Error Checking and Correction

Why Trust Techopedia

What Does Error Checking and Correction Mean?

Error checking and correction is a process aimed at ensuring and improving data retrieval reliability. Data reliability is absolutely critical for processing, record keeping, and e-commerce.

Advertisements

Data exchanged through channels must be verified at the source and retrieval points. This data exchange may apply to a variety of paradigms, including stored data and a processor or two computers over a LAN/Internet connection. Both stored and transmitted data involve physical interaction, which creates added noise and may lead to a change in value.

Techopedia Explains Error Checking and Correction

Powerful error checking and correction methods are continually in the development process. An early simple method involved multiple, repeated, and compared data submissions. However, because this method abuses physical resources, it is not frequently used.

Perhaps the most efficient error-detection technique is the parity check, where a single extra bit is added at the end of each byte. Its value is decided according to a fixed rule, that is, keeping the number of “1’s” even or odd per byte. The data receiver processes each byte and estimates the parity bit. If a comparison shows a difference in data, the receiver asks the transmitter to resend the data after indicating a transmission error.

Advertisements

Related Terms

Margaret Rouse
Editor

Margaret jest nagradzaną technical writerką, nauczycielką i wykładowczynią. Jest znana z tego, że potrafi w prostych słowach pzybliżyć złożone pojęcia techniczne słuchaczom ze świata biznesu. Od dwudziestu lat jej definicje pojęć z dziedziny IT są publikowane przez Que w encyklopedii terminów technologicznych, a także cytowane w artykułach ukazujących się w New York Times, w magazynie Time, USA Today, ZDNet, a także w magazynach PC i Discovery. Margaret dołączyła do zespołu Techopedii w roku 2011. Margaret lubi pomagać znaleźć wspólny język specjalistom ze świata biznesu i IT. W swojej pracy, jak sama mówi, buduje mosty między tymi dwiema domenami, w ten…