@inproceedings {Simula.simula.802,
	title = {Flicker Effects in Adaptive Video Streaming to Handheld Devices},
	journal = {Proceedings of the ACM International Multimedia Conference (ACM MM)},
	year = {2011},
	month = {Nov/Dec},
	pages = {463-472},
	publisher = {ACM},
	type = {Conference},
	abstract = {Streaming video over the Internet requires mechanisms that limit the streams{\textquoteright} bandwidth consumption within its fair share. TCP streaming guarantees this and provides lossless streaming as a side-effect. Adaptation by packet drop does not occur in the network, and excessive startup latency and stalling must be prevented by adapting the bandwidth consumption of the video itself. However, when the adaptation is performed during an ongoing session, it may influence the perceived quality of the entire video and result in improved or reduced visual quality of experience. We have in- vestigated visual artifacts that are caused by adaptive layer switching - we call them flicker effects - and present our results for handheld devices in this paper. We considered three types of flicker, namely noise, blur and motion flicker. The perceptual impact of flicker is explored through subjective assessments. We vary both the intensity of quality changes (amplitude) and the number of quality changes per second (frequency). Users{\textquoteright} ability to detect and their acceptance of variations in the amplitudes and frequencies of the quality changes are explored across four content types. Our results indicate that multiple fac- tors influence the acceptance of different quality variations. Amplitude plays the dominant role in delivering satisfactory video quality, while frequency can also be adjusted to relieve the annoyance of flicker artifacts.},
	author = {Ni, Pengpeng and Eg, Ragnhild and Eichhorn, Alexander and Griwodz, Carsten and Halvorsen, P{\r a}l},
	editor = {Sundaram, Hari and Feng, Wu-chi and Sebe, Nicu}
}
@inproceedings {Simula.simula.748,
	title = {Processing of Multimedia Data Using the P2G Framework},
	journal = {Proceedings of the 19th ACM international conference on Multimedia},
	year = {2011},
	pages = {819-820},
	publisher = {ACM},
	type = {Conference},
	abstract = {In this demo, we present the P2G framework designed for processing distributed real-time multimedia data. P2G supports arbitrarily complex dependency graphs with cycles, branches and deadlines. P2G is implemented to scale transparently with available resources, i.e., a concept familiar from the cloud computing paradigm. Additionally, P2G supports heterogeneous computing resources, such as x86 and GPU processing cores. We have implemented an interchangeable P2G kernel language which is meant to expose fundamental concepts of the P2G programming model and ease the application development. Here, we demonstrate the P2G execution node using a MJPEG encoder as an example workload when dynamically adding and removing processing cores.},
	isbn = {978-1-4503-0616-4},
	author = {Beskow, Paul and H{\r a}kon Kvale {Stensland} and Espeland, H{\r a}vard and Espen Angell {Kristiansen} and Preben N. {Olsen} and St{\r a}le B. {Kristoffersen} and Griwodz, Carsten and Halvorsen, P{\r a}l},
	editor = {Sundaram, Hari and Feng, Wu-chi and Sebe, Nicu}
}
@inproceedings {Simula.mpg.20,
	title = {Low Overhead Container Format for Adaptive Streaming},
	journal = {Proceedings of the ACM Multimedia Systems (MMSys)},
	year = {2010},
	month = {February},
	pages = {193-198},
	publisher = {ACM},
	type = {Conference},
	abstract = {Current segmented HTTP streaming systems provide scal- able and quality adaptive video delivery services to a huge number of users. However, while they support a wide range of bandwidths and enable arbitrary content-based composition, their current formats have shortcomings like large overheads, live streaming delays, etc. We have therefore de- veloped an adaptive media player that works around these problems while still using standard components like H.264/AVC for video, and MP3 for audio. The system\&$\#$39;s adaptivity allows the player to pick a quality level that makes good use of available bandwidth and CPU resources while at the same time maintaining smooth uninterrupted playback, as well as offering near instant seek and startup times. This paper presents an appropriate way of coding the seg- ments and a simple multimedia container format that is optimized for adaptive streaming and video composition over HTTP. We show that our format is sufficiently advanced to contain any payload type, while being trivial to parse and translate to other container formats. Additionally, we show that our format is second to none in terms of overhead, without incurring any penalties on live streaming.},
	isbn = {978-1-60558-914-5},
	author = {Riiser, Haakon and Halvorsen, P{\r a}l and Griwodz, Carsten and Johansen, Dag},
	editor = {Mayer-Patel, Ketan and Feng, Wu-chi}
}
@inproceedings {Sem-jacobsen.2006.1,
	title = {Dynamic Fault Tolerance With Misrouting in Fat Trees},
	journal = {Proceedings of the International Conference on Parallel Processing (ICPP)},
	year = {2006},
	month = {August},
	pages = {33-45},
	publisher = {IEEE Computer Society},
	type = {Conference},
	abstract = {Fault tolerance is critical for efficient utilisation of large computer systems. Dynamic fault tolerance allows the network to remain available through the occurance of faults as opposed to static fault tolerance which requires the network to be halted to reconfigure it. Although dynamic fault tolerance may lead to less efficient solutions than static fault tolerance, it allows for a much higher availability of the system. In this paper we devise a dynamic fault tolerant adaptive routing algorithm for the fat tree, a much used interconnect topology, which relies on misrouting around link faults. We show that we are guaranteed to tolerate any combination of less than (num\_switch\_ports/2) link faults without the need for additional network resources for deadlock freedom. There is also a high probability of tolerating an even larger number of link faults. Simulation results show that network performance degrades very little when faults are dynamically tolerated.},
	isbn = {22},
	author = {Frank Olaf {Sem-Jacobsen} and Skeie, Tor and Lysne, Olav and Duato, Jose},
	editor = {Feng, Wu-chi}
}
@inproceedings {griwodz-zink-2000,
	title = {Multicast for Savings in Cache-Based Video Distribution},
	journal = {Proceedings of SPIE/ACM Conference on Multimedia Computing and Networking (MMCN)},
	volume = {3969},
	number = {26},
	year = {2000},
	note = {(San Jose, CA, USA)},
	month = {dec},
	pages = {26-35},
	publisher = {SPIE},
	type = {Annual},
	abstract = {Internet video-on-demand (VoD) today streams videos directly from server to clients, because re-distribution is not established yet. Intranet solutions exist but are typically managed centrally. Caching may overcome these management needs, however existing web caching strategies are not applicable because they work in different conditions. We propose movie distribution by means of caching, and study the feasibility from the service providers{\textquoteright} point of view. We introduce the combination of our reliable multicast protocol LCRTP for caching hierarchies combined with our enhancement to the patching technique for bandwidth friendly True VoD, not depending on network resource guarantees.},
	isbn = {0-8194-3587-2},
	doi = {10.1117/12.373532},
	author = {Griwodz, Carsten and Zink, Michael and Liepert, Michael and On, Giwon and Steinmetz, Ralf},
	editor = {Nahrstedt, Klara and Feng, Wu-chi}
}
