Ingo Kofler
This thesis investigates mechanisms and applications for in-network adaptation of scalable video bit streams based on the recent H.264/Scalable Video Coding (SVC) standard. In-network adaptation refers to the adaptation of a video stream by a network element during the stream’s transport through the network. The advantages of performing adaptation directly in the network are the ...
Frank Hopfgartner
A challenging problem in the user profiling domain is to create profiles of users of retrieval systems. This problem even exacerbates in the multimedia domain. Due to the Semantic Gap, the difference between low-level data representation of videos and the higher concepts users associate with videos, it is not trivial to understand the content of ...
Chunxi Liu
Nowdays, there are many ways for users to access video resource, and the number of videos grows rapidly. On the other hand, the user’s needs become more diversified and personalized. However, people’s capacities of using and managing video data have not increased with the growth of the video. The confliction between the user’s requirement and ...
Oliver Lampl
This thesis investigates how adaptive QoS-aware multimedia applications are developed and the required support from the programming language and the compiler as well as the run-time system. Multimedia applications have become an increasingly important part of our lives. Many frameworks such as JMF, DirectShow, FFmpeg, GStreamer can help in the development of such software. All of ...
Parag S. Mogre
Wireless Mesh Networks (WMNs) provide a novel network architecture to extend broadband network coverage with low costs. Additionally, we see an increased interest in supporting demanding multimedia applications in next-generation wireless mesh networks. Provision of Quality of Service (QoS) in wireless mesh networks requires end-to-end support for routing packets via a suitable multihop route to ...
Sonja Bergsträsser
The importance of virtual worlds is steadily growing both in general as well as from an economical perspective and they register increasing member counts. The virtual worlds observed in research most often nowadays are the very popular gaming worlds of Multiplayer Online Games (MOGs). They are among the most popular collaborative applications and are often ...
Matteo Varvello
A Networked Virtual Environment (NVE) is a synthetic world where human-controlled avatars can interact. Multiplayer on-line games such as Quake and World of Warcraft are the most popular applications for NVEs. In early 2003, Second Life (SL), a NVE where avatars can invent a new social life, was launched. The main innovative feature of SL ...
Cheng Wei
High-resolution 3D meshes are increasingly available in networked applications, such as digital museum, online game, and virtual reality. The amount of data constituting a high-resolution 3D mesh can be huge, leading to long downloading time. To reduce the waiting time of users, a common technique for remote viewing is progressive streaming, which allows a low-resolution ...
Zeljko Vrba
The appearance of commodity multi-core processors has spawned a wide interest in parallel programming, which is widely-regarded as more challenging than sequential programming. Existing distributed processing frameworks like MapReduce and Dryad are intentionally meant for large batch workloads and fail to efficiently support cyclic workloads with deadlines. In this respect, a Kahn Process Networks (KPN) ...
Cheng-Hsin Hsu
Modern mobile devices have evolved into small computers that can render multimedia streaming content anywhere and anytime. These devices can extend the viewing time of users and provide more business opportunities for service providers. Mobile devices, however, make a challenging platform for providing high-quality multimedia services. The goal of this thesis is to identify these ...
Andreas Petlund
A large number of network services use IP and reliable transport protocols. For applications with constant pressure of data, loss is handled satisfactorily, even if the application is latency sensitive. For applications with data streams consisting of intermittently sent small packets, however, users experience extreme latencies more frequently. Due to the fact that such thin-stream ...
Aleksandra Kovacevic
Personalization of Internet services is a significant feature and exploiting the users’ location brings the most value to it. Location-based services have a wide application range – from emergency, tracking, and navigation services to informational and entertainment services. In existing centrally managed solutions, the results of location-based search are often incomplete or outdated. Additional information ...
Sebastien Mondet
This thesis deals with the modeling and the interactive streaming of large natural 3D scenes. We aim at providing techniques to allow the remote walkthrough of users in a natural 3D scene ensuring botanical coherency and interactivity. First, we provide a compact and progressive representation for botanically realistic plant models. The topological structure and the geometry ...
Jens Brandt
The prominence of digital video on the Internet is rising constantly. Faster Internet connections and more powerful devices make video streaming over the Internet more and more popular. With mobile devices, however, the usability of digital videos that are streamed over a wireless network connection is still limited by the available resources. Mobile devices are ...
Eva Hörster
With the explosion of the number of images in personal and on-line collections, efficient techniques for navigating, indexing, labeling and searching images become more and more important. In this work we will rely on the image content as the main source of information to retrieve images. We study the representation of images by topic models ...
Dewan Tanvir Ahmed
Massively Multiplayer Online Games (MMOG), now supporting millions of simultaneous participants on a regular basis, have become a significant contributor in human-to-human communications. While originally designed for games, they have now moved into serious realms of socialization, business, commerce, scientific experimentation, and others. As more and more people participate in these massive environments, the underlying ...
Behnoosh Hariri
Massively Multiuser Virtual Environments (MMVE) are network applications that simulate the experience of real-time interaction among multiple users distributed all over the internet. In order to share the common sense of time and place, multiple entities interacting in the shared virtual environment must be aware of the modifications or interactions within the shared environment. This ...
William Conner
Internet-based multimedia applications (e.g., voice-over-IP, instant messaging, and video conferencing) are continuing to grow in importance as more people depend on such applications for personal and professional communications. Although performance is almost always a concern with multimedia systems that must satisfy quality-of-service (QoS) constraints, security is also a major requirement given the increasing criticality of ...
M. Shamim Hossain
The advent of service-oriented architecture (SOA), internet and ubiquitous delivery tech-nology has resulted in multimedia services (e.g. repurposing, streaming and conferencing services) being accessible at any time, from any device, through any network. However, there are still some problems related to heterogeneity, scalability and QoS demand of the management of such multimedia services. Some of ...
Arne Munch-Ellingsen
Pervasive systems, with their interconnected mesh of devices, have some similarities, but pervasive systems are mostly diverse and will certainly change over time. Within these pervasive systems, the applications come in many varieties (e.g: context aware, QoS aware, multimedia, realtime, games, discrete, ubiquitous and domain specific as in health care applications, tourist application, etc.). The ...