Second ISCA/DEGA Tutorial and Research Workshop on Perceptual Quality of Systems

Berlin, Germany
September 4-6, 2006

Effects of Network Architecture on Perceived Audio Quality

Jan Erik Voldhaug, Erik Hellerud, Astrid Undheim, Erling Austreim, U. Peter Svensson, Peder J. Emstad

Centre for Quantifiable Quality of Service in Communication Systems, Norwegian University of Science and Technology, Trondheim, Norway

Subjective testing based on the ITU-R MUSHRA method has been used to evaluate the perceived quality of audio signals exposed to packet loss. A congested best-effort and a Differentiated Services (DiffServ) router were simulated to find models for the packet loss processes. Two different models were combined with three packet loss rates, three audio clips and two different error concealment (EC) schemes and the resulting audio quality was evaluated. Results show statistically significant effects of both audio clip, EC, and packet loss rate on perceived quality. No significant difference was found between the two network architectures, but interaction effects between the network architectures and both audio clip and packet loss rate were observed.

Full Paper

Bibliographic reference.  Voldhaug, Jan Erik / Hellerud, Erik / Undheim, Astrid / Austreim, Erling / Svensson, U. Peter / Emstad, Peder J. (2006): "Effects of network architecture on perceived audio quality", In PQS-2006, 137-142.