Question

Difference between the odd and even parity systems?

Answer 1

Here's an example of odd parity. The transmitted message 01000000 has only one "1" in it. Converting this to odd parity adds a zero, which yields 0 01000000. The total number of "1" digits in the message remains one, which is an odd number. If a message is 10101100, that message has four 1s in it, giving an even number. Turning it into odd parity adds a "1" at the start, yielding 1 10101100.

With even parity, the results would have been reversed. The first message (01000000) would have a "1" added, yielding 1 01000000. The second message (10101100) already has an even number of "1" bits, to the parity message would be 0 10101100.