Bachelor and Master Theses

Title: User perceived Quality-of-Service for multimedia applications
Subject: Computer Science
Level: Advanced
Description: Quality of Service (QoS) is a wide term, usually defined as “the collective effect of service performance which determines the degree of satisfaction of a user of that service”. The goal of QoS is to provide guarantees on the ability of a system to deliver predictable results. For example, when talking about QoS for networks, the scope of QoS often include availability (uptime), bandwidth (throughput), latency (delay), and error rate, and it is used to describe overall experience an application or a user will receive over a network.

When designing multimedia streaming systems, Quality of Service has to be one of key issues. QoS parameters in such systems have to be presented in all components, from an application to a communication level in order to insure a certain level of QoS to a user. Thus we talk about user perceived QoS, application QoS and system QoS.

However, the ultimate measure of QoS in multimedia application is a user satisfaction. Streamed multimedia pass through a network to the end user. If the service quality (QoS) on the path to the end user is reduced, e.g., network is overloaded, the end user will perceive reduced quality. As a consequence the end user satisfaction in the service will decrease, which in turn has consequences on the revenue of the service provider. Hence, a user perceived QoS is becoming more important research field for industry.

In this thesis you will:

  • Study different aspects of Quality-of-Service in general
  • Evaluate different methods for quality assessment of video (both subjective and objective)
  • Define levels of QoS in terms of user perception, both theoretically and empirically by running experiments on different groups of people (e.g., show a video sequence in a classroom and ask students to fill in a questionnaire about perceived quality).
  • Investigate how encoding standards and network quality have an impact on the perceived QoS (i.e., find links between user-perceived QoS and network/application parameters)
Company: IDE
Prel. end date: 2006-10-27
Presentation date: 2006-09-07
Student: Riasat Abbas
IDT supervisor: Larisa Rizvanovic, +46-21-103198
Examinator: Damir Isovic
Damir Isovic, +46-21-103173

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