Longitudinal redundancy check

In telecommunication, a longitudinal redundancy check (LRC, horizontal redundancy check) is a system of error control based on the formation of a block check following preset rules.

• The block check formation rules are applied in the same manner to each character.
• A combination of longitudinal and vertical redundancy check allows the detection and correction of single bit errors.

Source: from Federal Standard 1037C and from MIL-STD-188