Overhead | Approach type | Error method |
One or more bits add to the character | ARQ | Parity bit |
One bit per character plus LRC character | ARQ/FEC | LRC |
Checksum character at end of message | ARQ | Checksum |
CRC bytes at end of message | ARQ | CRC |
Hamming bits inserted into data stream | ARQ/FEC | Hamming code |
One bit per character plus signature character | ARQ/FEC | Signature |