| 摘要 |
A disc drive device capable of preferably executing detection of address information by land pre-pit even after data recording. When detecting address information by land pre-pit from a disc having a land and a groove formed as a recording track and address information recorded as land pre-pit on the land, a push-pull signal is digitized to generate a window signal (window generation circuit (31)), the push-pull signal is integrated during the period based on the window signal (integration circuit (32)) and address information by land pre-pit is extracted from the integrated signal (33, 34, 35, 26). |
