Ralf Steinmetz - Selected Publications#
1. Bastian Alt, Markus Weckesser, Christian Becker, Matthias Hollick, Sounak Kar, Anja Klein, Robin Klose, Roland Kluge, Heinz Koeppl, Boris Koldehofe, Wasiur R KhudaBukhsh, Manisha Luthra, Mahdi Mousavi, Max Mühlhäuser, Martin Pfannemüller, Amr Rizk, Andy Schürr, Ralf Steinmetz, Transitions: A Protocol-Independent View of the Future Internet, Proceedings of the IEEE, Feb 2019.
The Proceedings of the IEEE is the most highly-cited general interest journal in electrical engineering and computer science. To address the issues with mismatching between the novel communication system designs and their deployment, this paper presents formalizes the concept of Transitions, i.e., a method to instrumentalize adaptivity at runtime in communication systems. It allows to exchange communication mechanisms in a running system to optimize the communication quality.
2. Divyashri Bhat, Amr Rizk, Michael Zink, Ralf Steinmetz: SABR: Network-Assisted Content Distribution for QoE-Driven ABR Video Streaming. In: ACM Transactions on Multimedia Computing, Communications, and Applications (TOMM), 14(2s): 32:1--32:25, Oct 2018.
ACM TOMM/TOMCCAP is a top journal on multimedia technology. This paper presents SABR, a novel architecture that leverages the benefits of software-defined networking (SDN) to provide network-assisted adaptive bitrate streaming in WAN environments. With clients retaining full control of their streaming algorithms, the paper clearly show that by this network assistance, both the clients and the content providers benefit significantly in terms of quality of experience (QoE) and content origin offloading.
3. Christian Koch, Moritz Lode, Denny Stohr, Amr Rizk, Ralf Steinmetz: Collaborations on YouTube: From Unsupervised Detection to the Impact on Video and Channel Popularity. ACM TOMM 14(4): 89:1-89:23 (2018)
ACM TOMM/TOMCCAP is a top journal on multimedia technology. YouTube is the most popular platform for streaming of user-generated videos, however collaborations on YouTube have not been studied in a much quantitative manner. To close this gap, this paper designs a framework for collaboration detection using deep learning and shows its high efficiency via collected YouTube video dataset statistics of over 3 months for 7,942 channels.
4. Denny Stohr, Alexander Frömmgen, Amr Rizk, Michael Zink, Ralf Steinmetz, Wolfgang Effelsberg: Where are the Sweet Spots?: A Systematic Approach to Reproducible DASH Player Comparisons. ACM Multimedia 2017: 1113-1121
ACM Multimedia is a top conference on multimedia. The paper presents a firsts comprehensive study which shows there is substantial impact of player choice and configuration on the streaming performance (e.g., Quality of Experience). It demonstrates that an isolated analysis of DASH player modules is insufficient to capture the player streaming performance, and the choice of the target buffer size together with the player implementation dominates the choice of the adaptation algorithms.
5. Ralf Steinmetz: Synchronization Properties in Multimedia Systems; IEEE Journal on Selected Areas in Communication, Apr 1990, Vol. 8 (3), pp. 401-412
Received 756 citations according to Google Scholar
6. Ralf Steinmetz, Multimedia: computing communications & applications, Pearson Education India. 2012.
This book provides a complete and balanced view on the multimedia field covering three main domains related to multimedia: devices, systems and applications. It is one of best reading textbook on multimedia which received 878 citations according to Google Scholar.
7. Marek Meyer, Christoph Rensing, Ralf Steinmetz: Multigranularity reuse of learning resources. TOMCCAP 7(1): 1:1-1:23 (2011)
ACM TOMCCAP is a top journal on multimedia technology. This paper investigates the issue of learning resource reuse in which existing learning resources serve as preliminary products for the creation of new learning resources, further allowing authors to reuse learning resources and also parts of them at different levels of granularity in a modular way. The requirements of multigranularity reuse are analyzed and compared to existing solutions. A concept for modular, multigranularity reuse is presented in this article. It is also shown how this kind of reuse can be achieved in practise.
8. S Göbel, S Hardy, V Wendel, F Mehm, R Steinmetz, Serious games for health: personalized exergames, Proceedings of the 18th ACM international conference on Multimedia (Multimedia 2010), 1663-1666 (200 citations in Google Scholar)
ACM Multimedia is a top conference on multimedia. To address the issue of a lack of personalization and a lack of support for long-term motivation and the sustainable use of serious games in sports and health, this paper develops a set of personalized exergames which combine methods and concepts of serious games, adaptation and personalization, authoring and sensor technologies. Compared to existing systems, the set of games does not only keep track of the user’s vital state, but also directly integrates vital parameters into the gameplay and supports the training and motivation for sustainable physical activity in a playful manner.
9. Aleksandra Kovacevic, Oliver Heckmann, Nicolas C. Liebau, Ralf Steinmetz: Location Awareness - Improving Distributed Multimedia Communication. Proceedings of the IEEE 96(1): 131-142 (2008)
The Proceedings of the IEEE is the most highly-cited general interest journal in electrical engineering and computer science. Multimedia creation and consumption is highly intensive and makes up the majority of Internet traffic nowadays. This paper recognizes the performance and additional benefits of geographical location-awareness distributed multimedia communication, by developing an novel overlay structure for distributed multimedia systems (and alike), which is location-aware and uses the locations of its nodes to optimize node-to-node communication for performance and delay, while enabling location-based services.
10. R Berbner, M Spahn, N Repp, O Heckmann, R Steinmetz, Heuristics for QoS-aware web service composition, 2006 IEEE International Conference on Web Services (ICWS 2006), 72-82 (324 citations in Google Scholar)
ICWS is the premium conference on innovative web-based services. To tackle the optimization problem on how to select Web services for each task so that the overall QoS and cost requirements of the composition are satisfied, existing proposals use exact algorithms or complex heuristics (e.g. genetic algorithms). To actually implement a workflow engine, the algorithm needs to support real-time and under heavy load. This paper presents a novel heuristic approach and demonstrates its high efficiency and high accuracy compared to other approaches.
