Optical disk replay device which varies a delay and frequency of

Details Optical disk replay device which varies a delay and frequency of Optical disk replay device which varies a delay and frequency of

1996-09-30

1998-02-03

Huber, P. W.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

369 60, G11B 5035

Patent

active

057151091

ABSTRACT:
An optical disk replay device for replaying information from an optical disk recorded in a modified constant angular velocity (MCAV) format. The optical disk replay device has an optical head to output a reproduced signal based on the information stored in the optical disk. The signal from the optical head is passed through a series of delay circuits which output delayed signals based on the reproduced signal. Thereafter, a calculating circuit sums, or subtracts, the delayed signals and outputs an intermediate reproduced signal to a band limiting circuit which attenuates the frequency of the intermediate reproduced signal. A control circuit changes the amount of delay imparted by the delay circuits and to adjust the frequency range of the band limiting circuit.

REFERENCES:
patent: 3567849 (1971-03-01), Takayanagi et al.
patent: 4786989 (1988-11-01), Okamura et al.
patent: 5414689 (1995-05-01), Maeda et al.
patent: 5440434 (1995-08-01), Kanegae

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