Question

compare lrc and vrc​

Answer 1

Serial communications often uses vertical redundancy checking (VRC) when it adds a parity bit to the transmitted character. Longitudinal (or horizontal) redundancy checking (LRC) adds a parity bit for all bits in the message at the same bit position. Vertical coding operates on a single character and is known as character error coding. Horizontal checks operate on groups of characters and described as message coding. LRC always uses even parity and the parity bit for the LRC character has the parity of the VRC code.