POWER CALIBRATION IN OPTICAL DISC DRIVES

摘要

A method comprising performing a first set of power calibration procedures on an optical record carrier at a first recording speed in a first set of calibration areas and performing a further set of power calibration procedures on the optical record carrier at a recording speed different from the first recording speed, wherein the further set of power calibration procedures partly uses information from the first set of calibration areas is disclosed. The technique is useful in scenarios where the recording is required to be done with more than one speed on the same optical record carrier. The technique reduces the overall power calibration time and increases the number of power calibrations that can be done on the optical record carrier. The technique is useful for data, audio and video recorders.