Error Correcting Codes (ECC)
Example: VRC+LRC will correct all single bit errors
Forward error correction (FEC) Used if retransmission expensive
Fig 4.5b Stallings
1 0 1 1 0 1 1 1
1 1 0 1 0 1 1 1
0 0 1 1 1 0 1 0
1 1 1 1 0 0 0 0
1 0 0 0 1 0 1 1
0 1 0 1 1 1 1 1
0 1 1 1 1 1 1 0
Vertical Redundancy Check
Longitudinal Redundancy Check
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