Information recording/reproducing method and information recording/reproducing apparatus

An information recording and reproducing apparatus for an optical disk having a first recording layer on and from which information is recorded and reproduced with a laser beam that enters from a first surface of the optical disk and a second recording layer on and from which information is recorded and reproduced with the laser beam that has penetrated the first recording layer, said apparatus comprising:

• an optical head for recording and reproducing information by irradiating, with the laser beam, said first recording layer or said second recording layer;
• and
• control means for controlling the optical head, wherein
• said control means obtains a first reproduced signal level by recording and reproducing test data in and from a second test area on said second recording layer, records the test data in a first test area which is located on said first recording layer and which the laser beam penetrates when recording the test data in said second test area, obtains a second reproduced signal level by reproducing the test data recorded in said second test area with the laser beam that has penetrated the first test area in which the test data is recorded, and corrects and detects the reproduced signal on the second recording layer by using said first reproduced signal level and said second reproduced signal level, said reproduced signal having penetrated the area, in which the data is recorded, on the first recording layer.

An information recording and reproducing apparatus for an optical disk having a first recording layer on and from which information is recorded and reproduced with a laser beam that enters from a first surface of the optical disk and a second recording layer on and from which information is recorded and reproduced with the laser beam that has penetrated the first recording layer, said apparatus comprising:

• an optical head for recording and reproducing information by irradiating, with the laser beam, said first recording layer or said second recording layer;
• and
• control means for controlling the optical head,
• wherein said control means obtains a first reproduced signal level by recording and reproducing test data in and from a second test area on said second recording layer, records the test data in a first test area which is located on said first recording layer and which corresponds to said second test area, obtains a second reproduced signal level by reproducing the test data recorded in said second test area with the laser beam that has penetrated the first test area in which the test data is recorded, and corrects and detects the reproduced signal on the second recording layer by using said first reproduced signal level and said second reproduced signal level, said reproduced signal having penetrated the area, in which the data is recorded, on the first recording layer.

An information recording and reproducing method for an optical disk having a first recording layer on and from which information is recorded and reproduced with a laser beam that enters from a first surface of the optical disk and a second recording layer on and from which information is recorded and reproduced with the laser beam that has penetrated the first recording layer, said method comprising the steps of:

• obtaining a first reproduced signal level by recording and reproducing test data in and from a second test area on said second recording layer;
• recording the test data in a first test area which is located on said first recording layer and which the laser beam penetrates when recording the test data in said second test area;
• obtaining a second reproduced signal level by reproducing the test data recorded in said second test area with the laser beam that has penetrated the first test area in which the test data is recorded;
• and
• correcting and detecting the reproduced signal on the second recording layer by using said first reproduced signal level and said second reproduced signal level, said reproduced signal having penetrated the area, in which the data is recorded, on the first recording layer.

An information recording and reproducing method for an optical disk having a first recording layer on and from which information is recorded and reproduced with a laser beam that enters from a first surface of the optical disk and a second recording layer on and from which information is recorded and reproduced with the laser beam that has penetrated the first recording layer, said method comprising the steps of:

• obtaining a first reproduced signal level by recording and reproducing test data in and from a second test area on said second recording layer;
• recording the test data in a first test area which is located on said first recording layer and which corresponds to said second test area;
• obtaining a second reproduced signal level by reproducing the test data recorded in said second test area with the laser beam that has penetrated the first test area in which the test data is recorded;
• and
• correcting and detecting the reproduced signal on the second recording layer by using said first reproduced signal level and said second reproduced signal level, said reproduced signal having penetrated the area, in which the test data is recorded, on the first recording layer.