High speed tape duplicating machine

Details High speed tape duplicating machine High speed tape duplicating machine

1988-10-04

1991-06-04

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Record copying

360 32, G11B 586

Patent

active

050218930

ABSTRACT:
A duplicate recording system uses video cassettes for storing master library recordings. On both the recording and the duplicating ends of the system, all signals are buffer stored in an electronic memory while the signals are in a digital form. This buffer storage completely isolates the recording/reproducing steps so that the usual parameter of restraints disappear. For example, the duplication ratio may be any value within the capabilities of the recording/reproducing machines. This isolation eliminates expensive setup procedures heretofore required to switch from one to another duplicating ratio. The buffer storage also provides a more precise transfer with greater fidelity of the recorded signals. A computer calculates a smoother analog curve when the digital-to-analog conversion is made.

REFERENCES:
patent: 4375655 (1983-03-01), Korth et al.
patent: 4703465 (1987-10-01), Parker
patent: 4707750 (1987-11-01), Anderson et al.
patent: 4766581 (1988-08-01), Korn et al.
patent: 4786983 (1988-11-01), Massari
patent: 4811325 (1989-03-01), Sharples, Jr. et al.
patent: 4835682 (1989-05-01), Kurachi et al.
patent: 4899230 (1990-02-01), Sheritt

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