What Does Longitudinal Redundancy Check (LRC) Mean?
a longitudinal redundancy check (LRC) is an error-detection method for determining the correctness of transmitted and stored data. LRC verifies the accuracy of stored and transmitted data using parity bits. It is a redundancy check applied to a parallel group of bit streams. The data to be transmitted is divided into transmission blocks into which additional check data is inserted. This term is also known as a horizontal redundancy check.
Techopedia Explains Longitudinal Redundancy Check (LRC)
LRC generally applies to a single parity bit per bit stream. Although simple longitudinal parities only detects errors, a combination with additional error control coding, such as a transverse redundancy check, are capable of correcting errors. LRC fields consist of one byte containing an eight bit binary value. LRC values are calculated by transmitting devices, which append LRC to messages. The device at the receiving end recalculates the LRC on receipt of the message and compares the calculated value to the actual value received in the LRC field. If the values are equal, the transmission was successful; if the values are not equal, this indicates an error. LRC is generated through the following steps:
