Incoherence of the Signal-Based Passive Speech Quality Estimation Models

Over the recent past there has been a significant improvement in devising perceptual models for passively estimating the speech offered by telecommunication networks. Telephony networks, on the other hand, are being adapted to support voice over IP. To date, listening quality of voice over IP remains dominated by packet loss. In this paper we claim that passive signal-based speech quality estimation models are inherently incapable of capturing a packet loss event. We support our claim in the light of the underlying DSP-based techniques.