pariteetkontrolle

Pariteetkontrolle, often translated as parity check, is a simple form of error detection used in computing and digital communications. Its primary purpose is to detect single-bit errors in a transmitted data stream. The core principle involves adding an extra bit, known as the parity bit, to a block of data. This parity bit is set to either 0 or 1 based on the number of '1's in the original data block.

There are two main types of parity checks: even parity and odd parity. In even parity, the parity bit is set so that the total number of '1's in the data, including the parity bit, is even. Conversely, with odd parity, the parity bit ensures the total number of '1's is odd. When the data is received, a parity check is performed again. If the received data, when checked using the same parity rule, does not conform to the rule, it indicates that an error has occurred.

Pariteetkontrolle is a very basic error detection method and has limitations. It can only detect an odd number of bit errors. If an even number of bits are flipped during transmission, the parity check will not detect the error, and corrupted data will be accepted as valid. Despite its simplicity and limitations, pariteetkontrolle is still used in some low-level communication protocols and memory systems where the probability of single-bit errors is relatively low and a simple, efficient detection mechanism is desired. More robust error detection and correction codes are employed in applications requiring higher reliability.