Optical card reproducing apparatus provided with a function of g

Details Optical card reproducing apparatus provided with a function of g Optical card reproducing apparatus provided with a function of g

1991-09-24

1993-07-06

Psitos, Aristotelis

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 54, 369 59, G11B 700, G11B 509

Patent

active

052260267

ABSTRACT:
For a recording medium wherein respective sectors forming respective tracks are sectioned into a plurality of blocks consisting of data regions in which data are recorded and pattern parts representing to be data top portions, there is provided a generating circuit in which the timing when a pattern detecting signal is to be detected in the first pattern part is anticipated on the basis of a data signal reproduced by an optical head or the like by using a counter and a pseudo pattern detecting signal is generated so that, even if it fails to detect the pattern detecting signal in the first pattern part, the data demodulation in the first data region will not lack.

REFERENCES:
patent: 4672597 (1987-06-01), Yamazaki
patent: 4853920 (1989-08-01), Hosoya et al.
patent: 4862443 (1989-08-01), Tsuji et al.
patent: 4885458 (1989-12-01), Horiguchi et al.
patent: 4908811 (1990-03-01), Yokogawa et al.
patent: 5065384 (1991-11-01), Yokogawa

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