Single parity bit & Two-dimensional parity checksum schemes
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Suppose that the information content of a packet is the bit pattern 1111000010100101 and an even parity is being used
[a] What would be the checksum field in a single parity bit scheme?
[b] What would be the value of the checksum field for the case of a two-dimensional parity scheme? Your answer should be such that a minimum-length checksum is used.
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Solution Summary
Solution also explains the meaning of "even parity" for a bit sequence.
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Even parity for a bit sequence (single row/column) is achieved when number of 1 bits in "the bit sequence and the parity bit" is even. Which means --
* if number of 1 bits in bit sequence is even, parity bit will be set to 0, and
* if number of 1 bits in bit sequence is odd, parity bit will be set to 1.
[a] ...
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