Prediction of DVD recordable recording parameters of a dual-layer disc

摘要

When shifted to the second layer from the first layer during the recording of dual layer DVD, and a method and apparatus for adjusting the operating conditions. Calibration of the first layer before recording, the parameters of the beta target laser power and a difference of the layers between the two is obtained from the information field of the disc. Distance between layers is measured. When shifted to the second layer from the first layer, it is obtained by the beta target laser power and the second layer, utilizing the current value of the shift immediately before by adding the difference obtained during calibration. is adjusted by the focus signal, adds the difference is compensated for temperature deviation. Tilt signal is not corrected. In this way, the shift between the second layer and the first layer is an executable quickly without calibration independent.