A Hybrid Signal-and-Link-Parametric Approach to Single-Ended Quality Measurement of Packetized Speech

A hybrid signal-and-link-parametric approach to single-ended quality measurement of packetized speech is proposed. Trans-mission link parameters are used to determine a base quality for the test signal. The base quality is adjusted by degradation factors calculated from perceptual features extracted from the test signal. The degradation factors are based on Kullback-Leibler distances between a parametric model trained online for the extracted features and reference models of normative speech behavior. The proposed method overcomes the limita-tions of pure link parametric and pure signal-based methods. Index Terms — Quality measurement, VoIP, packet loss concealment, Kullback-Leibler distance