Apparatus and method for recording and reproducing digital-data

Details Apparatus and method for recording and reproducing digital-data Apparatus and method for recording and reproducing digital-data

1975-07-10

1977-01-04

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 51, G11B 500

Patent

active

040018849

ABSTRACT:
A series of digital words are demultiplexed into two groups and recorded on parallel tracks of a magnetic tape. The digital information is phase encoded upon the two tape channels and during playback the magnetic flux reversals on each channel are separately detected. The peak level of the detected signal is sensed and a peak signal pulse generated corresponding to the occurrence of the peak of the detected signal. Means are additionally included for setting the minimum threshold of the incoming signal necessary to generate a signal pulse so as to provide a level of immunity to system noise. The peak signal pulses are decoded to reconstruct the original data signal and a clocking signal. The data from each of the channel decoders is clocked into respective channel shift registers and multiplexed into its original data word arrangement.

REFERENCES:
patent: 3727202 (1973-04-01), Fort
patent: 3731220 (1973-05-01), Besenfelder
patent: 3818501 (1974-06-01), Fiorino

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