Interactive video services, like video telephony, social TV or on-line gaming, are about to become a significant part of the service portfolio for telecommunication service providers. As the future commercial success of these services will depend essentially on their end-to-end quality as perceived by the end user, appropriate Quality-of-Experience (QoE) measurement methods are of paramount imp...

HTTP Adaptive Streaming (HAS) has become a prevailing technology for media delivery nowadays. It enables high quality streaming of media content over the internet delivered from conventional HTTP web servers. However, its on-off traffic pattern constructed by segmented transmission can lead to some performance problems, such as instability, inefficiency and unfairness, while multiple clients co...

Given the growing importance of quantitative relationships between user-perceived Quality of Experience (QoE) and network Quality of Service (QoS), this paper investigates the IQX hypothesis for two voice codecs, iLBC and G.711. This hypothesis expresses QoE as an exponential function of QoS degradation. The experiments are carried out in a controlled environment using the softphone SJPhone, th...

This paper is devoted to the problem of evaluating the quality of experience (QoE) for a given multimedia service based on the values of service parameters such as QoS indicators. This paper proposes to compare two self learning approaches for predicting the QoE index, namely the approach based on logic circuit learning and the approach based on fuzzy logic expert systems. Experimental results ...

Rapid service creation stemmed from the convergence of fixed line and mobile telephony with the Internet has made user acceptance to be a crucial factor for the success of the telecommunication business. Telecommunications research, therefore, can no longer be considered only from the pure engineering perspective. Within this paper, we present the concept of service quality for future NGN netwo...

The applicability of advanced mobile technologies in the m-Health domain has led to a number of studies and (limited) commercial products supporting delivery of health services to remote users. A key issue regarding successful delivery and acceptance of such services is meeting their Quality of Service (QoS) and Quality of Experience (QoE) requirements, focusing on technical aspects and end use...

Multi-party video conferencing is a highly delay-sensitive and resource-intensive service. A key challenge faced by service providers is meeting end user Quality of Experience (QoE) requirements given bandwidth limitations, especially in mobile networks. Service adaptation mechanisms may thus be employed to adapt the audiovisual quality so as to meet current network conditions and resource avai...

This paper presents an enhancement to a category of Adaptive Video Streaming solutions aimed at improving both Quality of Service (QoS) and Quality of Experience (QoE). The specific solution used as baseline for the work is the Smooth Streaming framework from Microsoft. The presented enhancement relates to the rate adaptation scheme used, and suggests applying a stochastic or fixed/unique setti...

In this paper, a field test platform called OTTCAP (OTT Services Capture and Analyze Platform) is developed for capturing and analyzing QoS (Quality of Service) and QoE (Quality of Experience) parameters of OTT (over-the-top) services in HSPA+ (Evolved High Speed Packet Access) networks, including Network-Level and Application-Level QoS parameters, terminal parameters and wireless environment p...