Florian Mehm
Digital Educational Games, as one of the most important application areas of Serious Games, combine positive properties of digital games, such as strong motivation for players and inherent learning processes, with educational methods and technologies. Adaptive algorithms allow such games to be aligned automatically to the needs of different players, thereby increasing the learning efficacy. ...
Tomas Kupka
Video streaming has gone a long way from its early years in the 90’s. Today, the prevailing technique to stream live and video on demand (VoD) content is adaptive HTTP segment streaming as used by the solutions from for example Apple, Microsoft, and Adobe. The reasons are its simple deployment and management. The HTTP infrastructure, ...
Tiia Ojanperä
The volume of data transmitted across wireless and mobile networks continues to grow at a rapid rate. Videos already account for most of this data traffic, and their share is expected to grow even bigger in the near future. The thesis presents a novel video service architecture designed to optimise video streaming according to wireless ...
Johannes Schels
This thesis presents part-based approaches to object class detection in single 2D images, relying on pre-built CAD models as a source of synthetic training data. Part-based models, representing an object class as a deformable constellation of object parts, have demonstrated state-of-the-art results with respect to object class detection. Typically, the majority of part-based approaches rely ...
Zhijie Shen
In recent years, people have become accustomed to sharing and watching videos on the Internet. Particularly, the rapid advance in the technology of mobile devices has attracted users to produce and consume videos on the newly booming platform. With the technological innovation, a new life cycle of a video has reformed where people capture a ...
John Gilmore
Recently, there has been significant research focus on Peer-to-Peer (P2P) Massively Multi-user Virtual Environments (MMVEs). A number of architectures have been presented in the literature to implement the P2P approach. One aspect that has not received sufficient attention in these architectures is state management and state persistency in P2P MMVEs. This work presents and simulates ...
Paul B. Beskow
The computational demands of interactive multimedia applications are steadily increasing as consumers call for progressively more complex and intelligent multimedia services. New multi-core hardware architectures provide the required resources, but writing parallel, distributed applications remains a labor-intensive task compared to their sequential counter-part. For this reason a number of parallel programming models, tools and techniques ...
Dominik Strohmeier
To meet the requirements of consumers and to provide them with a greater quality of experience than existing systems do is a key issue for the success of modern multimedia systems. However, the question about an optimized quality of experience becomes more and more complex as technological systems are evolving and several systems are merged ...
Stefan Wieser
This thesis investigates flexible self-organizing overlay networks for multimedia delivery – networks that are dynamically built on existing infrastructure to support the preferences of applications using them. For example, consider a large sports event with several concurrent competitions, in which hundreds of thousands visitors produce and consume videos with their mobile devices. These devices connect ...
Zixia Huang
This dissertation investigates issues of performing synchronized distribution of time-correlated multi-modal continuous media data in the distributed interactive teleimmersion, and proposes approaches to solve these problems. The current best-effort shared Internet is unreliable in supporting bandwidth-savvy multimedia streaming, and frequent network jitter can contribute to the heterogeneity of distribution latencies (a.k.a., synchronization skews) within and ...
Mukesh Saini
Video surveillance is a very effective means of monitoring activities over a large area with cameras as extended eyes. However, this additional security comes at the cost of privacy loss of the citizens not involved in any illicit activities. Because an adversary can use prior knowledge to infer the identities of individuals in the video ...
Robert Kuschnig
Internet video streaming is a hot topic in multimedia systems. This thesis introduces a new approach to video streaming based on multiple request-response streams. The novelty of this system is that it is able to make use of multiple HTTP-based request-response streams while still providing TCP-friendliness. The results indicate that the streaming system can make ...
Kristian Evensen
One the few constants in the world of computer networking, is that users always want more bandwidth. The usage of bandwidth-intensive services, like video streaming, video conferencing and games, have exploded over the last couple of years. At the same time, devices capable of connecting to two or more different networks simultaneously, known as host ...
Apostolos Papageorgiou
At the crossroads of two hot trends of modern computer science, namely service-orientation and mobile computing, great potentials arise together with tough challenges. The list of advantages of combining these technologies is long and compelling: Outsourcing of data- and processing-intensive software tasks from mobile devices to more capable systems, quick mobile application development through the ...
Anita Sobe
In this thesis the non-sequential delivery of media in dynamic networks is investigated. Consider a scenario where people participate at a social event. With the increased popularity of smart phones and tablet computers people produce more and more multimedia content. They share their content and consume it on popular web platforms. The production and the ...
Dominik Kaspar
The explosive deployment of wired and wireless communication infrastructure has recently enabled many novel applications and sparked new research problems. One of the unsolved issues in today’s Internet – the main topic of this thesis – is the goal of increasing data transfer speeds of end hosts by aggregating and simultaneously using multiple network interfaces. ...
Mohammad Kazemi Varnamkhasti
Multiple distortion coding (MDC) is a promising solution for video transmission over lossy channels. In MDC, multiple descriptions of a source are generated which are dependently decodable and mutually refinable. When all descriptions are available, the corresponding quality is called central quality; otherwise it is called side quality. Generally, there exists a trade-off between side ...
Sree Hari Krishnan Parthasarathi
The work described in this thesis takes place in the context of capturing real-life audio for the analysis of spontaneous social interactions. Towards this goal, we wish to capture conversational and ambient sounds using portable audio recorders. Analysis of conversations can then proceed by modeling the speaker turns and durations produced by speaker diarization. However, ...
Mona Omidyeganeh
Video modeling and analysis have been of great interest in the video research community, due to their essential contribution to systematic improvements concerned in a wide range of video processing techniques. Parametric modeling and analysis of video provides appropriate means for processing the signal and the necessary mining of information for efficient representation of the ...
Xirong Li
In a world with increasing amounts of digital pictures, content-based visual search is an important and scientifically challenging problem in ICT research. This thesis tackles the problem by learning from social media. The fundamental question addressed in this thesis is: what is the value of socially tagged images for visual search? To that end, we propose the ...
