Predicting the Perceptual Service Quality Using a Trace of VoIP Packets

  • Christian Hoene
  • Sven Wiethölter
  • Adam Wolisz
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3266)


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.


VoIP quality assessment playout scheduling rate-distortion optimized streaming 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Christian Hoene
    • 1
  • Sven Wiethölter
    • 1
  • Adam Wolisz
    • 1
  1. 1.Telecommunication Networks GroupTechnical University BerlinBerlinGermany

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