Disc device

Abstract

Abstract PURPOSE:To restore a disc to a normal reproducing state from a position where tracking error takes place by counting a reference mark on the disc at each detecting and shifting a head based on an error address to a prescribed position when the count value and the track number are dissident. CONSTITUTION:A reproducing signal obtained from the disc 1 by the optical head 11 is transmitted to a limit section 39 via a binary coding circuit 31 and a demodulation circuit 32 and the track number is discriminated. On the other hand, every time when the reference position mark on the disc 1 is detected by a position detector 9, the counter is counted up and given to the control section 39. When the count value and the track number are dissident, the control section 39 stops the reproduction, obtains an error address from the track number and the count value of the address counter 38, drives a driver 29 to a position subtracting ''1'' from the value, and the head 1 is opposed, then jumped by one step, allowing to restart normal reproduction.

Inventors

• 👤 Katsumi Kimoto
• 👤 木本　克己

Bibliographic Details