longitudinal parity check (LPC)
Longitudinal Parity Check (LPC) is a longitudinal parity procedure used in voice coding in mobile radio systems. In this error protection procedure, the cross sum of a data block is set to either even or odd parity by adding a parity bit of 0 or 1. The Longitudinal Parity Check (LPC) corresponds to the Longitudinal Redundancy Check ( LRC).