Optical disk recording control method and apparatus for recording user data based on test signal

An optical disk recording control method in which test write data are written as test writing in an optical disk so that user information is recorded in said optical disk on the basis of a result of the test writing, said method comprising the steps of:

• a) judging identification information possessed by said optical disk for identifying either one of first and second modulation systems of said user information;
• b) generating a test write pattern constituted by densest and sparsest patterns corresponding to a code configuration of the identified one of said first and second modulation systems;
• c) generating a test write pulse string from said test write pattern and recording said test write pulse string in a predetermined zone of said optical disk;
• d) obtaining optimum recording power for said predetermined zone on the basis of a densest pattern waveform and a sparsest pattern waveform so that the zero level of the densest pattern waveform coincides with the zero level of the sparsest pattern waveform in said test write pulse string recorded in said predetermined zone;
• and
• e) recording said user information into each zone of said optical disk correspondingly to said obtained optimum recording power in accordance with the identified one of said first and second modulation systems.

An optical disk recording control apparatus in which test write data are written as test writing in an optical disk so that user information is recorded in said optical disk on the basis of a result of the test writing, said apparatus comprising:

• a judgment means connected to an external unit, for judging a modulation system of user information in accordance with identification information possessed by said optical disk, and outputting a control signal concerning said modulation system;
• a test write pattern generating means received a code configuration of said modulation system identified by said judgment means, for generating a test write pattern constituted by densest and sparsest patterns correspondingly to the code configuration;
• a test write pulse recording means connected to said test write pattern generating means, for generating a test write pulse string from said test write pattern and recording said test write pulse string in a predetermined zone of said optical disk;
• an optimum recording power calculation means for obtaining optimum recording power for said predetermined zone on the basis of a densest pattern waveform and a sparsest pattern waveform so that the zero level of the densest pattern waveform coincides with the zero level of the sparsest pattern waveform in said test write pulse string recorded in said predetermined zone by said test write pulse recording means;
• and
• a user information recording means connected to said optimum recording power calculation means, for recording said user information into each zone of said optical disk correspondingly to said obtained optimum recording power in accordance with said modulation system.