error correction


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error correction

[′er·ər kə‚rek·shən]
(communications)
Any system for reducing errors in an incoming message, such as sending redundant signals as a check.
(computer science)
Computer device for automatically locating and correcting a machine error of dropping a bit or picking up an extraneous bit, without stopping the machine or having it go to a programmed recovery routine.
(electricity)
Correction of time errors in interconnected alternating-current power systems resulting from deviations from normal frequency, in order to make all areas synchronous.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

error checking

Testing for accurate transmission of data over a communications network or internally within the computer system. See error messages, parity checking, CRC and validate.

validity checking

Routines in a data entry program that test the input for correct and reasonable conditions, such as account numbers falling within a range, numeric data being all digits, dates having a valid month, day and year, etc. Checking the spelling of proper names, if possible, can also be part of validity checking. See validate for a comparison of "validate" and "verify."

Errors Can Be Critical


It may seem like a dull part of the IT world, but data entry validation can be a very critical issue when there is insufficient validity checking of the input. In late 2001, a Japanese stockbroker erroneously placed a sell order for 610,000 shares of stock at 16 yen, when it should have been for 16 shares at 610,000 yen. Even though the error was caught two minutes after the order was placed, the broker's liability was estimated to be up to USD $100 million.
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References in periodicals archive ?
(1) Forward error correction (FEC) Adds error correction code to data before transmission, so that if an error occurs during transmission, it can automatically be corrected on the receiving end using the correction code.
###33###The indirect error correction method mainly focus on local###3.8567###1.3842
The new approach embeds the secret message bit stream by modifying the QR code module in sequence to avoid excessive consumption of QR code error correction capacity, and it meets the requirement of the security and robustness for the QR secret hiding system.
The encoding region includes data and error correction codewords, format information and version information.
It allows sporadic timing errors in the circuit and relies on a forward error correction that already exists in the system to correct the errors.
In order to verify the validity of the LS-SVM wind prediction model with error correction, the power data of two wind farms at home and abroad were chosen to carry out experiments.
Purpose of L2 Learning is another factor to make teachers to decide that which method of error correction will be effective for learners.
The error correction model is then used to determine the nature of the relationship between dividends and earnings.
This is a necessary step toward quantum error correction, which is a critical requirement for building a practical and reliable large-scale quantum computer.
In (Chang et al., 2010) the main role of Forward Error Correction (FEC) is given, it plays the main role for correcting errors in computer networks, particularly when poor Signal to Noise Ratio (SNR) environments are encountered [8].
After combining with the following 8-bit SAR ADC code using the error correction algorithm, the proposed 11-bit ADC could tolerate up to 3.125% of single slope quantization noise.