Abstract
We present an instrumental approach on how to assess the perceptual quality of voice transmissions in IP-based communication networks. Our approach is end-to-end and uses combinations of common codecs, loss concealment algorithms, playout schedulers, and ITU’s quality assessment algorithms E-Model and PESQ. It is the first method that takes the impact of playout rescheduling and non-random packet loss distributions into account. Non-random packet losses occur if a rate-distortion optimized multimedia streaming algorithm forwards packets dependent on the packets’ importance.
Our approach is implemented in open-source software. We have conducted formal listening-only tests to verify the accuracy of our quality model. In the majority of cases, the human test results show a high correlation with the calculated predictions.
This work has been supported by Deutsche Forschungsgemeinschaft (DFG) via the AKOM program.
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References
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Hoene, C., Wiethölter, S., Wolisz, A. (2004). Predicting the Perceptual Service Quality Using a Trace of VoIP Packets. In: Solé-Pareta, J., et al. Quality of Service in the Emerging Networking Panorama. WQoSR QofIS ICQT 2004 2004 2004. Lecture Notes in Computer Science, vol 3266. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30193-6_3
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DOI: https://doi.org/10.1007/978-3-540-30193-6_3
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