Speed invariant decoding of digital information from a magnetic

Details Speed invariant decoding of digital information from a magnetic Speed invariant decoding of digital information from a magnetic

1974-09-30

1976-08-10

Sloyan, Thomas J.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 51, G11B 509

Patent

active

039745236

ABSTRACT:
A method and apparatus are provided for decoding digital information stored on magnetic tape. The "zero" and "one" bits are represented respectively on the tape by "short" and "long" distances between flux transitions. Decoding is accomplished by measuring the time between flux transitions and comparing that time with a reference time. Times longer than the reference time are decoded as "ones" while time intervals shorter than the reference time are decoded as "zeroes." To make the decoding independent of variations in tape speed the reference time is variable and in particular is made dependent on the tape speed. This is accomplished by updating the reference time based on previous "long" and "short" intervals between flux transitions. Circuitry is provided in which the various times are converted to voltages which are appropriately sampled and updated in accordance with the tape speed.

REFERENCES:
patent: 3235855 (1966-02-01), Woo
patent: 3644910 (1972-02-01), Smith
patent: 3711843 (1973-01-01), Galvagni et al.
patent: 3720927 (1973-03-01), Wolf
patent: 3727202 (1973-04-01), Fort
patent: 3750108 (1973-07-01), Jensen
patent: 3763353 (1973-10-01), Nassimbene
patent: 3794812 (1974-02-01), Bryant

Affiliated with

Also associated with

Rating

Speed invariant decoding of digital information from a magnetic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speed invariant decoding of digital information from a magnetic , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed invariant decoding of digital information from a magnetic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1745410