Method and apparatus for storing data on magnetic or optical med

Details Method and apparatus for storing data on magnetic or optical med Method and apparatus for storing data on magnetic or optical med

1982-10-13

1987-01-06

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 45, G11B 509

Patent

active

046351418

ABSTRACT:
Method and apparatus for storing data on a recording medium wherein the method includes grouping digital binary signals into chunks of N bits where N is an integer greater than 1. The value of each of the N bit chunks is determined and converted into a symbol cell. Each symbol cell has a duration which is dependent upon the value of the corresponding N bit chunk. The symbol cell is recorded. The transition shift for each of a plurality of juxtapositions of symbol cells is determined, and the symbol cell duration is varied depending upon the compensation required from the determined transition shift. A system of reading out the recorded symbol cells is also disclosed.

REFERENCES:
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patent: 3792454 (1974-02-01), Lipp
patent: 4000512 (1976-12-01), Lau
patent: 4142215 (1979-02-01), Roberts
patent: 4245263 (1981-01-01), Rathburn
patent: 4245264 (1981-01-01), Allen
patent: 4373154 (1983-02-01), Balme et al.
patent: 4426667 (1984-01-01), Masher et al.

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