奇偶校验是一种校验代码传输正确性的方法。根据被传输的一组二进制代码的数位中“1”的个数是奇数或偶数来进行校验。采用奇数的称为奇校验，反之，称为偶校验。采用何种校验是事先规定好的。通常专门设置一个奇偶校验位，用它使这组代码中“1”的个数为奇数或偶数。若用奇校验，则当接收端收到这组代码时，校验“1”的个数是否为奇数，从而确定传输代码的正确性。

-Parity is a method of checking the correctness of the code transmission. Be transmitted according to a set of binary digital code of " 1"　bits is odd or even to verify. Using odd as odd parity, and vice versa, as even parity. What kind of validation is specified in advance good. Usually set up a dedicated parity bit, it makes this group code " 1"　is odd or even. If using odd parity, then when the receiver receives this set of code, check the " 1"　if the number is odd, to determine the transmission code is correct.