Pre-pit signal generating circuit, a semiconductor integrated circuit, recording and reproducing device, the pre-pit signal generating method

摘要

PROBLEM TO BE SOLVED: To obtain a prepit signal generation circuit 12 which can implement accurate prepit detection performance regardless of presence or absence of a recorded mark on a group track adjacent to a land prepit, a semiconductor integrated circuit 100, recording and reproducing apparatus, and a prepit signal generation method.;SOLUTION: A recording and reproducing apparatus is provided with; an optical recording medium 1 having a prepit; a recording and reproducing head 2 which emits a recording or reading optical beam to the optical recording medium 1 and outputs four signals detected by splitting the reflection light into four; and a prepit signal generation circuit 12 including a correction signal generation circuit which generates correction signals based on four signals received by the recording and reproducing head 2.;COPYRIGHT: (C)2003,JPO