US 2001/0026516 A1 · Optical disc device and recording power determining method

Abstract

The invention provides an optical disc device and a method of determining an optimal laser power for data recording by trial recording before recording actually user data even when there are fingerprints in the test track area for the trial recording. The BER (Byte Error Rate) is detected in each recorded sector. If the BER is less than a particular threshold value, the sector is taken as OK (good). Otherwise the sector is taken as NG (no good). While the peak power level is gradually changed or decreased from the power level at which half or more of the plural reproduced sectors are OK, a boundary peak power at which half or more of the sectors become NG is found. Based on the found boundary power, amount of the optimal peak power is determined.

Claims14

Dependent claims

A method of determining a recording power which is a laser emission power used for data recording in an optical disc device for recording data to an optical disc, the optical disc having a plurality of tracks each connecting to form a continuous spiral, each track comprising a plurality of sectors, the method comprising:

setting a plurality of recording power settings;
recording specific data to predetermined sectors in predetermined areas with a recording power at each of the set recording power settings, and reproducing the recorded data from each sector to detect, for each sector, a quality of a reproduction signal which is generated by reproducing the recorded data;
and
determining amount of the recording power to be used for data recording based on the detection result of the quality of the reproduction signal which is obtained for each sector and for each recording power setting.

1 more element

An optical disc device for recording data to an optical disc, the optical disc having a plurality of tracks each connecting to form a continuous spiral, each track comprising a plurality of sectors, the device comprising:

setting section for setting a plurality of recording power settings, the recording power being a laser emission power used for data recording;
recording section for recording specific data to predetermined sectors in predetermined areas with a recording power at each of the set recording power settings, and reproducing section for reproducing the recorded data from each sector to detect, for each sector, a quality of a reproduction signal which is generated by reproducing the recorded data;
and
determining section for determining amount of the recording power to be used for data recording based on the detection result of the quality of the reproduction signal which is obtained for each sector and for each recording power setting.

1 more element

Dependencies are inferred from the claim text.

Optical disc device and recording power determining method

Life of this patent

Optical disc device and recording power determining method

Life of this patent

Abstract

Claims14