Patent ID: 8031572

Claim:
An optical disc device comprising: an optical pickup which records data on a disc, or reproduces data recorded on the disc; a data encoder which modulates data to be recorded to convert the data into a predetermined data format; a recording timing setting means which sets a timing of recording the modulated data on the disc; a phase error detection means which measures error amounts of marks and spaces constituting the data recorded on the disc from positions where the marks and spaces should be properly located; an error convergence means which calculates error information indicating optimum positions of the marks, based on the error amounts detected by the phase error detection means; a recording timing calculation means which calculates a correction value for the recording timing to be set on the recording timing setting means, based on the error information outputted from the error convergence means; and a control means which feedbacks an output of the recording timing calculation means to the recording timing setting means under a predetermined convergence condition, thereby to optimize a recording condition.