公开(公告)号：US06643235B2

公开(公告)日：2003-11-04

申请号：US10218409

申请日：2002-08-15

申请人： Yukio Iijima ,  Nobuaki Minakuchi ,  Hidemi Takahashi ,  Yasushi Ueda ,  Makoto Okazaki

发明人： Yukio Iijima ,  Nobuaki Minakuchi ,  Hidemi Takahashi ,  Yasushi Ueda ,  Makoto Okazaki

IPC分类号： G11B509

CPC分类号： G11B19/04 ,  G11B7/0037 ,  G11B7/0053 ,  G11B7/00745 ,  G11B19/122 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/1403 ,  G11B20/1426 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2020/10888 ,  G11B2020/1269 ,  G11B2020/1274 ,  G11B2220/20 ,  G11B2220/2537

摘要： An optical disc recording and reproducing apparatus for recording and reproducing data in and from an optical disc by the use of the optical disc as a recording medium, comprises analog processing means including a binarization unit for subjecting a signal read from the optical disc to binarization and a servo unit for controlling recording and reproducing a signal in and from the optical disc; synchronous clock generating means for generating a synchronous clock signal which is synchronized with the signal read from the optical disc; address detecting means for detecting address information indicating a physical position on the optical disc based on the signal read from the optical disc, and outputting a signal indicating the address information and a signal indicating that the address has been detected when the address information has been detected; a sector counter for holding a sector count value of a sector as a recording unit on the optical disc, and updating the sector count value according to the synchronous clock signal and the signal output from the address detecting means; and gate signal generation switching means for generating gate a signal which controls the analog processing means, based on one of the sector count value held in the sector counter and information obtained from the analog processing means, according to the signal indicating that the address has been detected, which is output from the address detecting means.