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2 2014

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The new, parameterised VT model for determining quality in the video-telephony service

100%

Uhl T. , Paulsen S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2014

tom Vol. 62, nr 3

431--437

This paper describes a new method for measuring and appraising the quality of the video stream in the video-telephony service in IP environments (VToIP). The method uses the so-called VS Model and belongs to the group of parameter-based measurement techniques (offline operation, i.e. without active measurement). It delivers results that come extremely close to those contained in the corresponding Perceptual Evaluation of Video Quality (PEVQ) curves. The method is quick and easy to use - a convincing argument for using this new QoS measuring method.

New Tool for Examining QoS in the VToIP Service

80%

Uhl T. , Nowicki K. , Paulsen S.

Journal of Telecommunications and Information Technology

2014

tom nr 1

10--15

This paper is dedicated to the subject of measuring QoS in the Video Telephony over IP (VToIP) service. QoS measurement models in general and then models designed specifically for measuring QoS in the VToIP service are presented. A new numerical tool for examining the quality of VToIP video streams VToIP is described. The tool’s functionality is then put to the test in a number of analysis scenarios. The results and insights gained from the analyses are then presented in several diagrams, and interpreted. The paper concludes with a summary and an outlook on further areas of work.