Log area ratio
Log area ratios (LAR) are a simple way to represent the reflection coefficients used in linear prediction for encoding signals over a channel. Each reflection coefficient r_k has a corresponding LAR value. LARs are easier to compute than line spectral pairs (LSPs), but they are generally less efficient for compression. While modern codecs mainly use LSPs, older codecs such as GSM-FR still use LARs.
This page was last edited on 2 February 2026, at 02:23 (CET).