Patent ID: 7248552

Claim:
A method for obtaining a recording pulse parameter by reading recording pulse parameters from a writable optical disc to which are prerecorded recording pulse parameters defining recording pulse position information defining either one of a leading mark-edge pulse parameter and a trailing mark-edge pulse parameter for each of plural possible mark length and space length combinations, said method comprising: performing a first test write to the optical disc using the recording pulse position information for one combination selected from all mark length and space length combinations in the recording pulse parameters; reproducing the first test write and detecting a first jitter from the reproduced signal; adding a first specific amount of change to the recording pulse position information to change either one of the leading mark-edge pulse parameter and the trailing mark-edge pulse Parameter for the one combination selected from all mark length and space length combinations, and performing a second test write to the optical disc using the changed recording pulse position information; reproducing the second test write and detecting a second jitter from the reproduced signal; and comparing the first jitter and second jitter, and selecting the recording pulse position information used for the test write with less jitter, wherein when one recording pulse position information is selected for one combination selected from all mark length and space length combinations, and another recording pulse position information is selected for another combination selected from all mark length and space length combinations, an intermediate recording pulse position information for a combination between said one and another combinations is obtained by interpolation from the one recording pulse position information and the another recording pulse position information.