Adjustable error-correction composite Reed-Solomon encoder/syndrome generator
US5444719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1993 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/35
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.