@inproceedings {Simula.telco.2,
	title = {Quality-Adaptive Scheduling for Live Streaming Over Multiple Access Networks},
	journal = {The 20th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2010)},
	year = {2010},
	month = {June},
	pages = {21-26},
	publisher = {ACM},
	type = {Conference},
	abstract = {Video streaming ranks among the most popular services offered through the Internet today. At the same time, accessing the Internet over public WiFi and 3G networks has become part of our everyday lives. However, streaming video in wireless environments is often subject to frequent periods of rebuffering and characterized by low picture quality. In particular, achieving smooth and quality-adaptive streaming of live video poses a big challenge in mobile scenarios. Building on the observation that the subjective video experience on mobile devices decreases when quality changes are more frequent than every 1 to 2 seconds, we present a client-side scheduler that retrieves segments of several video encodings over heterogeneous network interfaces simultaneously. By extending the DAVVI streaming platform with support for multihoming, the proposed scheduler{\textquoteright}s performance is experimentally evaluated. The results show that our scheduler reduces the video interruptions and achieves a higher and more stable average quality over multiple, truly heterogeneous wireless interfaces.},
	isbn = {978-1-4503-0043-8},
	author = {Evensen, Kristian and Kupka, Tomas and Kaspar, Dominik and Halvorsen, P{\r a}l and Griwodz, Carsten},
	editor = {Dick C. A. {Bulterman}}
}
@inproceedings {Simula.mpg.8,
	title = {Randomised Pair Comparison - an Economic and Robust Method for Audiovisual Quality Assessment},
	journal = {The 20th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2010)},
	year = {2010},
	pages = {63-68},
	publisher = {ACM},
	type = {Workshop},
	abstract = {Subjective quality perception studies with human observers are essential for multimedia system design. Such studies are known to be expensive and difficult to administer. They re- quire time, a detailed knowledge of experimental designs and a level of control which can often only be achieved in a lab- oratory setting. Hence, only very few researchers consider running subjective studies at all. In this paper we present Randomised Pair Comparison (r/pc), an easy-to-use, flexible, economic and robust exten- sion to conventional pair comparison methods. r/pc uses random sampling to select a unique and small subset of pairs for each assessor, thus separating session duration from the experimental design. With r/pc an experimenter can freely define the duration of sessions and balance between costs and accuracy of an experiment. On a realistic example study we show that r/pc is able to create stable results with an accuracy close to full factorial designs, yet much lower costs. We also provide initial evi- dence that r/pc can avoid unpleasant fatigue and learning effects which are common in long experiment sessions.},
	isbn = {978-1-4503-0043-8},
	author = {Eichhorn, Alexander and Ni, Pengpeng and Eg, Ragnhild},
	editor = {Dick C. A. {Bulterman}}
}
@inproceedings {Simula.mpg.2,
	title = {Tips, Tricks and Troubles: Optimizing for Cell and GPU},
	journal = {The 20th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2010)},
	year = {2010},
	month = {June},
	pages = {75-80},
	publisher = {ACM},
	type = {Conference},
	abstract = {When used efficiently, modern multicore architectures, such as Cell and GPUs, provide the processing power required by resource demanding multimedia workloads. However, the diversity of resources exposed to the programmers, intrinsically requires specific mindsets for efficiently utilizing these resources - not only compared to an x86 architecture, but also between the Cell and the GPUs. In this context, our analysis of 14 different Motion-JPEG implementations indicates that there exists a large potential for optimizing performance, but there are also many pitfalls to avoid. By experimentally evaluating algorithmic choices, inter-core data communication (memory transfers) and architecture-specific capabilities, such as instruction sets, we present tips, tricks and troubles with respect to efficient utilization of the available resources.},
	isbn = {978-1-4503-0043-8},
	author = {H{\r a}kon Kvale {Stensland} and Espeland, H{\r a}vard and Griwodz, Carsten and Halvorsen, P{\r a}l},
	editor = {Dick C. A. {Bulterman}}
}
