Device for interrogating and correcting a serial data signal

Details Device for interrogating and correcting a serial data signal Device for interrogating and correcting a serial data signal

1982-04-05

1984-07-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 39, G11B 509

Patent

active

044620527

ABSTRACT:
A device for the interrogation and correction of a data signal which adopts a finite number of discrete signal values in a consecutive series of data cells. The transitions between the signal values exhibit a nominal minimum spacing. The signal is periodically interrogated with a period which amounts to, at the most, half of said minimum spacing. If a finite series of successive interrogation values exhibits a permissible pattern, the data value is directly derived therefrom (36). There is a set of further patterns which are not permissible, but which do not deviate excessively from a permissible pattern; the associated data value of the corresponding permissible pattern is then simulated. In the other cases an error signal (34) is formed. The pattern has a length which exceeds the length of a data cell. The inherent redundancy of the data signal is thus partly used for the correction of errors.

REFERENCES:
patent: 4394762 (1983-07-01), Nabeshima

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