Patent ID: 7236438

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 leading mark-edge pulse parameter and trailing mark-edge pulse parameter for each of plural 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 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 uniformly to the recording pulse position information to change either one of leading mark-edge pulse parameter and trailing mark-edge pulse parameter for all mark length and space length combinations in the recording pulse parameters, and performing a second test write to the optical disc using the uniformly 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.