Subjective assessment and instrumental prediction of mobile online gaming on the basis of perceptual dimensions
The assessment of the perceived quality of the user (Quality of Experience) of pure audio and video material differs in many ways from the quality of computer games. The later possess a variety of factors due to their interactive nature. Not only factors of complex and innovative game systems have an impact on the QoE, but also the players themselves. A quality judgment, that results by comparing the expected and perceived composition of an entity, depends highly on the preferences, expectations and abilities of the player.
In this still young area of research standard methods for determining the QoE are not directly applicable. This is apparent since in a task oriented human-computer interaction the goal should be achieved with minimal effort. However in a game the player exerts an effort in order to influence the outcome and thereby feels emotionally attached. Thus new concepts such as immersion and flow, a state of happiness while being in an equilibrium between competence and challenge, appear.
An analysis of the gaming market shows, that the proportion of mobile games has risen sharply in recent years. Mobile games are special in a sense that mobile devices such as smartphones or tablets were originally not designed for games and are therefore not optimally adapted to them. This also applies to the new concept of cloud gaming, where the entire game is executed on a server and only the video and audio material is transferred to the end user.
Aim of the project
The aim of this research project is to develop methods to assess the QoE of mobile games. In addition, based on a database containing subjective quality judgments, a model similar to the well known E-model should be constructed to predict the QoE. The following concrete steps are planned for this purpose:
- Set up and modification of a testbed for conducting experiments including a cloud gaming system for mobile games
- Development of a classification of games to choose representative games and identify system and user factors
- Building a questionnaire covering a large space of relevant quality dimensions
- Identification of quality-relevant perceptual dimensions and analysis of their impact on the overall quality
- Analyzing the performance of current objective metrics which were proposed for different contents and services in mobile gaming
- Building a QoE model based on game, system and network characteristics as well as user and context factors
|Project Number:||MO 1038/21-1|
List of Publications
|Author||Möller, Sebastian and Schmidt, Steven and Beyer, Justus|
|Title of Book||Fifth Int. Workshop on Quality of Multimedia Experience 2013 (QoMEX 2013)|
|Location||Klagenfurt am Wörthersee, Austria|
|Abstract||With the advent of computer games, game providers try to improve their users' experience by ensuring high platform and transmission performance, by developing new interaction techniques and more interesting interfaces, or by launching new game ideas. However, it is still unclear how this affects user-perceived Quality of Experience (QoE). In this paper, we provide an overview of the most-discussed concepts in computer gaming evaluation, taking the perspective of a quality engineer who identifies influence factors, quantifies them in terms of performance metrics, and analyzes their impact on perceived quality features. The concepts are grouped in terms of a taxonomy which can be used for developing empirical test methods as well as instrumental prediction models for computer gaming QoE.|