Research

Please find below a list of our publications related to DASH.

  • [DOI] A. Zabrovskiy, C. Feldmann, and C. Timmerer, “Multi-codec dash dataset,” in Mmsys ’18 proceedings of the 9th acm multimedia systems conference, New York (NY), 2018, p. 438–443.
    [Bibtex]
    @InProceedings{Zabrovskiy2018,
    title = {Multi-codec DASH dataset},
    author = {Zabrovskiy, Anatoliy and Feldmann, Christian and Timmerer, Christian},
    booktitle = {MMSys '18 Proceedings of the 9th ACM Multimedia Systems Conference},
    year = {2018},
    address = {New York (NY)},
    month = {Juni},
    pages = {438--443},
    publisher = {ACM Press},
    abstract = {The number of bandwidth-hungry applications and services is constantly growing. HTTP adaptive streaming of audio-visual content accounts for the majority of today's internet traffic. Although the internet bandwidth increases also constantly, audio-visual compression technology is inevitable and we are currently facing the challenge to be confronted with multiple video codecs.This paper proposes a multi-codec DASH dataset comprising AVC, HEVC, VP9, and AV1 in order to enable interoperability testing and streaming experiments for the efficient usage of these codecs under various conditions. We adopt state of the art encoding and packaging options and also provide basic quality metrics along with the DASH segments. Additionally, we briefly introduce a multi-codec DASH scheme and possible usage scenarios. Finally, we provide a preliminary evaluation of the encoding efficiency in the context of HTTP adaptive streaming services and applications.},
    doi = {10.1145/3204949.3208140},
    url = {https://dl.acm.org/citation.cfm?id=3208140}
    }
  • [DOI] B. Rainer, S. Petscharnig, and C. Timmerer, “Merge and Forward: A Self-Organized Inter-Destination Media Synchronization Scheme for Adaptive Media Streaming over HTTP,” in Mediasync, Berlin, 2018, p. 593–627.
    [Bibtex]
    @InProceedings{Rainer2018,
    author = {Rainer, Benjamin and Petscharnig, Stefan and Timmerer, Christian},
    title = {{Merge and Forward: A Self-Organized Inter-Destination Media Synchronization Scheme for Adaptive Media Streaming over HTTP}},
    booktitle = {MediaSync},
    year = {2018},
    pages = {593--627},
    address = {Berlin},
    month = {März},
    publisher = {Springer},
    abstract = {In this chapter, we present Merge and Forward, an IDMS scheme for adaptive HTTP streaming as a distributed control scheme and adopting the MPEG-DASH standard as representation format. We introduce so-called IDMS sessions and describe how an unstructured peer-to-peer overlay can be created using the session information using MPEG-DASH. We objectively assess the performance of Merge and Forward with respect to convergence time (time needed until all clients hold the same reference time stamp) and scalability. After the negotiation on a reference time stamp, the clients have to synchronize their multimedia playback to the agreed reference time stamp. In order to achieve this, we propose a new adaptive media playout approach minimizing the impact of playback synchronization on the QoE. The proposed adaptive media playout is assessed subjectively using crowd sourcing. We further propose a crowd sourcing methodology for conducting subjective quality assessments in the field of IDMS by utilizing GWAP. We validate the applicability of our methodology by investigating the lower asynchronism threshold for IDMS in scenarios like online quiz games.},
    doi = {10.1007/978-3-319-65840-7_21},
    url = {https://link.springer.com/chapter/10.1007/978-3-319-65840-7_21}
    }
  • [DOI] M. Hosseini and C. Timmerer, “Dynamic adaptive point cloud streaming,” in Pv ’18 proceedings of the 23rd packet video workshop, New York (NY), 2018, p. 25–30.
    [Bibtex]
    @InProceedings{Hosseini2018,
    title = {Dynamic Adaptive Point Cloud Streaming},
    author = {Hosseini, Mohammad and Timmerer, Christian},
    booktitle = {PV '18 Proceedings of the 23rd Packet Video Workshop},
    year = {2018},
    address = {New York (NY)},
    month = {Juni},
    pages = {25--30},
    publisher = {ACM Press},
    abstract = {High-quality point clouds have recently gained interest as an emerging form of representing immersive 3D graphics. Unfortunately, these 3D media are bulky and severely bandwidth intensive, which makes it difficult for streaming to resource-limited and mobile devices. This has called researchers to propose efficient and adaptive approaches for streaming of high-quality point clouds.In this paper, we run a pilot study towards dynamic adaptive point cloud streaming, and extend the concept of dynamic adaptive streaming over HTTP (DASH) towards DASH-PC, a dynamic adaptive bandwidth-efficient and view-aware point cloud streaming system. DASH-PC can tackle the huge bandwidth demands of dense point cloud streaming while at the same time can semantically link to human visual acuity to maintain high visual quality when needed. In order to describe the various quality representations, we propose multiple thinning approaches to spatially sub-sample point clouds in the 3D space, and design a DASH Media Presentation Description manifest speci.c for point cloud streaming. Our initial evaluations show that we can achieve signi.cant bandwidth and performance improvement on dense point cloud streaming with minor negative quality impacts compared to the baseline scenario when no adaptations is applied.},
    doi = {10.1145/3210424.3210429},
    url = {https://dl.acm.org/citation.cfm?id=3210429}
    }
  • [PDF] [DOI] A. Zabrovskiy, E. Kuzmin, E. Petrov, C. Timmerer, and C. Mueller, “Advise: adaptive video streaming evaluation framework for the automated testing of media players,” in Proceedings of the 8th acm on multimedia systems conference (mmsys’17), New York, NY, USA, 2017, p. 4.
    [Bibtex]
    @InProceedings{Zabrovskiy2017,
    title = {AdViSE: Adaptive Video Streaming Evaluation Framework for the Automated Testing of Media Players},
    author = {Zabrovskiy, Anatoliy and Kuzmin, Evgeny and Petrov, Evgeny and Timmerer, Christian and Mueller, Christopher},
    booktitle = {Proceedings of the 8th ACM on Multimedia Systems Conference (MMSys'17)},
    year = {2017},
    address = {New York, NY, USA},
    editor = {Chen, Kuan-Ta},
    month = {jun},
    pages = {4},
    publisher = {ACM},
    abstract = {Today we can observe a plethora of adaptive video stream- ing services and media players which support interoperable formats like DASH and HLS. Most of the players and their rate adaptation algorithms work as a black box. We have de- veloped a system for easy and rapid testing of media players under various network scenarios. In this paper, we introduce AdViSE, the Adaptive Video Streaming Evaluation frame- work for the automated testing of adaptive media players. The presented framework is used for the comparison and testing of media players in the context of adaptive video streaming over HTTP in web/HTML5 environments.
    The demonstration showcases a series of experiments with different media players under given context conditions (e.g., network shaping, delivery format). We will also demonstrate the real-time capabilities of the framework and offline anal- ysis including several QoE metrics with respect to a newly introduced bandwidth index.},
    doi = {10.1145/3083187.3083221},
    isbn10 = {978-1-4503-5002-0},
    language = {EN},
    location = {Taipei, Taiwan},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/Demo_Paper_Camera_Ready.pdf},
    talkdate = {2017.06.21},
    talktype = {poster}
    }
  • [DOI] B. Rainer, S. Petscharnig, C. Timmerer, and H. Hellwagner, “Statistically indifferent quality variation: an approach for reducing multimedia distribution cost for adaptive video streaming services,” Ieee transactions on multimedia, vol. 19, p. 13, 2017.
    [Bibtex]
    @Article{Rainer2017a,
    title = {Statistically Indifferent Quality Variation: An Approach for Reducing Multimedia Distribution Cost for Adaptive Video Streaming Services},
    author = {Rainer, Benjamin and Petscharnig, Stefan and Timmerer, Christian and Hellwagner, Hermann},
    journal = {IEEE Transactions on Multimedia},
    year = {2017},
    month = {mar},
    pages = {13},
    volume = {19},
    abstract = {Forecasts predict that Internet traffic will continue to grow in the near future. A huge share of this traffic is caused by multimedia streaming. The Quality of Experience (QoE) of such streaming services is an important aspect and in most cases the goal is to maximize the bit rate which -- in some cases -- conflicts with the requirements of both consumers and providers. For example, in mobile environments users may prefer a lower bit rate to come along with their data plan. Likewise, providers aim at minimizing bandwidth usage in order to reduce costs by transmitting less data to users while maintaining a high QoE.
    Today's adaptive video streaming services try to serve users with the highest bit rates which consequently results in high QoE. In practice, however, some of these high bit rate representations may not differ significantly in terms of perceived video quality compared to lower bit rate representations.
    In this paper, we present a novel approach to determine the statistically indifferent quality variation (SIQV) of adjacent video representations for adaptive video streaming services by adopting standard objective quality metrics and existing QoE models. In particular, whenever the quality variation between adjacent representations is imperceptible from a statistical point of view, the representation with higher bit rate can be substituted with a lower bit rate representation. As expected, this approach results in savings with respect to bandwidth consumption while still providing a high QoE for users. The approach is evaluated subjectively with a crowdsourcing study. Additionally, we highlight the benefits of our approach, by providing a case study that extrapolates possible savings for providers.},
    address = {New York, USA},
    doi = {10.1109/TMM.2016.2629761},
    keywords = {Adaptive Video Streaming, Quality of Experience, MPEG-DASH},
    language = {EN},
    publisher = {IEEE},
    url = {http://ieeexplore.ieee.org/document/7745907/}
    }
  • [PDF] M. Graf, C. Timmerer, and C. Mueller, “Towards bandwidth efficient adaptive streaming of omnidirectional video over http: design, implementation, and evaluation,” in Proceedings of the 8th acm on multimedia systems conference (mmsys’17), New York, NY, USA, 2017, p. 11.
    [Bibtex]
    @InProceedings{Graf2017,
    title = {Towards Bandwidth Efficient Adaptive Streaming of Omnidirectional Video over HTTP: Design, Implementation, and Evaluation},
    author = {Graf, Mario and Timmerer, Christian and Mueller, Christopher},
    booktitle = {Proceedings of the 8th ACM on Multimedia Systems Conference (MMSys'17)},
    year = {2017},
    address = {New York, NY, USA},
    editor = {Chen, Kuan-Ta},
    month = {jun},
    pages = {11},
    publisher = {ACM},
    abstract = {Real-time entertainment services such as streaming audio- visual content deployed over the open, unmanaged Internet account now for more than 70% during peak periods. More and more such bandwidth hungry applications and services are proposed like immersive media services such as virtual reality and, specifically omnidirectional/360-degree videos. The adaptive streaming of omnidirectional video over HTTP imposes an important challenge on today’s video delivery infrastructures which calls for dedicated, thoroughly designed techniques for content generation, delivery, and consumption.
    This paper describes the usage of tiles — as specified within modern video codecs such HEVC/H.265 and VP9 — enabling bandwidth efficient adaptive streaming of omnidirectional video over HTTP and we define various streaming strategies. Therefore, the parameters and characteristics of a dataset for omnidirectional video are proposed and exemplary instanti- ated to evaluate various aspects of such an ecosystem, namely bitrate overhead, bandwidth requirements, and quality as- pects in terms of viewport PSNR. The results indicate bitrate savings from 40% (in a realistic scenario with recorded head movements from real users) up to 65% (in an ideal scenario with a centered/fixed viewport) and serve as a baseline and guidelines for advanced techniques including the outline of a research roadmap for the near future.},
    language = {EN},
    location = {Taipei, Taiwan},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/Special_Session_Camera_Ready.pdf},
    talkdate = {2016.06.20},
    talktype = {registered}
    }
  • [PDF] [DOI] B. Rainer, D. Posch, and H. Hellwagner, “Investigating the performance of pull-based dynamic adaptive streaming in ndn,” Journal on selected areas in communications, vol. 34, iss. 8, p. 11, 2016.
    [Bibtex]
    @Article{Rainer2016,
    title = {Investigating the Performance of Pull-based Dynamic Adaptive Streaming in NDN},
    author = {Rainer, Benjamin and Posch, Daniel and Hellwagner, Hermann},
    journal = {Journal on Selected Areas in Communications},
    year = {2016},
    month = {aug},
    number = {8},
    pages = {11},
    volume = {34},
    abstract = {Adaptive content delivery is the state-of-the-art in real-time multimedia streaming. Leading streaming approaches, e.g., MPEG-DASH and Apple HLS, have been developed for classical IP-based networks, providing effective streaming by means of pure client-based control and adaptation. However, the research activities of the Future Internet community adopt a new course that is different from today's host-based communication model. So-called Information-Centric Networks are of considerable interest and are advertised as enablers for intelligent networks, where effective content delivery is to be provided as an inherent network feature. This paper investigates the performance gap between pure client-driven adaptation and the theoretical optimum in the promising Future Internet architecture Named Data Networking (NDN). The theoretical optimum is derived by modeling multimedia streaming in NDN as a fractional Multi-Commodity Flow Problem and by extending it taking caching into account. We investigate the multimedia streaming performance under different forwarding strategies, exposing the interplay of forwarding strategies and adaptation mechanisms. Furthermore, we examine the influence of network inherent caching on the streaming performance by varying the caching polices and the cache sizes.},
    address = {New York, USA},
    doi = {10.1109/JSAC.2016.2577365},
    issn = {1558-0008},
    keywords = {Information-Centric Networking; Named Data Networking; Multimedia; Dynamic Adaptive Streaming.},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/jsac.pdf},
    publisher = {IEEE}
    }
  • C. Kreuzberger, B. Rainer, H. Hellwagner, L. Toni, and P. Frossard, “A comparative study of dash representation sets using real user characteristics,” in Proceedings of the 26th international workshop on network and operating systems support for digital audio and video, New York, NY, USA, 2016, p. 4:1–4:6.
    [Bibtex]
    @InProceedings{Kreuzberger2016a,
    title = {A Comparative Study of DASH Representation Sets Using Real User Characteristics},
    author = {Kreuzberger, Christian and Rainer, Benjamin and Hellwagner, Hermann and Toni, Laura and Frossard, Pascal},
    booktitle = {Proceedings of the 26th International Workshop on Network and Operating Systems Support for Digital Audio and Video},
    year = {2016},
    address = {New York, NY, USA},
    editor = {ACM,},
    month = {may},
    pages = {4:1--4:6},
    publisher = {ACM},
    isbn10 = {978-1-4503-4356-5},
    language = {EN},
    location = {Klagenfurt, Austria},
    talkdate = {2016.05.13},
    talktype = {registered}
    }
  • [PDF] C. Timmerer, D. Weinberger, M. Smole, R. Grandl, C. Mueller, and S. Lederer, “Live transcoding and streaming-as-a-service with mpeg-dash,” in 2015 ieee international conference on multimedia & expo workshops (icmew), Los Alamitos, CA, 2015, pp. 1-4.
    [Bibtex]
    @InProceedings{Timmerer2015_ICME,
    title = {Live Transcoding and Streaming-as-a-Service with MPEG-DASH},
    author = {Timmerer, Christian and Weinberger, Daniel and Smole, Martin and Grandl, Reinhard and Mueller, Christopher and Lederer, Stefan},
    booktitle = {2015 IEEE International Conference on Multimedia \& Expo Workshops (ICMEW)},
    year = {2015},
    address = {Los Alamitos, CA},
    editor = {Magli, Enrico and Tubaro, Stefano and Vetro, Anthony},
    month = {jun},
    pages = {1-4},
    publisher = {IEEE},
    abstract = {Multimedia content delivery and real-time streaming over the top of the existing infrastructure is nowadays part and parcel of every media ecosystem thanks to open standards and the adoption of the Hypertext Transfer Protocol (HTTP) as its primary mean for transportation. Hardware encoder manufacturers have adopted their product lines to support the dynamic adaptive streaming over HTTP but suffer from the inflexibility to provide scalability on demand, specifically for event-based live services that are only offered for a limited period of time. The cloud computing paradigm allows for this kind of flexibility and provide the necessary elasticity in order to easily scale with the demand required for such use case scenarios. In this paper we describe bitcodin, our transcoding and streaming-as-as-ervice platform based on open standards (i.e., MPEG-DASH) which is deployed on standard cloud and content delivery infrastructures to enable high-quality streaming to heterogeneous clients. It is currently deployed for video on demand, 24/7 live, and event-based live services using bitdash, our adaptive client framework.},
    language = {EN},
    location = {Torino, Italy},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/icme2015-bitmovin_camera-ready.pdf},
    talkdate = {2015.06.30},
    talktype = {poster}
    }
  • [PDF] C. Timmerer, D. Weinberger, M. Smole, R. Grandl, C. Mueller, and S. Lederer, “Cloud-based transcoding and adaptive video streaming-as-a-service,” Ieee multimedia communications technical committee e-letter, p. 7–11, 2015.
    [Bibtex]
    @Article{Timmerer2015_ELetterNov,
    title = {Cloud-based Transcoding and Adaptive Video Streaming-as-a-Service},
    author = {Timmerer, Christian and Weinberger, Daniel and Smole, Martin and Grandl, Reinhard and Mueller, Christopher and Lederer, Stefan},
    journal = {IEEE Multimedia Communications Technical Committee E-Letter},
    year = {2015},
    month = {nov},
    pages = {7--11},
    address = {New York, NY, USA},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/MMTC_bitcodin+bitdash.pdf},
    publisher = {IEEE Communications Society [online]}
    }
  • [PDF] C. Timmerer, M. Maiero, B. Rainer, S. Petscharnig, D. Weinberger, C. Mueller, and S. Lederer, “Quality of experience of adaptive http streaming in real-world environments,” Ieee multimedia communications technical committee e-letter, pp. 6-9, 2015.
    [Bibtex]
    @Article{Timmerer2015_ELetter,
    title = {Quality of Experience of Adaptive HTTP Streaming in Real-World Environments},
    author = {Timmerer, Christian and Maiero, Matteo and Rainer, Benjamin and Petscharnig, Stefan and Weinberger, Daniel and Mueller, Christopher and Lederer, Stefan},
    journal = {IEEE Multimedia Communications Technical Committee E-Letter},
    year = {2015},
    month = {may},
    pages = {6-9},
    address = {New York, NY, USA},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/QoE-DASH.pdf},
    publisher = {IEEE Communications Society [online]},
    talktype = {registered}
    }
  • [PDF] [DOI] C. Kreuzberger, D. Posch, and H. Hellwagner, “A scalable video coding dataset and toolchain for dynamic adaptive streaming over http,” in Proceedings of the 6th acm multimedia systems conference, New York, NY, USA, 2015, p. 213–218.
    [Bibtex]
    @InProceedings{Kreuzberger2015a,
    title = {A Scalable Video Coding Dataset and Toolchain for Dynamic Adaptive Streaming over HTTP},
    author = {Kreuzberger, Christian and Posch, Daniel and Hellwagner, Hermann},
    booktitle = {Proceedings of the 6th ACM Multimedia Systems Conference},
    year = {2015},
    address = {New York, NY, USA},
    editor = {Wei, Tsang Ooi},
    month = {mar},
    pages = {213--218},
    publisher = {ACM},
    series = {MMSys '15},
    abstract = {With video streaming becoming more and more popular, the number of devices that are capable of streaming videos over the Internet is growing. This leads to a heterogeneous device landscape with varying demands. Dynamic Adaptive Streaming over HTTP (DASH) offers an elegant solution to these demands. Smart adaptation logics are able to adjust the clients' streaming quality according to several (local) parameters. Recent research indicated benefits of blending Scalable Video Coding (SVC) with DASH, especially considering Future Internet architectures. However, except for a DASH dataset with a single SVC encoded video, no other datasets are publicly available. The contribution of this paper is two-fold. First, a DASH/SVC dataset, containing multiple videos at varying bitrates and spatial resolutions including 1080p, is presented. Second, a toolchain for multiplexing SVC encoded videos is provided, therefore making our results reproducible and allowing researchers to generate their own datasets.},
    doi = {10.1145/2713168.2713193},
    isbn13 = {978-1-4503-3351-1},
    keywords = {DASH; Dataset; Toolchain; Scalable Video Coding},
    language = {EN},
    location = {Portland, Oregon},
    pdf = {https://www-itec.uni-klu.ac.at/bib/files/dash_svc_dataset_v1.05.pdf},
    talkdate = {2015.03.18},
    talktype = {registered},
    url = {http://concert.itec.aau.at/SVCDataset/}
    }
  • [PDF] C. Timmerer, C. Griwodz, A. C. Begen, T. Stockhammer, and B. Girod, “Guest editorial: adaptive media streaming,” Ieee journal on selected areas in communications, vol. 32, iss. 4, pp. 681-683, 2014.
    [Bibtex]
    @Article{timmerer2014_jsac,
    title = {Guest Editorial: Adaptive Media Streaming},
    author = {Timmerer, Christian and Griwodz, Carsten and Begen, Ali Cengiz and Stockhammer, Thomas and Girod, Bernd},
    journal = {IEEE Journal on Selected Areas in Communications},
    year = {2014},
    month = {apr},
    number = {4},
    pages = {681-683},
    volume = {32},
    address = {New York, NY, USA},
    keywords = {Adaptive Media Streaming, DASH},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/06774588.pdf},
    publisher = {IEEE Communications Society}
    }
  • [PDF] C. Timmerer and B. Rainer, “The social multimedia experience,” Ieee computer, vol. 47, iss. 3, pp. 67-69, 2014.
    [Bibtex]
    @Article{timmerer2014_computer,
    title = {The Social Multimedia Experience},
    author = {Timmerer, Christian and Rainer, Benjamin},
    journal = {IEEE Computer},
    year = {2014},
    month = {mar},
    number = {3},
    pages = {67-69},
    volume = {47},
    abstract = {Inter-destination multimedia synchronization and quality of experience are critical to the success of social TV, which integrates television viewing with social networking.},
    address = {Los Alamitos, CA, USA},
    issn = {0018-9162},
    keywords = {Quality of Experience, Inter-Destination Media Synchronization, Social TV, DASH, IDMS, QoE},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/timmerer-sme-mar13.pdf},
    publisher = {IEEE Computer Society}
    }
  • [PDF] [DOI] C. Timmerer and A. C. Begen, “Over the top content delivery: state of the art and challenges ahead,” in Proceedings of the 2014 acm multimedia conference, New York, NY, USA, 2014, p. 1231–1232.
    [Bibtex]
    @InProceedings{TimmererBegen2014,
    title = {Over the Top Content Delivery: State of the Art and Challenges Ahead},
    author = {Timmerer, Christian and Begen, Ali Cengiz},
    booktitle = {Proceedings of the 2014 ACM Multimedia Conference},
    year = {2014},
    address = {New York, NY, USA},
    editor = {Hua, Kien and Rui, Yong and Steinmetz, Ralf and Hanjalic, Alan and Natsev, Apostol and Zhu, Wenwu},
    month = {nov},
    pages = {1231--1232},
    publisher = {ACM},
    abstract = {In this tutorial we present state of the art and challenges ahead in over-the-top content delivery. It particular, the goal of this tutorial is to provide an overview of adaptive media delivery, specifically in the context of HTTP adaptive streaming (HAS) including the recently ratified MPEG-DASH standard. The main focus of the tutorial will be on the common problems in HAS deployments such as client design, QoE optimization, multi-screen and hybrid delivery scenarios, and synchronization issues. For each problem, we will examine proposed solutions along with their pros and cons. In the last part of the tutorial, we will look into the open issues and review the work-in-progress and future research directions.},
    doi = {10.1145/2647868.2654849},
    isbn13 = {978-1-4503-3063-3},
    keywords = {adaptive media streaming, dynamic adaptive streaming over HTTP, MPEG-DASH, over-the-top video video},
    language = {EN},
    location = {Orlando, FL, USA},
    pdf = {https://www-itec.uni-klu.ac.at/bib/files/tut02-timmerer.pdf},
    slides = {https://www-itec.uni-klu.ac.at/bib/files/ACM_MM_Tutorial_11_2014.pdf},
    talkdate = {2014.11.03},
    talktype = {registered}
    }
  • [PDF] C. Timmerer, C. Mueller, and S. Lederer, “Adaptive media streaming over emerging protocols,” in 2014 nab broadcast engineering conference proceedings & cd, Washington DC, USA, 2014, p. 4.
    [Bibtex]
    @InProceedings{Timmerer2014,
    title = {Adaptive Media Streaming over Emerging Protocols},
    author = {Timmerer, Christian and Mueller, Christopher and Lederer, Stefan},
    booktitle = {2014 NAB Broadcast Engineering Conference Proceedings \& CD},
    year = {2014},
    address = {Washington DC, USA},
    editor = {available, not},
    month = {apr},
    pages = {4},
    publisher = {National Association of Broadcasters (NAB)},
    abstract = {The emerging MPEG standard Dynamic Adaptive Streaming over HTTP (MPEG-DASH) is designed for media delivery over the top of existing infrastructures and enables smooth multimedia streaming towards heterogeneous devices including both wired and wireless environments. The MPEG-DASH standard was designed to work with HTTP-URLs but mandates neither the actual version nor which underlying protocols to be used. This paper will provide a detailed introduction into emerging protocols (HTTP/2.0 and beyond) to be used in the context of adaptive media streaming, specifically DASH.},
    language = {EN},
    location = {Las Vegas, NV, USA},
    pdf = {https://www-itec.uni-klu.ac.at/bib/files/TimmererC012314_revised.pdf},
    slides = {https://www-itec.uni-klu.ac.at/bib/files/NAB2014-BEC.pdf},
    talkdate = {2014.04.07},
    talktype = {registered}
    }
  • [PDF] M. Klusch, P. Kapahnke, X. Cao, B. Rainer, C. Timmerer, and S. Mangold, “Mymedia: mobile semantic peer-to-peer video search and live streaming,” in Proceedings of the 11th international conference on mobile and ubiquitous systems: computing, networking and services, New York, NY, USA, 2014, p. 10.
    [Bibtex]
    @InProceedings{Rainer2014_Mobiquituous,
    title = {MyMedia: Mobile Semantic Peer-to-Peer Video Search and Live Streaming},
    author = {Klusch, Matthais and Kapahnke, Patrick and Cao, Xiaoqi and Rainer, Benjamin and Timmerer, Christian and Mangold, Stefan},
    booktitle = {Proceedings of the 11th International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services},
    year = {2014},
    address = {New York, NY, USA},
    editor = {Youssef, Moustafa},
    month = {dec},
    pages = {10},
    publisher = {ACM},
    abstract = {Mobile peer-to-peer (P2P) computing with applications such as for video on demand, file sharing, and video conferencing is gaining momentum based on new standards and technologies such as IETF PPSP, WiFi-Direct and BitTorrent live streaming. In this paper, we describe the mobile system MyMedia, that allows users to search, share and experience videos and live recordings using P2P and at the best quality possible with respect to available network capacity. In particular, the MyMedia system features a high-precision semantic P2P search and dynamic network-adaptive P2P live streaming of MPEG videos over HTTP based on the ISO/IEC standard MPEG-DASH from mobile to mobile devices in unstructured wireless P2P networks. These features have been integrated in the mobile application TIFF EventLive of the 54th Thessaloniki international film festival. The evaluation of their performance and device energy consumption, and a first user evaluation at the festival showed that the MyMedia system is suitable and accepted by users for its purpose in practice. The MyMedia system is available as open-source software for the Android operating system.},
    isbn13 = {-},
    language = {EN},
    location = {London, Great Britain},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/mobi_mymedia_paper.pdf},
    talkdate = {2014.12.05},
    talktype = {registered},
    url = {http://mobiquitous.org/2014}
    }
  • [PDF] B. Rainer and C. Timmerer, “Self-organized inter-destination multimedia synchronization for adaptive media streaming,” in Proceedings of the 22st acm international conference on multimedia, New York, NY, USA, 2014, p. 10.
    [Bibtex]
    @InProceedings{Rainer2014_ACM_MM_SELFORG,
    title = {Self-Organized Inter-Destination Multimedia Synchronization For Adaptive Media Streaming},
    author = {Rainer, Benjamin and Timmerer, Christian},
    booktitle = {Proceedings of the 22st ACM International Conference on Multimedia},
    year = {2014},
    address = {New York, NY, USA},
    editor = {ACM,},
    month = {nov},
    pages = {10},
    publisher = {ACM},
    abstract = {Social networks have become pervasive and have changed the way of social interaction. The traditional TV experience drifts from an event tied to a certain place with the family or friends to a location-independent and distributed social experience. Additionally, more and more video on-demand services adopt a pull-based streaming approach. In order to provide a synchronized and distributed TV experience we introduce a self-organized Inter-Destination Multimedia Synchronization (IDMS) framework for adaptive media streaming. In particular, we extend the principles of IDMS to adaptive media streaming over HTTP (i.e., MPEG-DASH) and enable a synchronized multimedia playback among geographically distributed clients. Therefore, we introduce session management to MPEG-DASH and for negotiating on a reference playback timestamp among the participating peers in an IDMS session we propose a distributed control scheme. We evaluate our proposed scheme with respect to scalability and time required for negotiating on the reference playback timestamp. Furthermore, we investigate how to compensate the identified asynchronism by using adaptive media playout with respect to the Quality of Experience (QoE). Therefore, we define a temporal distortion measure for audio and video which allows us to model the impact of playback rate variations on the QoE. This measure is evaluated by conducting a subjective quality assessment using crowdsourcing.},
    isbn13 = {-},
    keywords = {Inter-Destination Multimedia Synchronization, Adaptive Media Streaming, Self-Organization, Quality of Experience, Dynamic Adaptive Streaming over HTTP},
    language = {EN},
    location = {Orlando, Florida},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/acmm14.pdf},
    talkdate = {2014.11.03},
    talktype = {registered},
    url = {http://acmmm.org/2014/}
    }
  • [PDF] B. Rainer and C. Timmerer, “Quality of experience of web-based adaptive http streaming clients in real-world environments using crowdsourcing,” in First international workshop on videonext: design, quality and deployment of adaptive video streaming, Australia, Sydney, 2014, pp. 1-6.
    [Bibtex]
    @InProceedings{Rain1412:VNext,
    title = {Quality of Experience of Web-based Adaptive HTTP Streaming Clients in Real-World Environments using Crowdsourcing},
    author = {Rainer, Benjamin and Timmerer, Christian},
    booktitle = {First International Workshop on VideoNext: Design, Quality and Deployment of Adaptive Video Streaming},
    year = {2014},
    address = {Australia, Sydney},
    editor = {N, N},
    month = {dec},
    pages = {1-6},
    publisher = {ACM},
    keywords = {Dynamic Adaptive Streaming over HTTP; Crowdsourcing; Subjective Quality Assessment; Quality of Experience; QoE; DASH; MPEG},
    language = {EN},
    location = {Singapore},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/videoNextDASH.pdf},
    talkdate = {2014.12.02},
    talktype = {registered}
    }
  • [PDF] D. Posch, C. Kreuzberger, B. Rainer, and H. Hellwagner, “Using in-network adaptation to tackle inefficiencies caused by dash in information-centric networks,” in Proceedings of the 10th international conference on emerging networking experiments and technologies, videonext workshop, New York, NY, USA, 2014, pp. 1-6.
    [Bibtex]
    @InProceedings{Posch2014b,
    title = {Using In-Network Adaptation to Tackle Inefficiencies Caused by DASH in Information-Centric Networks},
    author = {Posch, Daniel and Kreuzberger, Christian and Rainer, Benjamin and Hellwagner, Hermann},
    booktitle = {Proceedings of the 10th International Conference on Emerging Networking Experiments and Technologies, VideoNext Workshop},
    year = {2014},
    address = {New York, NY, USA},
    editor = {Dixon, Colin},
    month = {dec},
    pages = {1-6},
    publisher = {ACM Digital Library},
    abstract = {The consumption of audio-visual content is the most dominant traffic source in today's Internet. Novel architectural approaches, such as Information-Centric Networking (ICN), are developed to support efficient multimedia dissemination. As ICN and MPEG-DASH have several concepts in common, recent proposals consider a fusion of both technologies. However, MPEG-DASH relies on pure client-driven adaptation. This often rather selfish adaptation strategy inhibits benefits gained from ICN's inherent caching and multi-path transmission capabilities. In order to overcome this challenge, the contribution of this work is the integration of in-network adaptation (INA) in ICN. We illustrate that INA can be realized despite ICN's content-based security model. Our proposal rests on scalable content, which enables INA without management and transmission overhead.},
    keywords = {Information-Centric Networking; In-Network Adaptation; Adaptive Streaming; Multimedia Dissemination},
    language = {EN},
    location = {Sydney, Australia},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/video01fp.pdf},
    talkdate = {2014.12.02},
    talktype = {registered}
    }
  • [PDF] [DOI] D. Posch, C. Kreuzberger, B. Rainer, and H. Hellwagner, “Client starvation: a shortcoming of client-driven adaptive streaming in named data networking,” in Proceedings of the 1st acm conference on information-centric networking, New York, NY, USA, 2014, pp. 1-2.
    [Bibtex]
    @InProceedings{Posch2014,
    title = {Client Starvation: A Shortcoming of Client-driven Adaptive Streaming in Named Data Networking},
    author = {Posch, Daniel and Kreuzberger, Christian and Rainer, Benjamin and Hellwagner, Hermann},
    booktitle = {Proceedings of the 1st ACM Conference on Information-Centric Networking},
    year = {2014},
    address = {New York, NY, USA},
    editor = {Mendes, Paulo},
    month = {sep},
    pages = {1-2},
    publisher = {ACM Digital Library},
    abstract = {Information-centric Networking (ICN) as a potential Future Internet architecture has to efficiently support the consumption of multimedia content. Recent proposals consider the reuse of MPEG-DASH to provide adaptive streaming in ICN. Due to the fact that MPEG-DASH relies on pure client-driven adaptation, it encounters difficulties dealing with ICN's inherent caching and multi-path transmission. By conducting simulations using the concrete ICN approach Named Data Networking (NDN), we show that pure client-driven adaptation leads to shortcomings. Furthermore, we propose to use in-network adaptation based on scalable content for overcoming these shortcomings in NDN.},
    doi = {10.1145/2660129.2660162},
    keywords = {Information-centric Networking; Adaptive Streaming},
    language = {EN},
    location = {Paris, Frankreich},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/icn14_final.pdf},
    talkdate = {2014.09.26},
    talktype = {poster},
    url = {http://dx.doi.org/10.1145/2660129.2660162}
    }
  • [PDF] C. Sieber, T. Hoßfeld, T. Zinner, P. Tran-Gia, and C. Timmerer, “Implementation and user-centric comparison of a novel adaptation logic for dash with svc,” in Integrated network management (im 2013), 2013 ifip/ieee international symposium on, New York, NY, USA, 2013, pp. 1318-1323.
    [Bibtex]
    @InProceedings{Sieber2013,
    title = {Implementation and User-centric Comparison of a Novel Adaptation Logic for DASH with SVC},
    author = {Sieber, Christian and Ho{\ss}feld, Tobias and Zinner, Thomas and Tran-Gia, Phuoc and Timmerer, Christian},
    booktitle = {Integrated Network Management (IM 2013), 2013 IFIP/IEEE International Symposium on},
    year = {2013},
    address = {New York, NY, USA},
    editor = {De Turck, Filip and Diao, Yixin and Hong, Choong Seon and Medhi, Deep and Sadre, Ramin},
    month = {may},
    pages = {1318-1323},
    publisher = {IEEE Communications Society},
    abstract = {The MPEG-DASH standard allows the client-centric access to different representations of video content via the HTTP protocol. The client can flexibly switch between different qualities, i.e., different bit rates and thus avoid waiting times during the video playback due to empty playback buffers. However, quality switches and the playback of lower qualities is perceived by the user which may reduce the Quality of Experience (QoE). Therefore, novel algorithms are required which manage the streaming behavior with respect to the user's requirements and which do not waste network resources. As indicated by recent studies, scalable video coding (SVC) may use the current network and content distribution infrastructure in a more efficient way than with single layer codecs. The contribution of this paper is the design and the implementation of a novel DASH/SVC streaming algorithm. By means of measurements in a test-bed, its performance and benefits are evaluated and compared to existing algorithms from an user-centric view point with objective performance metrics. Our findings show that the proposed algorithm outperforms other DASH mechanisms in terms of video quality, low switching frequency and usage of the available resources in a realistic mobile network scenario. This is a first step towards true QoE management of video streaming in the Internet with DASH and SVC.},
    isbn13 = {978-1-4673-5229-1},
    keywords = {quality of experience, mpeg-dash, scalable video coding, adaptive media streaming},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/06573184.pdf},
    talktype = {none}
    }
  • [PDF] D. Posch, H. Hellwagner, and P. Schartner, “On-demand video streaming based on dynamic adaptive encrypted content chunks,” in Proceedings of the 8th international workshop on secure network protocols (npsec’ 13), Los Alamitos, CA, USA, 2013, p. 6.
    [Bibtex]
    @InProceedings{Posch2013,
    title = {On-Demand Video Streaming based on Dynamic Adaptive Encrypted Content Chunks},
    author = {Posch, Daniel and Hellwagner, Hermann and Schartner, Peter},
    booktitle = {Proceedings of the 8th International Workshop on Secure Network Protocols (NPSec' 13)},
    year = {2013},
    address = {Los Alamitos, CA, USA},
    editor = {Li, Jun and Maennel, Olaf},
    month = {oct},
    pages = {6},
    publisher = {IEEE},
    abstract = {This paper proposes a framework for on-demand video streaming that enables secure and efficient delivery of data towards the end user. Our proposal requires the combined usage of three different technologies. The first one is a recent proposal by Jacobsen et al. called Content-Centric Networking (also known as Named Data Networking). It is a network architecture that introduces named data as the most valuable element in the network and divides it into so called content chunks, which are self-identifying and self-authenticating data units. The second concept we utilize derives from the approach of Dynamic Adaptive Streaming over HTTP, which allows clients to dynamically choose the quality of the received video stream according to their available resources. Finally, we adapt the concept of Broadcast Encryption to form a tool to control the access to provided content streams. The combination of these technologies enables us to design a framework that allows streaming providers to transport data to customers as dynamic adaptive encrypted content chunks, which is an efficient, flexible and scalable way of multimedia data transport.},
    keywords = {Content-Centric Networking, CCN, Named Data Networking, NDN, Dynamic Adaptive Streaming, DASH, Broadcast Encryption, Video on Demand},
    language = {EN},
    location = {Germany, Göttingen},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/ICNP_NPSEC_Streaming.pdf},
    talkdate = {2013.10.07},
    talktype = {registered}
    }
  • [PDF] C. Mueller, S. Lederer, J. Pöcher, and C. Timmerer, “Libdash – an open source software library for the mpeg-dash standard,” in In proceedings of the ieee international conference on multimedia and expo (icme) 2013, San Jose, USA, 2013, pp. 1-2.
    [Bibtex]
    @InProceedings{Mueller2013b,
    title = {libdash – An Open Source Software Library for the MPEG-DASH Standard},
    author = {Mueller, Christopher and Lederer, Stefan and Pöcher, Jörg and Timmerer, Christian},
    booktitle = {In Proceedings of the IEEE International Conference on Multimedia and Expo (ICME) 2013},
    year = {2013},
    address = {San Jose, USA},
    editor = {Servetti, Antonio and Aydin, Alatan},
    month = {jul},
    pages = {1-2},
    publisher = {IEEE},
    abstract = {Dynamic Adaptive Streaming over HTTP (DASH) is an ISO/IEC MPEG standard which enables the convenient and smooth transportation of multimedia data to heterogeneous end devices over networks with variable bandwidth conditions. This kind of streaming technology is mainly used with HTTP 1.0 and 1.1 respectively, which both have some drawbacks. Therefore, the IETF has started the development of HTTP 2.0, which is based on Google’s SPDY proposal and already supported by several major companies, e.g., Facebook, Twitter, Akamai, Mozilla and obviously Google. Furthermore, Content Centric Networking (CCN) is another novel approach for future networks that is considered as an revolutionary approach compared to HTTP 2.0. The CCN communication paradigm is completely different and does not rely on direct connections between hosts, it rather focuses on the content. This paper demonstrates DASH with HTTP 2.0/SPDY and CCN using our universal libdash library. Moreover, different mechanisms of DASH will be shown that can be used to provide on-demand and live content in an efficient and comfortable way.},
    language = {EN},
    location = {San Jose, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/libdash-demo.pdf},
    talkdate = {2013.07.18},
    talktype = {poster}
    }
  • [PDF] C. Mueller, S. Lederer, and C. Timmerer, “Fair share dynamic adaptive streaming over http,” Ieee multimedia communications technical committee e-letter, vol. 8, iss. 2, pp. 30-33, 2013.
    [Bibtex]
    @Article{Mueller2013_MMC,
    title = {Fair Share Dynamic Adaptive Streaming over HTTP},
    author = {Mueller, Christopher and Lederer, Stefan and Timmerer, Christian},
    journal = {IEEE Multimedia Communications Technical Committee E-Letter},
    year = {2013},
    month = {mar},
    number = {2},
    pages = {30-33},
    volume = {8},
    abstract = {Multimedia delivery over the Hypertext Transfer Protocol (HTTP) is currently very popular and with MPEGs' Dynamic Adaptive Streaming over HTTP (DASH) a standard is available to provide interoperability and enable large-scale deployments using existing infrastructures (servers, proxies, caches, etc.). This paper identifies some issue when multiple DASH clients compete for a bandwidth bottleneck when transparent proxy caches are deployed. Therefore, we propose a fair share adaptation scheme to be included within the client which – through experimental results – achieve a more efficient utilization of the bottleneck bandwidth and less quality switches.},
    address = {New York, NY, USA},
    keywords = {Dynamic Adaptive Streaming over HTTP, DASH, Fair Adaptation, Proxy Cache, Multimedia},
    language = {EN},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/E-Letter-March13.pdf},
    publisher = {IEEE Communications Society [online]},
    url = {http://committees.comsoc.org/mmc/e-news/E-Letter-March13.pdf}
    }
  • [PDF] C. Mueller, S. Lederer, C. Timmerer, and H. Hellwagner, “Dynamic adaptive streaming over http/2.0,” in In proceedings of the ieee international conference on multimedia and expo (icme) 2013, San Jose, USA, 2013, pp. 1-6.
    [Bibtex]
    @InProceedings{Mueller2013,
    title = {Dynamic Adaptive Streaming over HTTP/2.0},
    author = {Mueller, Christopher and Lederer, Stefan and Timmerer, Christian and Hellwagner, Hermann},
    booktitle = {In Proceedings of the IEEE International Conference on Multimedia and Expo (ICME) 2013},
    year = {2013},
    address = {San Jose, USA},
    editor = {Li, Jin},
    month = {jul},
    pages = {1-6},
    publisher = {IEEE},
    abstract = {MPEG Dynamic Adaptive Streaming over HTTP (DASH) is a new streaming standard that has been recently ratified as an international standard (IS). In comparison to other streaming systems, e.g., HTTP progressive download, DASH is able to handle varying bandwidth conditions providing smooth streaming. Furthermore, it enables NAT and Firewall traversal, flexible and scalable deployment as well as reduced infrastructure costs due to the reuse of existing Internet infrastructure components, e.g., proxies, caches, and Content Distribution Networks (CDN). Recently, the Hypertext Transfer Protocol Bis (httpbis) working group of the IETF has officially started the development of HTTP 2.0. Initially three major proposals have been submitted to the IETF i.e., Googles' SPDY, Microsofts' HTTP Speed+Mobility and Network-Friendly HTTP Upgrade, but SPDY has been chosen as working draft for HTTP 2.0. In this paper we implemented MPEG-DASH over HTTP 2.0 (i.e., SPDY), demonstrating its potential benefits and drawbacks. Moreover, several experimental evaluations have been performed that compare HTTP 2.0 with HTTP 1.1 and HTTP 1.0 in the context of DASH. In particular, the protocol overhead, the performance for different round trip times, and DASH with HTTP 2.0 in a lab test scenario has been evaluated in detail.},
    language = {EN},
    location = {San Jose, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/paper_330.pdf},
    talkdate = {2013.07.17},
    talktype = {registered}
    }
  • [PDF] Y. Liu, J. Geurts, J. Point, S. Lederer, B. Rainer, C. Mueller, C. Timmerer, and H. Hellwagner, “Dynamic adaptive streaming over ccn: a caching and overhead analysis,” in Proceedings of the ieee international conference on communication (icc) 2013 – next-generation networking symposium, Budapest, 2013, pp. 2222-2226.
    [Bibtex]
    @InProceedings{Liu2013,
    title = {Dynamic Adaptive Streaming over CCN: A Caching and Overhead Analysis},
    author = {Liu, Yaning and Geurts, Joost and Point, Jean-Charles and Lederer, Stefan and Rainer, Benjamin and Mueller, Christopher and Timmerer, Christian and Hellwagner, Hermann},
    booktitle = {Proceedings of the IEEE international Conference on Communication (ICC) 2013 – Next-Generation Networking Symposium},
    year = {2013},
    address = {Budapest},
    editor = {Mattheisen, Christopher and Murase, Tutomu},
    month = {jun},
    pages = {2222-2226},
    publisher = {IEEE},
    abstract = {In this paper, we present our implementation and evaluation of Dynamic Adaptive Streaming over Content centric networking (DASC) which implements MPEG Dynamic Adaptive Streaming over HTTP (DASH) utilizing a Content Centric Networking (CCN) naming scheme to identify content segments in a CCN network. In particular, video segments formatted according to MPEG-DASH are available in different quality levels but instead of HTTP, CCN is used for referencing and delivery. Based on the conditions of the network, the DASC client issues interests for segments achieving the best throughput. Due to segment caching within the network, subsequent requests for the same content can be served quicker. As a result, the quality of the video a user receives progressively improves, effectively overcoming bottlenecks in the network. We present two sets of experiments to evaluate the performance of DASC showing that throughput indeed improves. However, the generated overhead is relatively large and the adaptation strategy used for DASH that assumes an end-to-end connection could be revised for the hop-by-hop architecture of CCN.},
    keywords = {Content Centric Networking, Dynamic Adaptive Streaming, HTTP Video Streaming, MPEG-DASH},
    language = {EN},
    location = {Budapest, Hungary},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/ICC2013 -DASH Over CCN.PDF},
    talkdate = {2013.06.11},
    talktype = {registered},
    url = {http://www.ieee-icc.org}
    }
  • [PDF] S. Lederer, C. Mueller, B. Rainer, C. Timmerer, and H. Hellwagner, “An experimental analysis of dynamic adaptive streaming over http in content centric networks,” in Proceedings of the ieee international conference on multimedia and expo (icme) 2013, San Jose, USA, 2013, pp. 1-6.
    [Bibtex]
    @InProceedings{Lederer2013c,
    title = {An Experimental Analysis of Dynamic Adaptive Streaming over HTTP in Content Centric Networks},
    author = {Lederer, Stefan and Mueller, Christopher and Rainer, Benjamin and Timmerer, Christian and Hellwagner, Hermann},
    booktitle = {Proceedings of the IEEE International Conference on Multimedia and Expo (ICME) 2013},
    year = {2013},
    address = {San Jose, USA},
    editor = {Wang, Haohong},
    month = {jul},
    pages = {1-6},
    publisher = {IEEE},
    abstract = {This paper presents the usage of CCN, which is a candidate for the next-generation Internet, in combination with the new Dynamic Adaptive Streaming over HTTP (DASH) standard, which was recently ratified by ISO/IEC MPEG. In contrast to the Internet Protocol, which is mainly based on the host-to-host connection paradigm originated in the 1970s, Content Centric Networking (CCN) focuses on the content itself, instead of its location. Considering the dominance of multimedia traffic in todays' Internet, the streaming performance of DASH over CCN as well as the problems introduced by this combination is worth to be investigated in detail. Therefore, we evaluate the protocol overhead introduced by the usage of CCN compared to the HTTP versions 1.0 and 1.1. Furthermore, the performance of DASH over CCN under different network conditions is compared to the performance of HTTP 1.0/1.1. Our results showed that although CCN comes together with higher protocol overhead than HTTP 1.0/1.1 as well as a prototype implementation, it can definitely compete with HTTP 1.0 in media streaming. Based on the evaluation results, problems as well as improvement possibilities are identified, which are the basis for future work in this area.},
    language = {EN},
    location = {San Jose, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/ICME_Overhead-Performance-DASHoverCCN.pdf},
    talkdate = {2013.07.18},
    talktype = {registered}
    }
  • [PDF] S. Lederer, C. Mueller, B. Rainer, C. Timmerer, and H. Hellwagner, “Adaptive streaming over content centric networks in mobile networks using multiple links,” in In proceedings of the ieee icc’13 – workshop on immersive & interactive multimedia communications over the future internet, Budapest, 2013, pp. 687-691.
    [Bibtex]
    @InProceedings{Lederer2013b,
    title = {Adaptive Streaming over Content Centric Networks in Mobile Networks using Multiple Links},
    author = {Lederer, Stefan and Mueller, Christopher and Rainer, Benjamin and Timmerer, Christian and Hellwagner, Hermann},
    booktitle = {In Proceedings of the IEEE ICC'13 - Workshop on Immersive \& Interactive Multimedia Communications over the Future Internet},
    year = {2013},
    address = {Budapest},
    editor = {Assuncao, Pedro and Atzori, Luigi and Dagiuklas, Tasos and Kondoz, Ahmet},
    month = {jun},
    pages = {687-691},
    publisher = {IEEE},
    abstract = {This paper presents the usage of Content Centric Networking (CCN) for adaptive multimedia streaming in mobile environments, leveraging the recent ISO/IEC MPEG Dynamic Adaptive Streaming over HTTP (DASH) standard. The performance of DASH over CCN is evaluated using real-world mobile bandwidth traces and compared to previous evaluations of different DASH-based as well as proprietary systems. As there are no client-server connections in CCN, it offers the possibility to transfer data from multiple sources as well as over multiple links in parallel, which is definitely an important feature, e.g., for mobile devices offering multiple network links. This functionality is used and evaluated in this paper in combination with DASH, making it possible to dynamically choose the best performing link for media streaming, which is a clear advantage over DASH using HTTP and the TCP/IP protocol stack. The evaluation therefore investigates DASH over CCN in two scenarios using synthetic and real-world mobile bandwidth traces respectively, showing a significantly better performance than conventional DASH using only one connection.},
    keywords = {MPEG-DASH, CCN, Dynamic Adaptive Streaming over HTTP, Content Centric Networking, Evaluation},
    language = {EN},
    location = {Budapest, Hungary},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/ICC2013_Mobile_DASHoverCCN.pdf},
    talkdate = {2013.06.13},
    talktype = {registered},
    url = {http://multicomm.diee.unica.it/}
    }
  • [PDF] S. Lederer, C. Mueller, C. Timmerer, C. Concolato, J. Le Feuvre, and K. Fliegel, “Distributed dash dataset,” in Proceedings of the 4th acm multimedia systems conference, New York, NY, USA, 2013, p. pp. 131-135.
    [Bibtex]
    @InProceedings{Lederer2013a,
    title = {Distributed DASH Dataset},
    author = {Lederer, Stefan and Mueller, Christopher and Timmerer, Christian and Concolato, Cyril and Le Feuvre, Jean and Fliegel, Karel},
    booktitle = {Proceedings of the 4th ACM Multimedia Systems Conference},
    year = {2013},
    address = {New York, NY, USA},
    editor = {Griwodz, Carsten},
    month = {feb},
    pages = {pp. 131-135},
    publisher = {ACM},
    abstract = {The delivery of multimedia content over HTTP and on top of existing Internet infrastructures is becoming the preferred method within heterogeneous environment. The basic design principle is having an intelligent client which selects given and applicable media representations by issuing HTTP requests for individual segments based on the users' context and current conditions. Typically, this client behavior differs between implementations of the same kind and for the objective evaluations thereof appropriate datasets are needed. This paper presents a distributed dataset for the recently published MPEG-DASH standard which is mirrored at different sites across Europe, namely Klagenfurt, Paris, and Prague. A client implementation may choose to request segments from these sites and dynamically switch to a different location, e.g., in case the one currently used causes any issues. Thus, this distributed DASH dataset can be used for real-world evaluations enabling the simulation of switching between different content delivery networks.},
    keywords = {Dataset, Dynamic Adaptive Streaming over HTTP, DASH.},
    language = {EN},
    location = {Oslo, Norway},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/MMSys_CDN_Simulation_Dataset_v2.0.pdf},
    talkdate = {2013.02.27},
    talktype = {registered},
    url = {http://www.mmsys.org/}
    }
  • [PDF] M. Grafl, C. Timmerer, H. Hellwagner, W. Cherif, and A. Ksentini, “Evaluation of hybrid scalable video coding for HTTP-based adaptive media streaming with high-definition content,” in Proceedings of the 2nd IEEE WoWMoM workshop on video everywhere (ViDEv 2013), Los Alamitos, CA, USA, 2013, p. 7.
    [Bibtex]
    @InProceedings{Grafl2013_ViDEv,
    title = {Evaluation of Hybrid Scalable Video Coding for {HTTP}-based Adaptive Media Streaming with High-Definition Content},
    author = {Grafl, Michael and Timmerer, Christian and Hellwagner, Hermann and Cherif, Wael and Ksentini, Adlen},
    booktitle = {Proceedings of the 2nd {IEEE} {WoWMoM} Workshop on Video Everywhere ({ViDEv} 2013)},
    year = {2013},
    address = {Los Alamitos, CA, USA},
    editor = {Todd, Terence D and Paterakis, Michael},
    month = {jun},
    pages = {7},
    publisher = {IEEE},
    abstract = {Scalable Video Coding (SVC) in media streaming enables dynamic adaptation based on device capabilities and network conditions. In this paper, we investigate deployment options of SVC for Dynamic Adaptive Streaming over HTTP (DASH) with a special focus on scalability options, which are relevant for dynamic adaptation, especially in wireless and mobile environments. We evaluate the performance of SVC with respect to spatial and quality scalability options and compare it to non-scalable Advanced Video Coding (AVC). Performance evaluations are performed for various encoder implementations with high-definition (1080p) content. We show that a hybrid approach with multiple independent SVC bitstreams can have advantages in storage requirements at comparable rate-distortion performance.},
    keywords = {scalable video coding; HTTP streaming; adaptation; high-definition; hybrid SVC-DASH},
    language = {EN},
    location = {Madrid, Spain},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/Hybrid_SVC-DASH.pdf},
    talkdate = {2013.06.04},
    talktype = {registered}
    }
  • M. Grafl, C. Timmerer, H. Hellwagner, W. Cherif, and A. Ksentini, “Hybrid scalable video coding for HTTP-based adaptive media streaming with high-definition content,” Computer communications, p. 11, 2013.
    [Bibtex]
    @Article{Grafl2013_ComCom,
    title = {Hybrid Scalable Video Coding for {HTTP}-based Adaptive Media Streaming with High-Definition Content},
    author = {Grafl, Michael and Timmerer, Christian and Hellwagner, Hermann and Cherif, Wael and Ksentini, Adlen},
    journal = {Computer Communications},
    year = {2013},
    month = {dec},
    pages = {11},
    abstract = {Scalable Video Coding (SVC) in media streaming enables dynamic adaptation based on device capabilities and network conditions. In this paper, we investigate deployment options of SVC for Dynamic Adaptive Streaming over HTTP (DASH) with a special focus on scalability options, which are relevant for dynamic adaptation, especially in wireless and mobile environments. We establish encoding recommendations and evaluate the performance of SVC with respect to spatial and quality scalability options and compare it to non-scalable Advanced Video Coding (AVC). Performance evaluations are performed for various encoder implementations with high-definition (1080p) content. We show that a hybrid approach with multiple independent SVC bitstreams can have advantages in storage requirements at comparable rate-distortion performance.},
    address = {Amsterdam, Netherlands},
    issn = {01403664},
    language = {EN},
    publisher = {Elsevier}
    }
  • [DOI] G. Gardikis, E. Pallis, and M. Grafl, “Media-aware networks in future internet media,” in 3d future internet media, A. Kondoz and T. Dagiuklas, Eds., New York: Springer Science+Business Media, LLC, 2013, p. 6.
    [Bibtex]
    @InCollection{Gardikis2013_3DFIM,
    title = {Media-Aware Networks in Future Internet Media},
    author = {Gardikis, Georgios and Pallis, Evangelos and Grafl, Michael},
    booktitle = {3D Future Internet Media},
    publisher = {Springer Science+Business Media, LLC},
    year = {2013},
    address = {New York},
    editor = {Kondoz, Ahmet and Dagiuklas, Tasos},
    month = {dec},
    pages = {6},
    abstract = {Multimedia (especially video) services constitute a dominant and ever increasing portion of the global Internet traffic, while they are expected to also play a major role in the Future Internet scene. In order to address this reality in the networking domain, a promising perspective is to gradually shift from the current, service-unaware, best-effort nature of IP networks into a network logic which is service-aware – and, in specific, media-aware. This chapter discusses how media-awareness can be introduced in the networking domain in a way which is both feasible and scalable, leveraging at the same time state-of-the-art technologies in video representations, such as Scalable Video Coding (SVC) and Dynamic Adaptive Streaming over HTTP (DASH).},
    doi = {10.1007/978-1-4614-8373-1_7},
    language = {EN},
    url = {http://link.springer.com/chapter/10.1007/978-1-4614-8373-1_7}
    }
  • [PDF] B. Crabtree, T. Stevens, B. Allan, S. Lederer, D. Posch, C. Mueller, and C. Timmerer, “Video adaptation in limited or zero network coverage,” in Ccnxconn 2013, Palo Alto, 2013, pp. 1-2.
    [Bibtex]
    @InProceedings{Crabtree2013,
    title = {Video Adaptation in Limited or Zero Network Coverage},
    author = {Crabtree, Barry and Stevens, Tim and Allan, Brahin and Lederer, Stefan and Posch, Daniel and Mueller, Christopher and Timmerer, Christian},
    booktitle = {CCNxConn 2013},
    year = {2013},
    address = {Palo Alto},
    editor = {Mahadevan, Priya},
    month = {sep},
    pages = {1-2},
    publisher = {PARC},
    abstract = {This paper shows how adaptive streaming and on-device caching can be used to provide an always available video service. A DASH client has been extended to deal with periods of zero network connectivity, and seamlessly works in conjunction with CCN to provide local storage that is intelligently updated to provide an improved quality of experience.},
    language = {EN},
    location = {Palo Alto, CA, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/Video adaptation in limited or zero network coverage-CCNxCon.pdf},
    talkdate = {2013.09.06},
    talktype = {poster},
    url = {http://www.ccnx.org/ccnxcon2013/ccnxcon-2013-official-agenda/}
    }
  • [PDF] C. Alberti, D. Renzi, C. Timmerer, C. Mueller, S. Lederer, S. Battista, and M. Mattavelli, “Automated qoe evaluation of dynamic adaptive streaming over http,” in Proceedings of the 5th international workshop on quality of multimedia experience (qomex’13), Los Alamitos, CA, USA, 2013, p. 58–63.
    [Bibtex]
    @InProceedings{Alberti_QoMEX2013_DASH,
    title = {Automated QoE Evaluation of Dynamic Adaptive Streaming over HTTP},
    author = {Alberti, Claudio and Renzi, Daniele and Timmerer, Christian and Mueller, Christopher and Lederer, Stefan and Battista, Stefano and Mattavelli, Marco},
    booktitle = {Proceedings of the 5th International Workshop on Quality of Multimedia Experience (QoMEX'13)},
    year = {2013},
    address = {Los Alamitos, CA, USA},
    editor = {Timmerer, Christian and Le Callet, Patrick and Varela, Martin and Winkler, Stefan and Falk, Tiago},
    month = {jul},
    pages = {58--63},
    publisher = {IEEE},
    abstract = {Dynamic Adaptive Streaming over HTTP (DASH) is referred to as a multimedia streaming standard to deliver high quality multimedia content over the Internet using conventional HTTP Web servers. As a fundamental feature, it enables automatic switching of quality levels according to network conditions, user requirements, and expectations. Currently, the proposed adaptation schemes for HTTP streaming mostly rely on throughput measurements and/or buffer-related metrics, such as buffer exhaustion and levels. In this paper, we propose to enhance the DASH adaptation logic by feeding it with additional information from our evaluation of the users' perception approximating the user- perceived quality of video playback. The proposed model aims at conveniently combining TCP-, buffer-, and media content-related metrics as well as user requirements and expectations to be used as an input for the DASH adaptation logic. Experiments have demonstrated that the chosen model enhances the capability of the adaptation logic to select the optimal video quality level. Finally, we integrated all our findings into a real DASH system with QoE monitoring capabilities.},
    keywords = {DASH, Quality of Experience, monitoring, content adaptation},
    language = {EN},
    location = {Klagenfurt am Wörthersee, Austria},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/p20-Alberti.pdf},
    talkdate = {2013.07.03},
    talktype = {registered}
    }
  • [PDF] [DOI] C. Timmerer and C. Griwodz, “Dynamic adaptive streaming over http: from content creation to consumption,” in Proceedings of the 20th acm international conference on multimedia, New York, NY, USA, 2012, p. 1533–1534.
    [Bibtex]
    @InProceedings{Timmerer2012_ACMMM,
    title = {Dynamic adaptive streaming over HTTP: from content creation to consumption},
    author = {Timmerer, Christian and Griwodz, Carsten},
    booktitle = {Proceedings of the 20th ACM international conference on Multimedia},
    year = {2012},
    address = {New York, NY, USA},
    editor = {Babaguchi, Noboru and Aizawa, Kiyoharu and Smith, John},
    month = {oct},
    pages = {1533--1534},
    publisher = {ACM},
    series = {MM '12},
    abstract = {In this tutorial we present dynamic adaptive streaming over HTTP ranging from content creation to consumption. It particular, it provides an overview of the recently ratified MPEG-DASH standard, how to create content to be delivered using DASH, its consumption, and the evaluation thereof with respect to competing industry solutions. The tutorial can be roughly clustered into three parts. In part I we will provide an introduction to DASH, part II covers content creation, delivery, and consumption, and, finally, part III deals with the evaluation of existing (open source) MPEG-DASH implementations compared to state-of-art deployed industry solutions.},
    doi = {10.1145/2393347.2396553},
    keywords = {MPEG, adaptation, dash, dynamic adaptive http streaming, streaming},
    language = {EN},
    location = {Nara, Japan},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/mtu008-timmerer.pdf},
    slides = {http://www-itec.uni-klu.ac.at/bib/files/mtu008-timmerer-slides.pdf},
    talkdate = {2012.10.29},
    talktype = {registered},
    url = {http://doi.acm.org/10.1145/2393347.2396553}
    }
  • [PDF] B. Rainer, S. Lederer, C. Mueller, and C. Timmerer, “A seamless web integration of adaptive http streaming,” in Proceedings of the 20th european signal processing conference (eusipco), Bucharest, Romania, 2012, pp. 1519-1523.
    [Bibtex]
    @InProceedings{Rainer2012_EUSIPCO2012,
    title = {A Seamless Web Integration of Adaptive HTTP streaming},
    author = {Rainer, Benjamin and Lederer, Stefan and Mueller, Christopher and Timmerer, Christian},
    booktitle = {Proceedings of the 20th European Signal Processing Conference (EUSIPCO)},
    year = {2012},
    address = {Bucharest, Romania},
    editor = {Pesquet-Popescu, Béatrice and Burileanu, Corneliu},
    month = {aug},
    pages = {1519-1523},
    publisher = {European Signal Processing (EURASIP) Society},
    abstract = {Nowadays video is an important part of the Web and Web sites like YouTube, Hulu, etc. count millions of users consuming their content every day. However, these Web sites mainly use media players based on proprietary browser plug-ins (i.e., Adobe Flash) and do not leverage adaptive streaming systems. This paper presents a seamless integration of the recent MPEG standard on Dynamic Adaptive Streaming over HTTP (DASH) in the Web using the HTML5 video element. Therefore, we present DASHJS, a JavaScript-based MPEG-DASH client which adopts the Media Source API of Google’s Chrome browser to present a flexible and potentially browser independent DASH client. Furthermore, we present the integration of WebM based media segments in DASH giving a detailed description of the used container format structure and a corresponding Media Presentation Description (MPD). Our preliminary evaluation demonstrates the bandwidth adaption capabilities to show the effectiveness of the system.},
    language = {EN},
    location = {Bucharest, Romania},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/DASHJS-Eusipco.pdf},
    talkdate = {2012.08.30},
    talktype = {registered}
    }
  • [PDF] C. Mueller, D. Renzi, S. Lederer, S. Battista, and C. Timmerer, “Using scalable video coding for dynamic adaptive streaming over http in mobile environments,” in Proceedings of the 20th european signal processing conference (eusipco12), Bucharest, Romania, 2012, pp. 2208-2212.
    [Bibtex]
    @InProceedings{Mueller2012b,
    title = {Using Scalable Video Coding for Dynamic Adaptive Streaming over HTTP in Mobile Environments},
    author = {Mueller, Christopher and Renzi, Daniele and Lederer, Stefan and Battista, Stefano and Timmerer, Christian},
    booktitle = {Proceedings of the 20th European Signal Processing Conference (EUSIPCO12)},
    year = {2012},
    address = {Bucharest, Romania},
    editor = {Burileanu, Corneliu and Pesquet-Popescu, Béatrice},
    month = {aug},
    pages = {2208-2212},
    publisher = {European Signal Processing (EURASIP) Society},
    abstract = {Dynamic Adaptive Streaming over HTTP (DASH) is a convenient approach to transfer videos in an adaptive and dynamic way to the user. As a consequence, this system provides high bandwidth flexibility and is especially suitable for mobile use cases where the bandwidth variations are tremendous. In this paper we have integrated the Scalable Video Coding (SVC) extensions of the Advanced Video Coding (AVC) standard into the recently ratified MPEG-DASH standard. Furthermore, we have evaluated our solution under restricted conditions using bandwidth traces from mobile environments and compared it with an improved version of our MPEG-DASH implementation using AVC as well as major industry solutions.},
    keywords = {Dynamic Adaptive Streaming over {HTTP}, {MPEG-DASH}, Scalable Video Coding, Evaluation, Mobile Networks, Vehicular Mobility},
    language = {EN},
    location = {Bucharest, Romania},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/mueller_svc-dash.pdf},
    talkdate = {2012.08.31},
    talktype = {registered}
    }
  • [PDF] C. Mueller, S. Lederer, and C. Timmerer, “An evaluation of dynamic adaptive streaming over http in vehicular environments,” in Proceedings of the fourth annual acm sigmm workshop on mobile video (movid12), New York, NY, USA, 2012, pp. 37-42.
    [Bibtex]
    @InProceedings{Mueller2012a,
    title = {An Evaluation of Dynamic Adaptive Streaming over HTTP in Vehicular Environments},
    author = {Mueller, Christopher and Lederer, Stefan and Timmerer, Christian},
    booktitle = {Proceedings of the Fourth Annual ACM SIGMM Workshop on Mobile Video (MoVid12)},
    year = {2012},
    address = {New York, NY, USA},
    editor = {Hefeeda, Mohamed and Hsu, Cheng-Hsin and Chatterjee, Mainak and Venkatasubramanian, Nalini and Ganguly, Samrat},
    month = {feb},
    pages = {37-42},
    publisher = {ACM},
    abstract = {MPEGs' Dynamic Adaptive Streaming over HTTP (MPEG-DASH) is an emerging standard designed for media delivery over the top of existing infrastructures and able to handle varying bandwidth conditions during a streaming session. This requirement is very important, specifically within mobile environments and, thus, DASH could potentially become a major driver for mobile multimedia streaming. Hence, this paper provides a detailed evaluation of our implementation of MPEG DASH compared to the most popular propriety systems, i.e., Microsoft Smooth Steaming, Adobe HTTP Dynamic Streaming, and Apple HTTP Live Streaming. In particular, these systems will be evaluated under restricted conditions which are due to vehicular mobility. In anticipation of the results, our prototype implementation of MPEG-DASH can very well compete with state-of-the-art solutions and, thus, can be regarded as a mature standard ready for industry adaption.},
    keywords = {Dynamic Adaptive Streaming over HTTP, MPEG-DASH, Microsoft Smooth Streaming, Adobe HTTP Dynamic Streaming, Evaluation, Apple HTTP Live Streaming, Mobile Networks, Vehicular Mobility},
    language = {EN},
    location = {Chapel Hill, North Carolina, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/p37-mueller.pdf},
    talkdate = {2012.02.24},
    talktype = {registered}
    }
  • [PDF] C. Mueller, S. Lederer, and C. Timmerer, “A proxy effect analysis and fair adaptation algorithm for multiple competing dynamic adaptive streaming over http clients,” in Proceedings of the ieee conference on visual communications and image processing conference (vcip 2012), San Diego, CA, USA, 2012, p. 6.
    [Bibtex]
    @InProceedings{Mueller2012VCIP,
    title = {A Proxy Effect Analysis and Fair Adaptation Algorithm for Multiple Competing Dynamic Adaptive Streaming over HTTP Clients},
    author = {Mueller, Christopher and Lederer, Stefan and Timmerer, Christian},
    booktitle = {Proceedings of the IEEE Conference on Visual Communications and Image Processing Conference (VCIP 2012)},
    year = {2012},
    address = {San Diego, CA, USA},
    editor = {Aizawa, Kiyoharu and Kuo, Jay and Liu, Zicheng},
    month = {nov},
    pages = {6},
    publisher = {IEEE},
    abstract = {Multimedia streaming technologies based on the Hypertext Transfer Protocol (HTTP) are very popular and used by many content providers such as Netflix, Hulu, and Vudu. Recently, ISO/IEC MPEG has ratified Dynamic Adaptive Streaming over HTTP (DASH) which extends the traditional HTTP streaming with an adaptive component addressing the issue of varying bandwidth conditions that users are facing in networks based on the Internet Protocol (IP). Additionally, industry has already deployed several solutions based on such an approach which simplifies large scale deployment because the whole streaming logic is located at the client. However, these features may introduce drawbacks when multiple clients compete for a network bottleneck due to the fact that the clients are not aware of the network infrastructure such as proxies or other clients. This paper identifies these negative effects and the evaluation thereof using MPEG-DASH and Microsoft Smooth Streaming. Furthermore, we propose a novel adaptation algorithm introducing the concept of fairness regarding a cluster of clients. In anticipation of the results we can conclude that we achieve more efficient bottleneck bandwidth utilization and less quality switches.},
    language = {EN},
    location = {San Diego, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/PID2500949.pdf},
    talkdate = {2012.11.29},
    talktype = {registered},
    url = {http://www.vcip2012.org}
    }
  • [PDF] S. Lederer, C. Mueller, and C. Timmerer, “Dynamic adaptive streaming over HTTP dataset,” in Proceedings of the third annual ACM SIGMM conference on multimedia systems (MMSys12), New York, NY, USA, 2012, pp. 89-94.
    [Bibtex]
    @InProceedings{Mueller2012,
    title = {Dynamic Adaptive Streaming over {HTTP} Dataset},
    author = {Lederer, Stefan and Mueller, Christopher and Timmerer, Christian},
    booktitle = {Proceedings of the Third Annual {ACM SIGMM} Conference on Multimedia Systems ({MMSys12})},
    year = {2012},
    address = {New York, NY, USA},
    editor = {Claypool, Mark and Griwodz, Carsten and Mayer-Patel, Ketan},
    month = {feb},
    pages = {89-94},
    publisher = {ACM},
    abstract = {Adaptive HTTP streaming got lot of attention in recent years and with dynamic adaptive streaming over HTTP (DASH) a standard is available. Many papers cover this topic and present their research results, but unfortunately all of them use their own private dataset which – in most cases – is not publicly available. Hence, it is difficult to compare, e.g., adaptation algorithms in an objective way due to the lack of a common dataset which shall be used as basis for such experiments. In this paper, we present our DASH dataset featuring our DASHEncoder, an open source DASH content generation tool. We also provide basic evaluations of the different segment lengths, the influence of HTTP server settings, and, in this context, we show some of the advantages as well as problems of shorter segment lengths.},
    keywords = {Dynamic Adaptive Streaming over HTTP, DASH, Dataset, Encoder, Content Generation Tool},
    language = {EN},
    location = {Chapel Hill, North Carolina, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/p89-lederer.pdf},
    talkdate = {2012.02.22},
    talktype = {registered}
    }
  • [PDF] Y. Liu, J. Geurts, B. Rainer, S. Lederer, C. Mueller, and C. Timmerer, “Dash over ccn: a ccn use-case for a social media based collaborative project,” in Ccnx community meeting (ccnxconn 2012), Sophia Antipolis, 2012, pp. 1-1.
    [Bibtex]
    @InProceedings{Lederer2012c,
    title = {DASH over CCN: A CCN use-case for a Social Media based collaborative project},
    author = {Liu, Yaning and Geurts, Joost and Rainer, Benjamin and Lederer, Stefan and Mueller, Christopher and Timmerer, Christian},
    booktitle = {CCNx Community Meeting (CCNxConn 2012)},
    year = {2012},
    address = {Sophia Antipolis},
    editor = {Carofiglio, Giovanna},
    month = {sep},
    pages = {1-1},
    publisher = {Parc},
    keywords = {CCN, DASH},
    language = {EN},
    location = {Sophia Antipolis, France},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/DashOverCCN.pdf},
    talkdate = {2012.09.12},
    talktype = {registered},
    url = {http://www.ccnx.org/ccnxcon2012/}
    }
  • [PDF] S. Lederer, C. Mueller, B. Rainer, M. Waltl, and C. Timmerer, “An open source mpeg dash evaluation suite,” in Proceedings of the ieee conference on visual communications and image processing conference (vcip 2012), San Diego, CA, USA, 2012, pp. 1-1.
    [Bibtex]
    @InProceedings{Lederer2012b,
    title = {An open source MPEG DASH evaluation suite},
    author = {Lederer, Stefan and Mueller, Christopher and Rainer, Benjamin and Waltl, Markus and Timmerer, Christian},
    booktitle = {Proceedings of the IEEE Conference on Visual Communications and Image Processing Conference (VCIP 2012)},
    year = {2012},
    address = {San Diego, CA, USA},
    editor = {Izquierdo, Ebroul and Wang, Xin},
    month = {nov},
    pages = {1-1},
    publisher = {IEEE},
    abstract = {In this paper we demonstrate our MPEG-DASH evaluation suite, which comprises several components on the client side as well as on the server side. The major client components are the VLC DASH plugin, libDASH, and DASH-JS, a JavaScript-based DASH client. These tools enable performance tests on various platforms, e.g., Windows and Linux as well as mobile platforms such as Android. Moreover, due to their flexible structure it is possible to integrate adaptation logics and evaluate them under consistent conditions. On the server side we provide the content generation tool DASHEncoder, our MPEG-DASH datasets well as the MPEG-DASH conformance validator.},
    keywords = {MPEG DASH, Open Source, Demo},
    language = {EN},
    location = {San Diego, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/open-source_MPEG-DASH_evaluation_suite.pdf},
    talkdate = {2012.11.29},
    talktype = {registered},
    url = {http://www.vcip2012.org}
    }
  • [PDF] S. Lederer, C. Mueller, and C. Timmerer, “Towards peer-assisted dynamic adaptive streaming over http,” in Proceedings of the 19th international packet video workshop (PV 2012), Munich, Germany, 2012, pp. 1-6.
    [Bibtex]
    @InProceedings{Lederer2012,
    title = {Towards Peer-Assisted Dynamic Adaptive Streaming over HTTP},
    author = {Lederer, Stefan and Mueller, Christopher and Timmerer, Christian},
    booktitle = {Proceedings of the 19th International Packet Video Workshop ({PV} 2012)},
    year = {2012},
    address = {Munich, Germany},
    editor = {Guillemot, Christine and Chakareski, Jacob and Steinbach, Eckehard},
    month = {may},
    pages = {1-6},
    publisher = {IEEE},
    abstract = {This paper presents our peer-assisted Dynamic Adaptive Streaming over HTTP (pDASH) proposal as well as an evaluation based on our DASH simulation environment in comparison to conventional approaches, i.e., non-peer-assisted DASH. Our approach maintains the standard conformance to MPEG-DASH enabling an easy and straightforward way of enhancing a streaming system with peer assistance to reduce the bandwidth and infrastructure requirements of the content/service provider. In anticipation of the results our system achieves a bandwidth reduction of Content Distribution Networks (CDN) and as a consequence the corresponding infrastructure costs of the content/service providers by up to 25% by leveraging the upstream capacity of neighboring peers. Furthermore, the cost savings have been evaluated using a cost model that is based on the current Amazon CloudFront pricing scheme. Furthermore, we have also evaluated the performance impact that various combinations of quality levels of the content could have in a peer-assisted streaming system as well as the client behavior in such an environment.},
    keywords = {Peer-Assisted Streaming, MPEG-DASH, Dynamic Adaptive Streaming over HTTP, CDN Bandwidth Reduction, Peer-to-Peer Streaming.},
    language = {EN},
    location = {Munich, Germany},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/Paper53.pdf},
    talkdate = {2012.05.10},
    talktype = {registered}
    }
  • [PDF] [DOI] C. Mueller and C. Timmerer, “A vlc media player plugin enabling dynamic adaptive streaming over http,” in Proceedings of the 19th acm international conference on multimedia, New York, NY, USA, 2011, p. 723–726.
    [Bibtex]
    @InProceedings{Mueller2011_ACMMM,
    title = {A VLC media player plugin enabling dynamic adaptive streaming over HTTP},
    author = {Mueller, Christopher and Timmerer, Christian},
    booktitle = {Proceedings of the 19th ACM international conference on Multimedia},
    year = {2011},
    address = {New York, NY, USA},
    editor = {Candan, Kasim Selcuk and Panchanathan, Sethuraman and Prabhakaran, Balakrishnan and Sundaram, Hari and Feng, Wu-Chi and Sebe, Nicu},
    month = {nov},
    pages = {723--726},
    publisher = {ACM},
    series = {MM},
    abstract = {This paper describes the implementation of a VLC media player plugin enabling Dynamic Adaptive Streaming over HTTP (DASH). DASH is an emerging ISO/IEC MPEG and 3GPP standard for HTTP streaming. It aims to standardize formats enabling segmented progressive download by exploiting existing Internet infrastructure as such. Our implementation of these formats as described in this paper is based on the well-known VLC. Hence, it is fully integrated into the VLC structure and has been also submitted to the VLC development team for consideration in future releases of VLC. Therefore, it is licensed under the GNU Lesser General Public License (LGPL). The plugin provides a very flexible structure that could be easily extended with respect to different adaptation logics or profiles of the DASH standard. As a consequence, the plugin enables the integration of a variety of adaptation logics and comparison thereof, making it attractive for the research community.},
    doi = {10.1145/2072298.2072429},
    keywords = {3GPP, DASH, HTTP streaming, MPEG, dynamic adaptive streaming over HTTP, video},
    language = {EN},
    location = {Scottsdale, Arizona, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/p723-muller.pdf},
    talkdate = {2011.11.29},
    talktype = {registered}
    }
  • [PDF] C. Mueller and C. Timmerer, “A test-bed for the dynamic adaptive streaming over HTTP featuring session mobility,” in Proceedings of the second annual ACM SIGMM conference on multimedia systems (MMSys), New York, NY, USA, 2011, p. 271–276.
    [Bibtex]
    @InProceedings{Mueller2011,
    title = {A Test-Bed for the Dynamic Adaptive Streaming over {HTTP} featuring Session Mobility},
    author = {Mueller, Christopher and Timmerer, Christian},
    booktitle = {Proceedings of the Second Annual {ACM SIGMM} Conference on Multimedia Systems ({MMSys})},
    year = {2011},
    address = {New York, NY, USA},
    editor = {Mayer-Patel, Ketan and Begen, Ali},
    month = {feb},
    pages = {271--276},
    publisher = {ACM},
    abstract = {In this paper, we present a multimedia test-bed enabling session mobility in the context of the emerging ISO/IEC MPEG standard, Dynamic Adaptive Streaming over HTTP (DASH). In general, session mobility is defined as the transfer of a running streaming session from one device to another device where it may need to be consumed in an adaptive way. The two main challenges are: (1) taking into account the new context of the device (e.g., capabilities) to which the session is transferred and (2) performing the actual transfer in a seamless and interoperable way. Our system addresses both challenges supported by a prototype implementation integrated into VLC. In anticipation of the results we can conclude that interoperability is achieved adopting existing standards while the performance of the system does not depend on these standards. That is, the modules responsible for the performance are usually not defined within such standards and left out for competition. However, our system is designed in an extensible way and is able to accommodate this fact.},
    language = {EN},
    location = {San Jose, CA, USA},
    pdf = {http://www-itec.uni-klu.ac.at/bib/files/mueller_A_Test_Bed_for_DASH_featuring_Session_Mobility.pdf},
    talkdate = {2011.02.25},
    talktype = {registered}
    }