Optical disk device controlling a revolution of a recordable optical disk according to a displacement between a phase of a sector synchronizing signal generated from a data-writing reference clock signal and a phase of a synchronizing signal obtained from address information

An optical disk device recording information on a recordable optical disk including address information indicating a position of a part of the optical disk having not recorded any data yet, and reproducing information from the optical disk, the device comprising:

• a reference clock signal generating unit generating a data-writing reference clock signal used to obtain a data-writing timing upon recording data to the optical disk;
• a synchronizing signal generating unit generating a predetermined sector synchronizing signal from said data-writing reference clock signal;
• a data demodulating unit reading address information indicating a position on the optical disk from data recorded on the optical disk so as to demodulate the address information into a predetermined synchronizing signal;
• a displacement detecting unit detecting a displacement between a phase of said sector synchronizing signal and a phase of said synchronizing signal;
• and
• a data-writing control unit controlling a data-writing upon performing an additional recording to the optical disk by controlling a revolution of the optical disk dynamically according to said displacement.