradiating the information recording medium with laser light with a recording power according to a set value;
• said calculating device for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value;
• said measuring device for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value, at least in each information amount in which the reproduction quality can be measured;
• and
• said adjusting device for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by said measuring device is different from the target reproduction quality, and for adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value;
• and
• said reproducing device for reproducing the recorded information from said information recording medium.