Forward error correction

In telecommunication, forward error correction (FEC) is a system of error control for data transmission, whereby the sender adds redundant data to its messages, which allows the receiver to detect and correct errors (within some bound) without the need to ask the sender for additional data. The advantage of forward error correction is that retransmission of data can often be avoided, at the cost of higher bandwidth requirements on average, and is therefore applied in situations where retransmissions are relatively costly or impossible.
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A system of error control for data transmission wherein the receiving device has the capability to detect and correct any character or code block that contains fewer than a predetermined number of symbols in error. (188 ) Note: FEC is accomplished by adding bits to each transmitted character or code block, using a predetermined algorithm.

<algorithm> (FEC) A class of methods for controling errors in a one-way communication system. FEC sends extra information along with the data, which can be used by the receiver to check and correct the data.
A CPU writing data to RAM is a kind of one-way communication - see error correcting memory and error checking and correction.
(1996-10-02)

forward error correction
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