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Lea Skorin-Kapov, Mirko Sužnjević, and Irena Oršolić participated in the 10th International Conference on Quality of Multimedia Experience (QoMEX 2018), and the collocated QoE Management Workshop in Sardinia, Italy. In the main conference, Irena presented results of recent research efforts on YouTube QoE classification from encrypted traffic, and Mirko presented a poster on subjective assessment of different locomotion techniques in virtual reality environments. Lea presented a paper on emerging aspects in QoE modeling and their impact on QoE management in the QoE management workshop.
Irena Oršolić took part in the Summer School on "QoE management and implementation" organized by the EU H2020 QoE-Net at École polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland. The focus of the school was on developing approaches for QoE control and management schemes, allowing the participants to acquire skills on the development and implementation of QoE adaptation and control mechanisms and methods to evaluate the performance of QoE management schemes in real testbeds.
Ivan Slivar, Dunja Vučić and Irena Oršolić participated at the PhD forum organized in the scope of the 14th International Conference on Telecommunications (ConTEL 2017). Ivan presented results on his studies related to QoE-driven video encoding adaptation strategies for cloud gaming under network constraints, Dunja presented her research about QoE-driven service configuration strategies for multi-party mobile video conferencing, while Irena presented her work on YouTube QoE classification based on monitoring of encrypted traffic.
Irena Oršolić presented a paper co-authored with Lea Skorin-Kapov and Mirko Sužnjević about their ongoing research efforts aimed at investigating solutions for estimating end user QoE when watching YouTube videos, based solely on the analysis of encrypted traffic in mobile and WiFi networks. The paper discusses future work in the direction of developing a more general framework for the estimation of video streaming QoE. This work also received funding from Ericsson Nikola Tesla in Zagreb, Croatia.
Mirko Suznjevic held two seminars entitled: "Networking aspects of delay sensitive interactive applications" and "Networking aspects of delay sensitive interactive applications" at the University of Padova. The seminars were held within the course Wireless networks on the invite of assoc. prof. Claudio Palazzi.
Lea Skorin-Kapov presented a joint paper co-authored with Irena Oršolić, Dario Pevec, and Mirko Sužnjević on monitoring YouTube QoE based on the analysis of encrypted network traffic using a machine learning approach. The paper presents a system called YouQ which includes tools for monitoring and analysis of application-layer KPIs and corresponding traffic traces, and the subsequent use of this data for the development of machine learning models for QoE estimation based on traffic features. This work also received funding from Ericsson Nikola Tesla in Zagreb, Croatia.
Irena Oršolić and Ivan Slivar took part in the PhD forum organized in the scope of the 24th International Conference on Software, Telecommunications and Computer Networks (SoftCOM 2016). Irena presented research challenges related to cooperative QoE management schemes for multimedia applications, while Ivan presented results on his studies related to QoE-driven video encoding adaptation strategies for cloud gaming under network constraints.
A paper entitled "The impact of bandwidth limitations and video resolution size on QoE for WebRTC-based mobile multi-party video conferencing" has been presented at the 5th ISCA/DEGA Workshop on Perceptual Quality of Systems (PQS 2016).
Mirko Sužnjević presented a paper entitled "Cloud gaming in Education: Evaluation of Multiple Game Streams in a Shared WLAN" at the Zooming Innovation in Consumer Electronics International Conference (June 1-2, 2016) in Novi Sad, Serbia.
Ivan Slivar presented a paper entitled "Analysis and QoE evaluation of cloud gaming service adaptation under different network conditions: The case of NVIDIA GeForce NOW" at the Eighth International Conference on Quality of Multimedia Experience, QoMEX (June 6-8, 2016) in Lisbon, Portugal.
Ivan Slivar presented a paper entitled: "Cloud Gaming QoE Models for Deriving Video Encoding
Adaptation Strategies" at the ACM Multimedia Systems 2016 Conference (MMSys 2016) held in Klagenfurt am Wörthersee, Austria.
The paper presents the results of a subjective laboratory study involving 52 players and two different games aimed at identifying QoE-driven video encoding adaptation strategies. Empirical results are used to derive analytical QoE estimation models as functions of bitrate and framerate, while also taking into account game type and player skill. Results have shown that under certain identified bandwidth conditions, reductions of framerate lead to QoE improvements due to improved graphics quality.
Ivan Slivar presented a paper entitled "User Customization of the GamingAnywhere Android Mobile Client Interface" at The 14th International Workshop on Network and Systems Support for Games (December 3-4, 2015) held at FER in Zagreb, Croatia. NetGames 2015 was chaired by Maha Abdallah and Mirko Sužnjević.
Lea Skorin-Kapov participated at the NSF/FCC Workshop on Tracking Quality of Experience in the Internet (October 21-22, 2015) hosted at Princeton, NJ, USA. Here is the topic of the given talk focused on the potential and challenges of cooperative QoE management.