Patent ID: 8547806

Claim:
An optical disc apparatus comprising: an optical head for emitting a laser beam for recording and reproducing, receiving reflected light due to reflection of the laser beam from a recording medium surface of an optical disc, and outputting an electrical signal corresponding to the received light; a signal amplifying unit configured to amplify the signal, derived from the reflected light, from the optical head and output a servo error signal and a reproduced signal; a focus control unit configured to perform a focusing point search operation by moving a focusing unit of the optical head in a direction substantially perpendicular to the recording medium surface of the optical disc until the laser beam is focused on the recording medium surface of the optical disc, and keep the focusing unit in the focused state; a tilt control unit configured to perform an adjustment to make the laser beam focused by the focusing unit perpendicular to the recording medium surface of the optical disc; a signal quality detection unit configured to detect a signal quality of the reproduced signal output from the signal amplifying unit; a modulating/demodulating unit configured to perform modulation and demodulation according to a modulation rule used on the recording medium surface of the optical disc; an interface unit configured to perform data communication with a host controller; a buffer memory for temporarily holding recording data supplied from the controller via the interface unit; and a control unit configured to reproduce a recorded area during a suspension of a recording operation, and when degradation of the recorded signal is detected by the signal quality detection unit, perform a tilt adjustment on the recorded area by use of the tilt control unit and detect a signal quality of the recorded signal after the tilt adjustment by use of the signal quality detection unit, and alter a recording parameter when the signal quality detection unit finds that the recorded signal is still degraded even after the tilt adjustment, and no tilt correction occurred in the tilt adjustment.