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Impact of the codec and various QoS methods on the final quality of the transferred voice in an IP network

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, , Citation Oldřich Slavata and Jan Holub 2015 J. Phys.: Conf. Ser. 588 012011 DOI 10.1088/1742-6596/588/1/012011

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1 Czech Technical University, Faculty of Electrical Engineering, Department of Measurement K13138, Technicka 2, 166 27 PRAGUE 6, Czech Republic

2 Czech Technical University in Prague, University Center for Energy Efficient Buildings, Nam. Sitna 3105, Kladno, Czech Republic

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1742-6596/588/1/012011

Abstract

This paper deals with an analysis of the relation between the codec that is used, the QoS method, and the final voice transmission quality. The Cisco 2811 router is used for adjusting QoS. VoIP client Linphone is used for adjusting the codec. The criterion for transmission quality is the MOS parameter investigated with the ITU-T P.862 PESQ and P.863 POLQA algorithms.

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10.1088/1742-6596/588/1/012011