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error correcting code (ECC)

  1. Error correction code( ECC) is an intelligent error detection code in which a subset of the disturbed characters can be corrected on the basis of the laws of formation. With this code, several check bits are added to the useful bits, from which the correct character is determined at the receiving point according to the probability principle. Whereas in the case of simple error detection, the only remedy for the occurrence of faults is to request the transmitter to retransmit the faulty data units, in the case of increased redundancy, correction of the corrupted data can be performed according to the probability principle. For this purpose, the damaged character is compared with valid characters at the receiving location and it is assumed that the character with the fewest deviations from the damaged character is the correct one. In error correction, a distinction is made between two standard methods: Backward Error Correction( BEC) and Forward Error Correction( FEC).
  2. In memory technology, error correction involves modules used in critical applications that use multiple bits for parity checking. With each memory access, the ECC bits are updated andchecked by the ECC algorithm. This can detect double bit errors and automatically correct single bit errors, so called Error Detection and Correction( EDC). For the detection of the double bit errors, the parity check is usually done with three parity bits per byte.
Englisch: error correcting code - ECC
Updated at: 01.12.2017
#Words: 228
Links: code, elliptic curve cryptography (ECC), error detection code (EDC), transmitter (TX), data
Translations: DE

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