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O. Golderos Blanco:
"Delay Impacts On Human-To-Human Mediated Interaction And End-User Quality Perception";
Supervisor: M. Rupp, S. Egger; Institut für Nachrichtentechnik und Hochfrequenztechnik, 2010; final examination: 2010.

This Master Thesis analyzes the human to human mediated communications and how the mediated conversation is affected by the communications defects. It deals with the delay impacts on communications and the end-user quality perception.
An experimental setup is used which allows adjustment of delay network param- eter to study their impact on the perceived connection quality. In this work it has been developed several algorithms that permit to obtain relevant statistics related to each scenario and network condition. Thus, it has been built a test bed that permits to obtain subjective (MOS) and objective parameters in order to analyze the delay effects on speech quality.
It has been designed 15 test scenarios in which there are different degrees of interactivity. A practice test has been performed involving 34 test persons. The results of the sessions test are showed and commented using a subjective and objec- tive point of view.
Finally, this work analyzed the results obtained so we can compare the delay impact as the one specified in the ITU recommendations

http://publik.tuwien.ac.at/files/PubDat_191033.pdf