DECIDING METHOD BETWEEN A DVD SINGLE DISK AND A DVD REWRITABLE DISK, PARTICULARLY CONCERNED WITH DECIDING A DISK WITH A BORDER VALUE CONDITION BY AN ARITHMETIC OPERATIONAL COMBINATION BETWEEN A POOL IN SIGNAL AND A FOCUS ERROR SIGNAL

摘要

PURPOSE: A deciding method between a DVD single disk and a DVD rewritable disk is provided to decide a disk with a border value condition by an arithmetic operational combination between a PI(Pool In) signal and a focus error signal, thereby distinguishing a DVD recorder disk while enabling a proper tuning process for the DVD recorder disk. CONSTITUTION: A maximum area value(S2) of a DVD RW disk displays an arithmetic operational combination value between a maximum value for a focus error area value and a maximum value for a PI area value. A minimum area value(S3) of a DVD recorder disk displays an arithmetic operational combination value between a minimum value for the focus error area value and a minimum value for the PI area value. A maximum area value(S4) of the DVD recorder disk displays an arithmetic operational combination value between a maximum value for a focus error area value and a maximum value for a PI area value of the DVD recorder disk.