% Categories: MMC & Year: 2008
% Encoding: utf-8
@Article{Tusch2008,
  author = {Tusch, Roland and Jakab, Michael and Köpke, Julius and Krätschmer, Armin and Kropfberger, Michael and Kuchler, Sigrid and Ofner, Michael and Hellwagner, Hermann and Böszörmenyi, Laszlo},
  journal = {International Journal of Digital Multimedia Broadcasting},
  title = {Context-Aware UPnP-AV Services for Adaptive Home Multimedia Systems},
  year = {2008},
  month = sep,
  pages = {12},
  volume = {Vol. 2008},
  abstract = {One possibility to provide mobile multimedia in domestic multimedia systems is the use of Universal Plug and Play Audio Visual (UPnP-AV) devices. In a standard UPnP-AV scenario, multimedia content provided by a Media Server device is streamed to Media Renderer devices by the initiation of a Control Point. However, there is no provisioning of context-aware multimedia content customization. This paper presents an enhancement of standard UPnP-AV services for home multimedia environments regarding context awareness. It comes up with context profile definitions, shows how this context information can be queried from the Media Renderers, and illustrates how a Control Point can use this information to tailor a media stream from the Media Server to one or more Media Renderers. Moreover, since a standard Control Point implementation only queries one Media Server at a time, there is no global view on the content of all Media Servers in the UPnP-AV network. This paper also presents an approach of multimedia content integration on the Media Server side that provides fast search for content on the network. Finally, a number of performance measurements show the overhead costs of our enhancements to UPnP-AV in order to achieve the benefits.},
  address = {Cairo},
  doi = {doi:10.1155/2008/835438},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Context-Aware UPnP-AV Services for Adaptive Home Multimedia Systems.pdf},
  publisher = {Hindawi Publishing Corporation},
  url = {http://www.hindawi.com/journals/ijdmb/volume-2008/}
}
@InProceedings{Timmerer2008h,
  author = {Timmerer, Christian and Ransburg, Michael and Kofler, Ingo and Hellwagner, Hermann and Souto, Pedro and Andrade, Maria and Carvalho, Pedro and Castro, Helder and Sidibe, Mamadou and Mehaoua, Ahmed and Fang, Li and Lindsay, Adam and Mackay, Michael and Lugmayr, Artur and Feiten, Bernhard},
  booktitle = {Proceedings of the 2nd European Symposium on Mobile Media Delivery (EUMOB)},
  title = {An Integrated Management Supervisor for End-to-End Management of Heterogeneous Contents, Networks, and Terminals enabling Quality of Service},
  year = {2008},
  address = {New York, NY, USA},
  editor = {Frantti, Tapio and Huusko, Jyrki},
  month = jul,
  pages = {6},
  publisher = {ACM},
  series = {EUMOB},
  abstract = {End-to-end support for Quality of Service (QoS) has been broadly discussed in the literature. Many technologies have been proposed, each focusing on specific aspects for providing QoS guarantees to the end user. However, the integrated management of the end-to-end chain preserving QoS in heterogeneous environments is still a significant issue and insufficiently addressed to date. In this paper we propose an integrated management supervisor that takes into account the requirements from all stakeholders along the multimedia content delivery chain and provides an end-to-end management solution enabling QoS to the end user. This architecture and the subsystems that can be distributed along the end-to-end chain are detailed in this paper.},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/eumob2008enthrone.pdf},
  talktype = {none}
}
@Article{Timmerer2008g,
  author = {Timmerer, Christian and Hellwagner, Hermann},
  journal = {Informatik Spektrum},
  title = {Das MPEG-21 Multimedia Framework},
  year = {2008},
  month = dec,
  number = {6},
  pages = {576-579},
  volume = {31},
  address = {Berlin, Heidelberg, New York},
  language = {DE},
  publisher = {Springer}
}
@InProceedings{Timmerer2008f,
  author = {Timmerer, Christian and Andrade, Maria Teresa and Carvalho, Pedro and Rogai, Davide and Cordara, Giovanni},
  booktitle = {Proceedings of ACM Multimedia 2008 2nd International Workshop on the Many Faces of Multimedia Semantics},
  title = {The Semantics of MPEG-21 Digital Items Revisited},
  year = {2008},
  address = {New York, USA},
  editor = {Fotouhi, Farshad and Grosky, William I and Stanchev, Peter},
  month = oct,
  pages = {17-23},
  publisher = {ACM},
  abstract = {The MPEG-21 standard forms a comprehensive multimedia framework covering the entire multimedia distribution chain. In particular, it provides a flexible approach to represent, process, and transact complex multimedia objects which are referred to as Digital Items (DIs). DIs can be quite generic, independent of the application domain, and can encompass a diversity of media resources and metadata. This flexibility has an impact on the level of interoperability between systems and applications, since not all the functionality needs to be implemented. Furthermore, additional semantic rules may be implemented through the processing of the Digital Item which is possibly driven by proprietary metadata. This jeopardizes interoperability and consequently raises barriers to the successful achievement of augmented and transparent use of multimedia resources. In this context, we have investigated and evaluated the interoperability at the semantic level of Digital Items throughout the automated production, delivery and consumption of complex multimedia resources in heterogeneous environments. This paper describes the studies conducted, the experiments performed, and the conclusions reached towards that goal.},
  doi = {http://dx.doi.org/10.1145/1460676.1460681},
  isbn13 = {978-1-60558-316-7},
  keywords = {MPEG-21, Digital Items, Semantics, Evaluation, Metadata.},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/ms41754-timmerer-pre.pdf},
  talktype = {none}
}
@InCollection{Timmerer2008e,
  author = {Timmerer, Christian and Hellwagner, Hermann},
  booktitle = {Encyclopedia of Multimedia},
  publisher = {Springer},
  title = {MPEG-21 Multimedia Framework},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  edition = {2},
  editor = {Furht, Borko},
  month = oct,
  pages = {463-469},
  isbn10 = {0387747249},
  isbn13 = {978-0387747248},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Encyclopedia_MM_M21_pre.pdf}
}
@InCollection{Timmerer2008d,
  author = {Timmerer, Christian and Vetro, Anthony and Hellwagner, Hermann},
  booktitle = {Encyclopedia of Multimedia},
  publisher = {Springer},
  title = {MPEG-21 Digital Item Adaptation},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  edition = {2},
  editor = {Furht, Borko},
  month = oct,
  pages = {457-463},
  isbn10 = {0387747249},
  isbn13 = {978-0387747248},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Encyclopedia_MM_M21_DIA_pre.pdf}
}
@InCollection{Timmerer2008c,
  author = {Timmerer, Christian},
  booktitle = {Encyclopedia of Multimedia},
  publisher = {Springer},
  title = {Multimedia Adaptation Decision-Taking},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  editor = {Furht, Borko},
  month = oct,
  pages = {485-487},
  abstract = {Multimedia adaptation decision-taking is referred to as the process of finding the optimal parameter settings for (multiple, possibly in series connected) multimedia content adaptation engines given the properties, characteristics, and capabilities of the content and the context in which it will be processed.},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Encyclopedia_MM_ADT_pre.pdf}
}
@InCollection{Timmerer2008b,
  author = {Timmerer, Christian and Ransburg, Michael and Hellwagner, Hermann},
  booktitle = {Encyclopedia of Multimedia},
  publisher = {Springer},
  title = {Generic Multimedia Content Adaptation},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  edition = {2},
  editor = {Furht, Borko},
  month = oct,
  pages = {263-271},
  isbn10 = {0387747249},
  isbn13 = {978-0387747248},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Encyclopedia_MM_gBSD_pre.pdf}
}
@Book{Timmerer2008,
  author = {Timmerer, Christian},
  publisher = {VDM Verlag Dr. Müller},
  title = {Generic adaptation of scalable multimedia resources},
  year = {2008},
  address = {Saarbrücken, Germany},
  month = {jan},
  language = {EN},
  pages = {162}
}
@Article{Sidibe2008,
  author = {Sidibe, Mamadou and Koumaras, Harilaos and Kofler, Ingo and Mehaoua, Ahmed and Kourtis, Anastasios and Timmerer, Christian},
  journal = {Journal on Signal, Image and Video Processing},
  title = {A novel monitoring architecture for media services adaptation based on network QoS to perceived QoS mapping},
  year = {2008},
  month = dec,
  number = {4},
  pages = {307-320},
  volume = {2},
  abstract = {One of the future visions of multimedia networking is the provision of multimedia content at a variety of quality and price levels. Of the many approaches to this issue, one of the most predominant techniques is the concept of Perceived Quality of Service (PQoS), which extends the traditional engineering-based QoS concept to the perceptual satisfaction that the user receives from the reception of multimedia content. In this context, PQoS monitoring is becoming crucial to media service providers (SPs) for providing not only quantified PQoS-based services, but also service assurance based on multimedia content adaptation across heterogeneous networks. This work proposes a novel cross-layer monitoring architecture that utilizes a new Network QoS (NQoS) to PQoS mapping framework at the application level. The resulting QoS monitoring should allow the content delivery system to take sophisticated actions for real time media content adaptation, and aims to provide perceived service performance verification with respect to the QoS guarantees that have been specified in contractual agreements between providers and end-users. A subsequent performance evaluation of the proposed model conducted using a real test-bed environment demonstrates both the accuracy and feasibility of the network level measurements, the NQoS to PQoS mapping and the overall feasibility of the proposed end-to-end monitoring solution.},
  address = {London, United Kingdom},
  doi = {10.1007/s11760-008-0083-2},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/SIVP08_MonitoringArchitecture_Preprint.pdf},
  publisher = {Springer}
}
@Article{Reiterer2008,
  author = {Reiterer, Bernhard and Concolato, Cyril and Lachner, Janine and Le Feuvre, Jean and Moissinac, Jean-Claude and Lenzi, Stefano and Chessa, Stefano and Ferrá, Enrique Fernández and Menaya, Juan José González and Hellwagner, Hermann},
  journal = {The Visual Computer, International Journal of Computer Graphics},
  title = {User-centric universal multimedia access in home networks},
  year = {2008},
  issn = {01782789},
  month = jul,
  number = {7-9},
  pages = {837-845},
  volume = {24},
  abstract = {Much research is currently being conducted towards Universal Multimedia Access, aiming at removing barriers that arise when multimedia content is to be consumed with more and more heterogeneous devices and over diverse networks. We argue that users should be put at the center of the research work to enable user-centric multimedia access. In this paper we present the requirements for a user-centric multimedia access system in a networked home environment. These requirements are easy access to available content repositories, context awareness, content adaptation and session migration. After showing the limits of state-of-the-art technologies, we present the architecture of a system which allows unified access to the home network content, automatically delivered to rendering devices close to the user, adapted according to the rendering device constraints, and which is also capable of session mobility.},
  address = {Berlin, Heidelberg, New York},
  doi = {10.1007/s00371-008-0265-5},
  keywords = {Universal Multimedia Access · Multimedia adaptation · UPnP AV · Context awareness · Content sharing},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/User-centric universal multimedia access in home networks.pdf},
  publisher = {Springer},
  url = {http://http://www.springerlink.com/content/fpjj19237704788k/}
}
@InProceedings{Ransburg2008a,
  author = {Ransburg, Michael and Gressl, Hubert and Hellwagner, Hermann},
  booktitle = {2008 Ninth International Workshop on Image Analysis for Multimedia Interactive Services},
  title = {Efficient Transformation of MPEG-21 Metadata for Codec-agnostic Adaptation in Real-time Streaming Scenarios},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {Hellwagner, Hermann and Timmerer, Christian},
  month = apr,
  pages = {143-146},
  publisher = {IEEE},
  abstract = {Scalable media contents, such as the new MPEG-4 Scalable Video Codec enable to easily retrieve different qualities of the media content by simply disregarding certain media segments. The MPEG-21-based codec-agnostic adaptation approach supports this concept by introducing an XMLbased Bitstream Syntax Description (BSD) which describes the different segments of a media content. Based on this BSD, an adaptation node can intelligently adapt any scalable media (i.e., remove specific media segments) without the need for codec-specific knowledge. The adaptation approach consists of 1) transforming this BSD and 2) adapting the media based on the transformed BSD. In this paper, we focus on the BSD transformation step and evaluate different mechanisms w.r.t. their transformation efficiency given several application scenarios. In particular, we compare the traditional stylesheet-based mechanisms with a novel mechanism based on regular expressions. We discuss both mechanisms in terms of their expressiveness, and propose how to actually employ regular expressions for codec-agnostic adaptation. Finally, we quantitatively evaluate these mechanisms in different adaptation scenarios, which vary in the size and number of required BSD units},
  isbn13 = {9780769531304},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Efficient Transformation of MPEG-21 Metadata for Codec-agnostic Adaptation.pdf},
  talktype = {none},
  url = {http://www2.computer.org/portal/web/csdl/abs/proceedings/wiamis/2008/3130/00/3130toc.htm}
}
@InProceedings{Ransburg2008,
  author = {Ransburg, Michael and Timmerer, Christian and Hellwagner, Hermann},
  booktitle = {Multimedia Semantics: The role of Metadata},
  title = {Dynamic and Distributed Multimedia Content Adaptation based on the MPEG-21 Multimedia Framework},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  editor = {Lux, Mathias and Granitzer, Michael and Spaniol, Marc},
  month = feb,
  pages = {3-24},
  publisher = {Springer},
  abstract = {Today, there are many technologies in place to establish an infrastructure for the delivery and consumption of multimedia content. In practice, however, several elements of such an infrastructure are often stand-alone systems and a big picture of how these elements relate to each other or even fit together is not available. Therefore, MPEG-21 aims to provide an open framework for interoperable multimedia delivery and consumption. This requirement for interoperability results in a great diversity of XML-based metadata, which describes the media data on semantic or syntactic levels, in order to make it more accessible to the user. This metadata can be of considerable size, which leads to problems in streaming scenarios. Other than media data, XML metadata has no concept of samples, thus inhibiting streamed (and timed) processing, which is natural for media data. In order to address the challenges and requirements resulting from this situation, the concept of streaming instructions is introduced. These streaming instructions facilitate the fragmentation of content-related metadata, the association of media and metadata fragments with each other, and the synchronized streaming and processing of those fragments. Based on these capabilities, a dynamic and distributed multimedia content adaptation framework can be built.},
  doi = {10.1007/978-3-540-77473-0_1},
  isbn10 = {3540774726},
  isbn13 = {978-3540774723},
  language = {EN},
  talktype = {none}
}
@InProceedings{Quaritsch2008,
  author = {Quaritsch, Markus and Stojanovski, Emil and Bettstetter, Christian and Friedrich, Gerhard and Hellwagner, Hermann and Rinner, Bernhard and Hofbaur, Michael and Shah, Mubarak},
  booktitle = {Proceedings of the Second International Conference on Autonomic Computing and Communication Systems},
  title = {Collaborative Microdrones: Applications and Research Challenges},
  year = {2008},
  address = {New York, NY, USA},
  editor = {ACM,},
  month = jul,
  pages = {7},
  publisher = {ACM Press},
  abstract = {Microdrones are small-scale unmanned aerial vehicles (UAVs) carrying payloads such as cameras and sensors. Such microdrones enable us to obtain a bird's eye view of the environment which is helpful in many applications such as environmental monitoring, surveillance or disaster management. This position paper reports on our recently launched project \collaborative microdrones" where we are developing a system for aerial imaging based on cooperating, wireless networked microdrones that can be used in disaster management applications. Several microdrones will y in formation over the area of interest and deliver sensor data which is fused, analyzed and delivered to the user in real-time. In this paper we brie y discuss applications for UAVs, present related projects, introduce our research focus and report on preliminary results.},
  keywords = {microdrones, networked autonomous systems, mission planning, aerial imaging, formation flight},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Collaborative Microdrones.pdf},
  talktype = {none},
  url = {http://www.pervasive.uni-klu.ac.at/publications/pdf/Quaritsch_Autonomics2008.pdf}
}
@InProceedings{Prangl2008a,
  author = {Prangl, Martin and Kofler, Ingo and Hellwagner, Hermann},
  booktitle = {Proceedings of the 4th International Conference on Networking and Services (ICNS)},
  title = {Towards QoS Improvements of TCP-based Media Delivery},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {Bi, Jun and Chin, Kim and Dini, Cosmin and Lehmann, Leo and Pheanis, David C},
  month = mar,
  pages = {188-193},
  publisher = {IEEE},
  series = {ICNS},
  abstract = {The amount of audiovisual data available on the Internet and thus of multimedia communication over today's networks is increasing at a rapid pace. Despite the availability of specific media transport protocols like RTP, most content providers make use of the well-established and reliable TCP protocol to deliver audiovisual content over the Internet. The reason is that TCP-based data delivery in general is much less complicated for the clients to be served and over today's networks traversed (including proxies and firewalls), than making use of UDP-based RTP connections. However, in case of network bandwidth fluctuations and packet losses, TCP-based media delivery may lead to annoying jerky playback at the client side, due to retransmissions and late arrival of media data. This papers deals with TCP-based perceptual QoS improvement mechanisms for increasing the media experience for the consumer under unstable network conditions. Our approach is based on media content adaptation (transcoding) to fit the actual network bandwidth continuously monitored by the sender. The proposed mechanisms are applied at the application level at the server side, leaving the existing TCP implementation untouched and therefore enabling transparent use of existing media players. An evaluation of a realistic use case is presented which underlines the efficency of our approach.},
  doi = {10.1109/ICNS.2008.10},
  isbn13 = {978-0-7695-3094-9},
  language = {EN},
  location = {Gosier, Guadaloupe},
  pdf = {https://www.itec.aau.at/bib/files/prangl-tQosTcpMediaDelivery.pdf},
  talkdate = {2008.03.19},
  talktype = {registered}
}
@InProceedings{Prangl2008,
  author = {Prangl, Martin and Kofler, Ingo and Hellwagner, Hermann},
  booktitle = {Proceedings of the 1st International Conference on Ambient Media and Systems (Ambi-sys)},
  title = {An MPEG-21-driven Utility-based Multimedia Adaptation Decision Taking Web Service},
  year = {2008},
  address = {Brussels, Belgium},
  editor = {Whitaker, Roger M and Liang, Ben},
  month = feb,
  pages = {8},
  publisher = {ICST},
  series = {Ambi-sys},
  abstract = {Supporting transparent delivery and convenient use of multimedia content across a wide range of networks and devices is still a challenging task within the multimedia research community; Universal Multimedia Access (UMA) is a vision that has been pursued for quite some time. In multimedia frameworks, content adaptation is the core concept to make progress toward this goal. Most media adaptation engines targeting UMA scale the content w.r.t. terminal capabilities and network resource constraints and do not sufficiently consider end user preferences or even the utility of the adapted content for the user. Based on our previous work and the support of the MPEG-21 framework, we present a transparent solution to provide a content utility-aware adaptation decision for such utility-unaware multimedia frameworks. The idea is to outsource the challenging utility-aware adaptation decision taking task, which takes many factors into consideration and leads to a complex optimization problem. A realistic use case is adopted to show how related external multimedia frameworks can easily integrate and use our proposed adaptation decision taking Web Service.},
  isbn13 = {978-963-9799-16-5},
  language = {EN},
  location = {Quebec, Canada},
  pdf = {https://www.itec.aau.at/bib/files/ADTService-final.pdf},
  talkdate = {2008.02.12},
  talktype = {registered}
}
@Article{Mylonas2008,
  author = {Mylonas, Phivos and Hellwagner, Hermann and Castells, Pablo and Wallace, Manolis},
  journal = {Signal, Image and Video Processing},
  title = {Signal, image and video processing (SIVP) special issue on “multimedia semantics, adaptation and personalization” Editorial},
  year = {2008},
  issn = {1863-1711},
  month = oct,
  number = {4},
  pages = {287-288},
  volume = {2/2008},
  address = {Berlin, Heidelberg, New York},
  language = {EN},
  publisher = {Springer},
  url = {http://www.springerlink.com/content/f672w10742502436/?p=d30247019a4d4df6a6c1ea2a5da5e38d&pi=0}
}
@InProceedings{Mackay2008,
  author = {Mackay, Michael and Hutchison, David and Ransburg, Michael and Hellwagner, Hermann},
  booktitle = {2008 Ninth International Workshop on Image Analysis for Multimedia Interactive Services},
  title = {Combined Adaptation and Caching of MPEG-4 SVC in Streaming Scenarios},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {Hellwagner, Hermann and Timmerer, Christian},
  month = apr,
  pages = {101-104},
  publisher = {IEEE},
  abstract = {A key objective of the ENTHRONE II Project is the ability to optimise the delivery of multimedia content to a wide group of heterogeneous users. One example of this is in the cooperative deployment of adaptation and caching functionality in the edge network. This hybrid approach makes it possible not only to store content locally, thus minimising the cost incurred through subsequent requests, but also to better serve heterogeneous groups of users by dynamically adapting the content to suit a wide range of terminal devices. In this paper, we describe and evaluate how the cooperative deployment of MPEG-21-based adaptation and caching of MPEG-4 SVC can result in improvements both in the quality of the content received at the user terminal and the resources consumed during the delivery},
  isbn13 = {9780769531304},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Combined Adaptation and Caching of MPEG-4 SVC in Streaming Scenarios.pdf},
  talktype = {none},
  url = {http://www2.computer.org/portal/web/csdl/abs/proceedings/wiamis/2008/3130/00/3130toc.htm}
}
@InProceedings{Lopez2008,
  author = {López, Fernando and Jannach, Dietmar and Martínez, José M and Timmerer, Christian and Hellwagner, Hermann and García, Narciso},
  booktitle = {2008 Ninth International Workshop on Image Analysis for Multimedia Interactive Services},
  title = {Multimedia Adaptation Decisions Modelled as Non-deterministic Operations},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {Hellwagner, Hermann and Timmerer, Christian},
  month = apr,
  pages = {46-49},
  publisher = {IEEE},
  abstract = {This paper describes how a multimedia adaptation framework can automatically decide the sequence of operations to be executed in order to adapt an MPEG-21 Digital Item to the MPEG-21 description of the usage environment in which it will be consumed. The main innovation of this work with respect to previous multimedia adaptation decision models is that in the proposed approach decisions can be made without knowing the exact behaviour of the operations that are going to be executed.},
  isbn13 = {9780769531304},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Multimedia Adaptation Decisions Modelled as Non-Deterministic Operations.pdf},
  talktype = {none},
  url = {http://www2.computer.org/portal/web/csdl/abs/proceedings/wiamis/2008/3130/00/3130toc.htm}
}
@InProceedings{Lachner2008,
  author = {Lachner, Janine and Hellwagner, Hermann},
  booktitle = {Information Systems and e-Business Technologies (Proc. 2nd International United Information Systems Conference, UNISCON 2008},
  title = {Information and Communication Systems for Mobile Emergency Response},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  editor = {Kaschek, Roland and Kop, Christian and Steinberger, Claudia and Fliedl, Günther},
  month = apr,
  pages = {213-224},
  publisher = {Springer},
  series = {LNBIP 5},
  abstract = {This discussion paper attempts to propose emergency response and disaster management as worthwhile areas of applied research for the informa-tion system community. The typical requirements, entities and activities in-volved in specifically mobile emergency response operations are summarized. Recent research contributions in this area are exemplarily reviewed in order to give a deeper insight into the role and use of mobile information and communi-cation systems. Finally, the major challenges and research needs regarding in-formation systems are summarized, with a view to draw the attention of infor-mation systems researchers to this interesting and important field.},
  edition = {1},
  isbn10 = {3540789413},
  isbn13 = {978-3540789413},
  keywords = {Emergency response, disaster management, information systems, mobile information and communication technology},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Information and Communication Systems for Mobile Emergency Response.pdf},
  talktype = {none}
}
@Article{Kuschnig2008,
  author = {Kuschnig, Robert and Kofler, Ingo and Ransburg, Michael and Hellwagner, Hermann},
  journal = {Journal of Visual Communication and Image Representation},
  title = {Design options and comparison of in-network H.264/SVC adaptation},
  year = {2008},
  month = dec,
  number = {8},
  pages = {529-542},
  volume = {19},
  abstract = {This paper explores design options and evaluates implementations of in-network, RTP/RTSP based adaptation MANEs (Media Aware Network Elements) for H.264/SVC content streaming. The obvious technique to be employed by such an adaptation MANE is to perform SVC specific bitstream extraction or truncation. Another mechanism that can be used is description (metadata) driven, coding format independent adaptation based on generic Bitstream Syntax Descriptions (gBSD), as specified within MPEG-21 Digital Item Adaptation (DIA). Adaptation MANE architectures for both approaches are developed and presented, implemented in end-to-end streaming/adaptation prototype systems, and experimentally evaluated and compared. For the gBSD based solution, open issues like the granularity of bitstream descriptions and of bitstream adaptation, metadata overhead, metadata packetization and transport options, and error resilience in case of metadata losses, are addressed. The experimental results indicate that a simple SVC specific adaptation MANE does clearly outperform the gBSD based adaptation variants. Yet, the conceptual advantages of the description driven approach, like coding format independence and flexibility, may outweigh the performance drawbacks in specific applications.},
  address = {Amsterdam},
  doi = {10.1016/j.jvcir.2008.07.004},
  keywords = {Scalable video coding (H.264/SVC), In-network adaptation, RTP/RTSP MANE, MPEG-21 Digital Item Adaptation (DIA), Generic Bitstream Syntax Description (gBSD)},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/JVCIR08_In-network_H.264-AVC_Adaptation.pdf},
  publisher = {Elsevier B.V.}
}
@InCollection{Kofler2008b,
  author = {Kofler, Ingo and Timmerer, Christian and Hellwagner, Hermann},
  booktitle = {Encyclopedia of Multimedia},
  publisher = {Springer},
  title = {Optimization-based Multimedia Adaptation Decision-Taking},
  year = {2008},
  address = {New York, USA},
  edition = {2},
  editor = {Furht, Borko},
  month = oct,
  pages = {699-704},
  doi = {10.1007/978-0-387-78414-4_59},
  isbn10 = {0387747249},
  isbn13 = {978-0387747248},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Encyclopedia_MM_OPT-ADTE_pre.pdf}
}
@Article{Kofler2008a,
  author = {Kofler, Ingo and Seidl, Joachim and Timmerer, Christian and Hellwagner, Hermann and Ahmed, Toufik},
  journal = {Journal on Signal, Image and Video Processing},
  title = {Using MPEG-21 for Cross-layer Multimedia Content Adaptation},
  year = {2008},
  month = dec,
  number = {4},
  pages = {355-370},
  volume = {2},
  abstract = {This paper presents a cross-layer model—formulated using interoperable description formats—for the adaptation of scalable H.264/MPEG-4 AVC (i.e., SVC) content in a video streaming system operating on aWireless LANaccess network without QoS mechanisms.SVCcontent adaptation on the server takes place on the application layer using an adaptation process compliant with the MPEG-21 Digital Item Adaptation (DIA) standard, based on input comprised of MPEG-21 DIA descriptions of content and usage environment parameters. The latter descriptions integrate information from different layers, e.g., device characteristics and packet loss rate, in an attempt to increase the interoperability of this cross-layer model, thus making it applicable to other models. For the sake of deriving model parameters, performance measurements from two wireless access point models were taken in account. Throughout the investigation it emerged that the behavior of the system strongly depends on the access point. Therefore, we investigated the use of end-to-end-based rate control algorithms for steering the content adaptation. Simulations of rate adaptation algorithms were subsequently performed, leading to the conclusion that a TFRC-based adaptation technique (TCP-Friendly Rate Control) performs quite well in adapting to limited bandwidth and varying network conditions. In the paper we demonstrate howTFRC-based content adaptation can be realized using MPEG-21 tools.},
  address = {London, United Kingdom},
  doi = {10.1007/s11760-008-0088-x},
  keywords = {Multimedia content adaptation · Cross-layer design · MPEG-21 Digital Item Adaptation · Rate control},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/SIVP08_CrossLayer_Preprint.pdf},
  publisher = {Springer}
}
@InProceedings{Kofler2008,
  author = {Kofler, Ingo and Prangl, Martin and Kuschnig, Robert and Hellwagner, Hermann},
  booktitle = {Proceedings of the 18th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV)},
  title = {An H.264/SVC-based Adaptation Proxy on a WiFi Router},
  year = {2008},
  address = {New York, NY, USA},
  editor = {Wolf, Lars and Griwodz, Carsten},
  month = may,
  pages = {63-68},
  publisher = {ACM},
  series = {NOSSDAV},
  abstract = {Recent advances in video coding technology like the scalable extension of the MPEG-4 AVC/H.264 video coding standard pave the way for computationally cheap adaptation of video content. In this paper we present our work on a lightweight RTSP/RTP proxy that enables in-network stream processing. Based on an off-the-shelf wireless router that runs a Linux-based firmware we demonstrate that the video adaptation can be performed on-the-fly directly on a network device. The paper covers design and implementation details of the proxy as well as a discussion about the actual adaptation of the SVC stream. Based on experimental evaluations we show that our approach can handle a reasonable number of concurrent sessions for a typical home deployment scenario. Furthermore, the paper covers possible applications in which adaptation on the network device can be beneficial.},
  doi = {10.1145/1496046.1496061},
  keywords = {Multimedia adaptation, in-network adaptation, RTSP, RTP, H.264, scalable video coding},
  language = {EN},
  location = {Braunschweig, Germany},
  pdf = {https://www.itec.aau.at/bib/files/NOSSDAV08_AdaptationProxyRouter-preprint.pdf},
  talkdate = {2009.05.29},
  talktype = {registered}
}
@InProceedings{Koepke2008,
  author = {Köpke, Julius and Tusch, Roland and Hellwagner, Hermann and Böszörmenyi, Laszlo},
  booktitle = {Proceedings of the International Conference on Signal Processing and Multimedia Applications},
  title = {Context-aware hoarding of Multimedia Content in a large-scale Tour Guide Scenario},
  year = {2008},
  address = {Setubal},
  editor = {Assunção, Pedro and Faria, Sérgio},
  month = jul,
  pages = {15-23},
  publisher = {INSTICC Press},
  issn = {9789898111609},
  language = {EN},
  talktype = {none},
  url = {http://www.sigmap.org}
}
@InCollection{Jannach2008,
  author = {Jannach, Dietmar and Timmerer, Christian and Hellwagner, Hermann},
  booktitle = {Encyclopedia of Multimedia},
  publisher = {Springer},
  title = {Knowledge-based Multimedia Adaptation Decision-Taking},
  year = {2008},
  address = {Berlin, Heidelberg, New York},
  edition = {2},
  editor = {Furht, Borko},
  month = oct,
  pages = {391-394},
  isbn10 = {0387747249},
  isbn13 = {978-0387747248},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Encyclopedia_MM_AI-ADTE_pre.pdf}
}
@InProceedings{Hellwagner2008,
  author = {Hellwagner, Hermann},
  booktitle = {Advances in Multiagent Systems, Robotics and Cybernetics: Theory and Practice (Volume II)},
  title = {Challenges toward Adaptive Behavior of Distributed Multimedia Systems},
  year = {2008},
  address = {Tecumseh},
  editor = {Lasker, George E and Pfalzgraf, Jochen},
  month = jul,
  pages = {15-19},
  publisher = {The International Institute for Advanced Studies in Systems Research and Cybernetics},
  series = {Proceedings of the Symposium on Multiagent Systems, Robotocs and Cybernetics Inter-Symp-2007},
  abstract = {The multimedia community is pursuing, among others, the vision of Universal Multimedia Access (UMA). UMA denotes the concept that any multimedia content should be available anywhere, anytime, on any device, tailored to the user's needs and preferences, accessible for the user in a transparent and convenient way. Key to achieving this vision is to realize collaborative adaptive behavior of the involved distributed multi-media system components (server, media-aware net-work elements like proxies or gateways, and clients), based on intense metadata exchange and multimedia content negotiation, adaptation, or personalization. This paper outlines the key challenges and the state of the art in achieving such adaptive behavior. The major challenges have been tackled recently and many of the building blocks of UMA have become or are becoming available from standardization groups, which are instrumental in this area to ensure interop-erable use of the media and metadata items. However, making use of these standards in practical multimedia systems raises additional issues, both of conceptual nature and in terms of implementation. Based on years of contributions to ISO/IEC MPEG standardization efforts and of research work into adaptive multimedia systems, we will give an overview of these challenges, discuss the state of the art, and introduce an emerging principled solution for format-independent multimedia content adaptation.},
  edition = {Vol. II},
  isbn13 = {9781897233610},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/InterSymp_2007_HH_Adaptive_Behavior_DMS.pdf},
  talktype = {none}
}
@InProceedings{Eberhard2008c,
  author = {Eberhard, Michael and Celetto, Luca and Timmerer, Christian and Quacchio, Emanuele and Hellwagner, Hermann},
  booktitle = {STreaming Day'08 Proceedings},
  title = {An Interoperable Streaming Framework for Scalable Video Coding based on MPEG-21},
  year = {2008},
  address = {Parma},
  editor = {Fanucci, Luca and Rovati, Fabrizio and Timmerer, Christian},
  month = {sep},
  pages = {4},
  publisher = {University of Parma},
  abstract = {In this paper, an interoperable streaming framework for the adaptation and streaming of scalable multimedia content is presented. The streaming framework’s architecture for Video on Demand (VoD) as well as multicast streaming is presented. The VoD test-bed allows each client to set up a separate streaming session and receive the bitstreams in a quality tailored to the clients requirements, while the multicast test-bed provides a layered scalable multicast to all clients and every client needs to decide which layers to subscribe to. After the description of the architectures, a comparison in terms of performance of the MPEG-21 DIA metadata-based adaptation approach to an SVC-specific adaptation approach is presented. Furthermore, optimizations for both adaptation approaches are presented and the performance improvements due to the optimizations are discussed.},
  issn = {9781607029373},
  language = {EN},
  location = {Parma, Italy},
  pdf = {https://www.itec.aau.at/bib/files/Streaming Day'08_Eberhard_StreamingFramework_Paper.pdf},
  talkdate = {2008.09.02},
  talktype = {registered}
}
@InProceedings{Eberhard2008b,
  author = {Eberhard, Michael and Celetto, Luca and Timmerer, Christian and Quacchio, Emanuele and Hellwagner, Hermann and Rovati, Fabrizio S},
  booktitle = {Proceedings of the 5th IET Visual Information Engineering Conference Conference (VIE’08)},
  title = {An Interoperable Streaming Framework for Scalable Video Coding based on MPEG-21},
  year = {2008},
  address = {London},
  editor = {Izquierdo, Ebroul and Liu, Guizhong},
  month = {jul},
  pages = {723-728},
  publisher = {IET},
  abstract = {This paper presents an interoperable framework for the streaming of scalable multimedia content such as Scalable Video Coding (SVC). In particular, the framework’s architecture for both, Video on Demand (VoD) and multicast streaming, is presented. The architecture includes a detailed description of the adaptation engine – conforming to MPEG-21 Digital Item Adaptation – as well as the integration of the adaptation engine into VideoLAN’s VLC media player, which provides the streaming server and client for the framework. Following the description of the architecture, a comparison in terms of performance of the generic MPEG-21 DIA-based adaptation approach, which is utilized by the described demo, versus an SVC-specific adaptation approach is presented and possible further improvements for both approaches are investigated.},
  isbn13 = {978-0-86341-914-0},
  issn = {0537-9989},
  keywords = {Adaptation, MPEG-21 Digital Item Adaptation, Multicasting, Scalable Video Coding, Video on Demand},
  language = {EN},
  location = {Xi'an, China},
  pdf = {https://www.itec.aau.at/bib/files/VIE08_Eberhard.pdf},
  talkdate = {2008.07.29},
  talktype = {registered}
}
@InProceedings{Eberhard2008a,
  author = {Eberhard, Michael and Celetto, Luca and Timmerer, Christian and Quacchio, Emanuele and Hellwagner, Hermann and Rovati, Fabrizio S},
  booktitle = {Proceedings of the IEEE International Conference on Multimedia and Expo 2008 (ICME’08)},
  title = {An Interoperable Multimedia Delivery Framework for Scalable Video Coding based on MPEG-21 Digital Item Adaptation},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {Ostermann, Jörn and Ebrahimi, Touradj},
  month = {jun},
  pages = {1607-1608},
  publisher = {IEEE},
  abstract = {In this paper we present an interoperable multimedia delivery framework for scalable video coding based on MPEG-21 Digital Item Adaptation (DIA). In can be used to transmit scalable video contents within heterogeneous usage environments where the properties of the usage environment (e.g., terminal/network capabilities) may change dynamically during the streaming session. The usage environment is signaled by interoperable description formats provided by the DIA standard. Additionally, the adaptation itself is done by exploiting the standard's generic adaptation approach, i.e., independent of the actual coding format. Thus, the overall framework is also applicable for other scalable coding formats.},
  issn = {9781424425709},
  language = {EN},
  location = {Hannover, Germany},
  pdf = {https://www.itec.aau.at/bib/files/ICME08_Eberhard.pdf},
  talkdate = {2008.06.25},
  talktype = {poster}
}
@InProceedings{Eberhard2008,
  author = {Eberhard, Michael and Celetto, Luca and Timmerer, Christian and Quacchio, Emanuele and Hellwagner, Hermann},
  booktitle = {2008 Ninth International Workshop on Image Analysis for Multimedia Interactive Services},
  title = {Performance Analysis of Scalable Video Adaptation: Generic versus Specific Approach},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {Hellwagner, Hermann and Timmerer, Christian},
  month = {may},
  pages = {43-50},
  publisher = {IEEE},
  abstract = {This paper provides a performance analysis of adaptation approaches designed for scalable media resources. In particular, we investigate the streaming of media resources compliant to the Scalable Video Coding (SVC) extensions of Advanced Video Coding (AVC)within heterogeneous environments, i.e., terminals and networks with different capabilities. Therefore, we have developed a test-bed in order to analyze two different approaches for the adaptation of scalable media resources, namely a generic approach that is applicable independently of the actual scalable coding format used and a specific approach especially built for SVC.The results show that if adaptation is required the generic approach clearly outperforms the approach specifically built for SVC},
  isbn10 = {076953130X},
  isbn13 = {978-0769531304},
  language = {EN},
  location = {Klagenfurt, Austria},
  pdf = {https://www.itec.aau.at/bib/files/wiamis08_eberhard.pdf},
  talkdate = {2008.05.09},
  talktype = {registered}
}
@InProceedings{Bolla2008,
  author = {Bolla, Raffaele and Repetto, Matteo and Chessa, Stefano and Furfari, Francecso and Zutter, Saar De and Walle, Rik Van de and Reiterer, Bernhard and Hellwagner, Hermann and Asbach, Mark and Wien, Mathias},
  booktitle = {13th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA08)},
  title = {A Context-Aware Architecture for QoS and Transcoding Management of Multimedia Streams in Smart Homes},
  year = {2008},
  address = {Los Alamitos, CA, USA},
  editor = {IEEE, Industrial Electronics Society},
  month = sep,
  pages = {1354-1361},
  publisher = {IEEE},
  abstract = {Current trends in smart homes suggest that several multimedia services will soon converge towards common standards and platforms. However this rapid evolution gives rise to several issues related to the management of a large number of multimedia streams in the home communication infrastructure. An issue of particular relevance is how a context acquisition system can be used to support the management of such a large number of streams with respect to the Quality of Service (QoS), to their adaptation to the available bandwidth or to the capacity of the involved devices, and to their migration and adaptation driven by the users' needs that are implicitly or explicitly notified to the system. Under this scenario this paper describes the experience of the INTERMEDIA project in the exploitation of context information to support QoS, migration, and adaptation of multimedia streams.},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/04638575.pdf},
  talktype = {none}
}