Information recording and reproducing device

Details Information recording and reproducing device Information recording and reproducing device

1992-03-20

1994-11-15

Pascal, Robert J.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 47, G11B 1732

Patent

active

053655010

ABSTRACT:
An information recording and reproducing device records, erases and reproduces information on and from a memory device. The memory device has pre-format sections. The information recording and reproducing device includes a pre-recorded area detection circuit for detecting a pre-recorded area having information predeterminately recorded and located on the memory device and timing control circuits for providing timing control of an information recording, erasing or reproducing operation according to a pre-recorded area detecting signal released from the pre-recorded area detection circuit, thereby enabling each timing of recording, reproducing, or erasing operation is accurately determined. The timing control may be performed according to both of the pre-recorded area detecting signal of the present invention and the conventional synchronization detection signal. In that case, if an error should occur in the synchronization detection signals, since the pre-recorded area detecting signal is released every time pre-recorded information for a sector mark or the like is reproduced, an accurate timing control without time lag is achieved according to the pre-recorded area detecting signals.

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patent: 5038339 (1991-08-01), Pasman et al.

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