Adjustable error-correction composite Reed-Solomon encoder/syndr

Details Adjustable error-correction composite Reed-Solomon encoder/syndr Adjustable error-correction composite Reed-Solomon encoder/syndr

1993-01-26

1995-08-22

Baker, Stephen M.

Excavating

371 401, 371 41, H03M 1300

Patent

active

054447194

ABSTRACT:
A composite encoder/syndrome generating circuit computes both check symbols and error syndromes using a single set of multiplier devices with varying tap weights having values that provide a maximum preselected error correction capability but is readily adjustable, such as by programmable latches, to eliminate from the circuit selectable multiplier devices to reduce the error correction capability without requiring a change in the tap weight values. The circuit may be used to increase or decrease error correction capability (a) according to which of a plurality of concentric bands of recording tracks is being accessed in a banded direct access data storage device, (b) according to noise level as sensed in a data communications channel having an output subject to noise, or (c) according to changes in sending rates in a sending device that sends data at variable rates.

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US Serial No. 07/644,160 filed Jan. 22, 1991, "Modular Implementation for a Parallelized Key Equation Solver for Linear Algebraic Codes", IBM Doc. SA9-91-003.
US Serial No. 07/917,704 filed Jul. 20, 1992, Programmable Sequential Solution of Key Equation for Linear Algebraic Codes, IBM Doc. SA9-92-019.
G. Fettweis, M. Hassner, A Combined Reed-Solomon Encoder and Syndrome Generator with Small Hardware Complexity, IEEE 0-7803-0593-0/92, pp. 1871-1874.

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