% Year: 2013 % Encoding: utf-8 @Article{raey, author = {Stegmaier, Florian and Kosch, Harald and Klamma, Ralf and Lux, Mathias and Damiani, Ernesto}, journal = {Multimedia Tools and Applications}, title = {Multimedia on the web - editorial}, year = {2013}, issn = {1380-7501}, month = {jan}, pages = {1-6}, address = {New York, USA}, doi = {10.1007/s11042-013-1729-9}, language = {English}, publisher = {Springer US}, url = {http://dx.doi.org/10.1007/s11042-013-1729-9} } @Article{lux2013visual, author = {Lux, Mathias and Marques, Oge}, journal = {Synthesis Lectures on Information Concepts, Retrieval, and Services}, title = {Visual Information Retrieval Using Java and LIRE}, year = {2013}, month = {jan}, number = {1}, pages = {1-112 pp.}, volume = {5}, abstract = {Visual information retrieval (VIR) is an active and vibrant research area, which attempts at providing means for organizing, indexing, annotating, and retrieving visual information (images and videos) from large, unstructured repositories. The goal of VIR is to retrieve matches ranked by their relevance to a given query, which is often expressed as an example image and/or a series of keywords. During its early years (1995-2000), the research efforts were dominated by content-based approaches contributed primarily by the image and video processing community. During the past decade, it was widely recognized that the challenges imposed by the lack of coincidence between an image's visual contents and its semantic interpretation, also known as semantic gap, required a clever use of textual metadata (in addition to information extracted from the image's pixel contents) to make image and video retrieval solutions efficient and effective. The need to bridge (or at least narrow) the semantic gap has been one of the driving forces behind current VIR research. Additionally, other related research problems and market opportunities have started to emerge, offering a broad range of exciting problems for computer scientists and engineers to work on. In this introductory book, we focus on a subset of VIR problems where the media consists of images, and the indexing and retrieval methods are based on the pixel contents of those images -- an approach known as content-based image retrieval (CBIR). We present an implementation-oriented overview of CBIR concepts, techniques, algorithms, and figures of merit. Most chapters are supported by examples written in Java, using Lucene (an open-source Java-based indexing and search implementation) and LIRE (Lucene Image REtrieval), an open-source Java-based library for CBIR.}, address = {USA}, doi = {10.2200/S00468ED1V01Y201301ICR025}, language = {EN}, publisher = {Morgan \& Claypool Publishers} } @InCollection{hellwagner2013, author = {Hellwagner, Hermann}, booktitle = {Media and Convergence Management}, publisher = {Springer}, title = {The Interplay of Technology Development and Media Convergence: Examples}, year = {2013}, address = {Berlin, Heidelberg, New York}, editor = {Diehl, Sandra and Karmasin, Matthias}, month = {apr}, pages = {205-220}, language = {EN}, pdf = {https://www.itec.aau.at/bib/files/14_Hellwagner_Electronic_Version.pdf} } @Article{delfabro_mmsj2013, author = {Del Fabro, Manfred and Böszörmenyi, Laszlo}, journal = {Multimedia Systems}, title = {State-of-the-art and future challenges in video scene detection: a survey}, year = {2013}, issn = {0942-4962}, month = {feb}, number = {5}, pages = {427-454}, volume = {19}, address = {Berlin, Heidelberg, New York}, language = {EN}, publisher = {Springer-Verlag} } @InProceedings{Zeppelzauer_MediaEval2013, author = {Zeppelzauer, Matthias and Zaharieva, Maia and Del Fabro, Manfred}, booktitle = {MediaEval 2013 - Multimedia Benchmark Workshop}, title = {Unsupervised Clustering of Social Events}, year = {2013}, address = {Aachen, Germany}, editor = {Larson, Martha and Anguera, Xavier and Reuter, Timo and Jones, Gareth and Ionescu, Bogdan and Schedl, Markus and Piatrik, Tomas and Hauff, Claudia and Soleymani, Mohammad}, month = {oct}, pages = {1--2}, publisher = {CEUR-WS.org/Vol-1043}, language = {EN}, location = {Barcelona, Spain}, pdf = {https://www.itec.aau.at/bib/files/mediaeval2013_submission_37.pdf}, talkdate = {2013.10.19}, talktype = {poster} } @InProceedings{Waltl2013_QoMEX2013_4DPlayer, author = {Waltl, Markus and Rainer, Benjamin and Lederer, Stefan and Timmerer, Christian and Gassner, Katharina and Terlutter, Ralf}, booktitle = {Proceedings of the 5th International Workshop on Quality of Multimedia Experience (QoMEX'13)}, title = {A 4D Multimedia Player enabling Sensory Experience}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Timmerer, Christian and Le Callet, Patrick and Varela, Martin and Winkler, Stefan and Falk, Tiago H}, month = {jul}, pages = {126-127}, publisher = {IEEE}, abstract = {Lately, 3D is gaining momentum in cinemas and home environments. However, 2D and 3D video content only stimulates senses like hearing and seeing. In this paper we focus on a more enhanced level of entertainment by presenting a 4D multimedia player and a corresponding demonstration setup, which stimulates further senses such as haptics using the MPEG-V: Media Context and Control standard. The presented demonstration setup uses stereoscopic 3D and sensory devices, i.e., fans, vibration panels and lights. The combination of conventional 3D content with tailored sensory effects allows us to further enhance the viewing experience of the users.}, isbn13 = {-}, keywords = {3D, 4D, Sensory Effects, Sensory Experience, MPEG-V}, language = {EN}, location = {Klagenfurt am Wörthersee, Austria}, pdf = {https://www.itec.aau.at/bib/files/QoMEX2013_4DPlayer.pdf}, talkdate = {2013.07.04}, talktype = {poster}, url = {http://www.qomex2013.org} } @PhdThesis{Waltl2013_PhD, author = {Waltl, Markus}, school = {Alpen-Adria-Universität Klagenfurt}, title = {The Impact of Sensory Effects on the Quality of Multimedia Experience}, year = {2013}, month = {feb}, abstract = {Multimedia content is omnipresent in our life. Thus, one can consume content through various distribution channels such as a DVD, Blu-Ray, or the Internet. Recently, 3D video gained more and more importance and a lot of movies presented in cinemas are 3D. Currently, research on additional constituents such as light and scent effects for further enhancing the viewing experience is conducted. As this research is taken up by more and more researchers and companies, the Moving Picture Experts Group (MPEG) ratified the MPEG-V standard, referred to as Media Context and Control, which allows the annotation of multimedia content with additional effects (e.g., light, wind, vibration) and render these effects synchronized to the multimedia content. Due to this fairly new research area, there are only a few subjective quality assessments evaluating such effects. Moreover, standardized assessment methods cannot be used as originally developed since they are optimized for audio-visual quality evaluations. Thus, this work lists and describes existing subjective quality assessment methods suitable for conducting assessments comprising multimedia content, especially videos, enriched by sensory effects (i.e., light, wind, and vibration). As there is a lack of suitable software for rendering sensory effects, this work introduces a multimedia player for playing multimedia content accompanied by sensory effects. Moreover, in this work, we performed four subjective quality assessments answering the following questions: (1) Do sensory effects enhance the viewing experience for different genres? (2) Do sensory effects have an influence on the perceived video quality? (3) Do light effects enhance the viewing experience for Web videos? (4) Do sensory effects have an impact on the perceived emotions while watching a video? Therefore, this work presents these subjective quality assessments including a detailed description of the assessments and their results. Moreover, this work introduces a dataset consisting of video sequences annotated with sensory effects for conducting subjective quality assessments. Finally, some recommendations for performing assessments comprising sensory effects which have been extracted from the conducted subjective quality assessments are given.}, language = {EN}, pages = {234}, pdf = {http://ubdocs.uni-klu.ac.at/open/hssvoll/AC10774907.pdf} } @Article{Waltl2012_MPEGVSI, author = {Waltl, Markus and Rainer, Benjamin and Timmerer, Christian and Hellwagner, Hermann}, journal = {Signal Processing: Image Communication}, title = {An End-to-End tool chain for sensory experience based on MPEG-V}, year = {2013}, month = {feb}, number = {2}, pages = {136--150}, volume = {28}, abstract = {This paper provides an overview of our research conducted in the area of Sensory Experience including our implementations using MPEG-V Part 3 entitled ”Sensory Information”. MPEG-V Part 3 introduces Sensory Experience as a tool to increase the Quality of Experience by annotating traditional multimedia data with sensory effects. These sensory effects are rendered on special devices like fans, vibration chairs, ambient lights, scent disposers, water sprayers, or heating/cooling devices stimulating senses beyond the traditional ones. The paper's main focus is on the end-to-end aspects including the generation, transmission, and synchronized rendering of sensory effects with the traditional multimedia data taking movie clips as an example. Therefore, we present in this paper an open source tool chain that provides a complete end-to-end sensory effect generation and consumption framework. Furthermore, we summarize results from various subjective quality assessments conducted in this area. Finally, we point out research challenges that may encourage further research within this emerging domain.}, address = {Amsterdam, Netherlands}, doi = {10.1016/j.image.2012.10.009}, keywords = {Quality of Experience; Sensory Experience; Subjective Quality Assessment; Experimental Results; MPEG-V; Annotation Tool; Simulation Tool; Web Browser Plug-in; Sensory Information}, language = {EN}, publisher = {Elsevier}, url = {http://dx.doi.org/10.1016/j.image.2012.10.009} } @InProceedings{Timmerer2013_QoMEX2013_UtilityModel, author = {Timmerer, Christian and Rainer, Benjamin and Markus, Waltl}, booktitle = {Proceedings of the 5th International Workshop on Quality of Multimedia Experience (QoMEX'13)}, title = {A Utility Model for Sensory Experience}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Timmerer, Christian and Le Callet, Patrick and Varela, Martin and Winkler, Stefan and Falk, Tiago H}, month = {jul}, pages = {224-229}, publisher = {IEEE}, abstract = {Enriching multimedia with additional effects such as olfaction, light, wind, or vibration is gaining more and more momentum in both research and industry. Hence, there is the need to determine the influence of individual effects on the Quality of Experience (QoE). In this paper, we present a subjective quality assessment using the MPEG-V standard to annotate video sequences with individual sensory effects (i.e., wind, light, and vibration) and all combinations thereof. Based on the results we derive a utility model for sensory experience that accounts for the assessed sensory effects. Finally, we provide an example instantiation of the utility model and validate it against current and past results of our subjective quality assessments conducted so far.}, isbn13 = {-}, keywords = {Quality of Multimedia Experience, Sensory Effects, MPEG-V, Sensory Experience, Utility Model}, language = {EN}, location = {Klagenfurt am Wörthersee, Austria}, pdf = {https://www.itec.aau.at/bib/files/QoMEX2013_UtilityModel.pdf}, talkdate = {2013.07.05}, talktype = {registered}, url = {http://www.qomex2013.org} } @Article{Timmerer2013_MPEGColumnSep, author = {Timmerer, Christian}, journal = {ACM SIGMultimedia Records}, title = {MPEG Column: 105th MPEG Meeting}, year = {2013}, issn = {1947-4598}, month = {sep}, number = {3}, pages = {1-2}, volume = {5}, address = {New York, NY, USA}, language = {EN}, publisher = {ACM}, url = {http://records.sigmm.ndlab.net/2013/08/mpeg-column-105th-mpeg-meeting/} } @Article{Timmerer2013_MPEGColumnMar, author = {Timmerer, Christian}, journal = {ACM SIGMultimedia Records}, title = {MPEG column: 103rd MPEG meeting}, year = {2013}, issn = {1947-4598}, month = {mar}, number = {1}, pages = {1-3}, volume = {5}, address = {New York, NY, USA}, language = {EN}, publisher = {ACM}, url = {http://records.sigmm.ndlab.net/2013/01/mpeg-column-103rd-mpeg-meeting/} } @Article{Timmerer2013_MPEGColumnDec, author = {Timmerer, Christian}, journal = {ACM SIGMultimedia Records}, title = {MPEG Column: 106th MPEG Meeting}, year = {2013}, issn = {1947-4598}, month = {dec}, number = {4}, pages = {1-2}, volume = {5}, address = {New York, NY, USA}, language = {EN}, publisher = {ACM}, url = {http://records.sigmm.ndlab.net/2014/01/mpeg-column-106th-mpeg-meeting/} } @Article{Timmerer2013_CN, author = {Timmerer, Christian and Vetro, Anthony}, journal = {Computing Now}, title = {Recent MPEG Standards for Future Media Ecosystems}, year = {2013}, month = {oct}, number = {10}, pages = {1}, volume = {6}, address = {Los Alamitos, CA, USA}, language = {EN}, publisher = {IEEE Computer Society [online]}, url = {http://www.computer.org/portal/web/computingnow/archive/october2013} } @InProceedings{Taschwer2013, author = {Taschwer, Mario}, booktitle = {{CLEF} 2013 Evaluation Labs and Workshop, Online Working Notes}, title = {Text-Based Medical Case Retrieval Using {MeSH} Ontology}, year = {2013}, address = {Padua, Italy}, editor = {Forner, Pamela and Navigli, Roberto and Tufis, Dan}, month = {sep}, pages = {5}, publisher = {CLEF Initiative}, abstract = {Our approach to the ImageCLEF medical case retrieval task consists of text-only retrieval combined with utilizing the Medical Subject Headings (MeSH) ontology. MeSH terms extracted from the query are used for query expansion or query term weighting. MeSH annotations of documents available from PubMed Central are added to the corpus. Retrieval results improve slightly upon full-text retrieval.}, isbn13 = {978-88-904810-5-5}, language = {EN}, location = {Valencia, Spain}, pdf = {https://www.itec.aau.at/bib/files/aau_mcr_mesh.pdf}, slides = {https://www.itec.aau.at/bib/files/poster_clef2013.pdf}, talkdate = {2013.09.24}, talktype = {poster}, url = {http://www.clef-initiative.eu/documents/71612/4b93fc08-a8fa-4985-873d-c2c18bd4cd3d} } @Article{Szkaliczki2013, author = {Szkaliczki, Tibor and Eberhard, Michael and Hellwagner, Hermann and Szobonya, László}, journal = {Discrete Applied Mathematics}, title = {Piece selection algorithms for layered video streaming in P2P networks}, year = {2013}, month = {nov}, pages = {11}, address = {Amsterdam, The Netherlands}, language = {EN}, publisher = {Elsevier}, url = {http://dx.doi.org/10.1016/j.dam.2013.11.007} } @InProceedings{Sieber2013, 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}, title = {Implementation and User-centric Comparison of a Novel Adaptation Logic for DASH with SVC}, 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 = {https://www.itec.aau.at/bib/files/06573184.pdf}, talktype = {none} } @Article{SchoeffmannIJMIR2013, author = {Schoeffmann, Klaus and Ahlström, David and Bailer, Werner and Cobarzan, Claudiu and Hopfgartner, Frank and McGuinness, Kevin and Gurrin, Cathal and Frisson, Christian and Le, Duy-Dinh and Del Fabro, Manfred and Bai, Hongliang and Weiss, Wolfgang}, journal = {International Journal of Multimedia Information Retrieval}, title = {The Video Browser Showdown: a live evaluation of interactive video search tools}, year = {2013}, month = {dec}, pages = {1-15}, address = {Berlin, Germany}, language = {EN}, publisher = {Springer} } @InProceedings{SchoeffmannAMR2011, author = {Schoeffmann, Klaus and Ahlström, David and Böszörmenyi, Laszlo}, booktitle = {Proceedings of the International Workshop on Adaptive Multimedia Retrieval (AMR2011), LNCS 7836}, title = {A User Study of Visual Search Performance of Interactive 2D and 3D Storyboards}, year = {2013}, address = {Barcelona, Spain}, editor = {Detyniecki, M and Garcia-Serrano, A and Nürnberger, A and Stober, S}, month = {jul}, pages = {18-32}, publisher = {Springer}, language = {EN}, location = {Berlin Heidelberg}, talkdate = {2011.7.15}, talktype = {registered} } @InProceedings{Schoeffmann2013, author = {Schoeffmann, Klaus and Cobarzan, Claudiu}, booktitle = {Proceedings of 2013 IEEE International Conference on Multimedia and Expo Workshops (ICME)}, title = {An evaluation of interactive search with modern video players}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Hua,Xian-Sheng and Cheng,Irene and Basu,Anup and Ling,Nam and Panchanathan,Sethuraman}, month = {jan}, pages = {1-4}, publisher = {IEEE}, abstract = {The navigation features of video players are often used for interactive search in videos, when users want to find a specific segment. Especially non-experts make use of these navigation facilities because they typically do not have any video retrieval tool at hand and - maybe more important - the navigation features of video players are very easy to use. However, in order to design professional video browsing tools that allow for better search performance but still provide ease of use, we need to know how users search with common video players. Therefore, we analyze logging data from a user study with 17 participants that performed Known Item Search tasks with an HTML5 video player. We classify search behavior by type of interaction and speed of interactive search and discuss what we can learn for the design and development of professional video search tools.}, doi = {10.1109/ICMEW.2013.6618282}, keywords = {hypermedia markup languages;interactive systems;search problems;video retrieval;video signal processing;HTML5 video player;interactive search;interactive search evaluation;known item search tasks;modern video players;navigation facilities;search behavior;video browsing tools;video retrieval tool;Browsers;Computers;Multimedia communication;Navigation;Search problems;Streaming media;Switches;HCI;Interactive Search;Video Browsing}, language = {EN}, location = {San Jose, CA, USA}, talkdate = {2013.07.15}, talktype = {registered} } @InProceedings{Riegler2013, author = {Riegler, M and Lux, Mathias and Kofler, Ch}, booktitle = {MediaEval 2013 - Multimedia Benchmark Workshop}, title = {Frame the Crowd: Global Visual Features Labeling boosted with Crowdsourcing Information}, year = {2013}, address = {Barcelona, Spain}, editor = {Larson, M and Anguera, X and Reuter, T and Jones, G and Ionescu, B and Schedl, M and Piatrik, T and Hauff, C and Soleymani, M}, month = {October}, pages = {--}, publisher = {CEUR Workshop Proceedings}, abstract = {In this paper we present our approach to the Crowd Sourcing Task of the MediaEval 2013 Benchmark [2] using transfer learning and visual features. For the visual features we adopt an existing approach for search based classification using content based image retrieval on global features with feature selection and feature combination to boost the performance. Our approach gives a baseline evaluation indicating the usefulness of global visual features, hashing and search-based classification.}, edition = {Vol 1043}, language = {EN}, talktype = {none}, url = {http://ceur-ws.org/Vol-1043/} } @InProceedings{Rass2013a, title = {A Network Modeling and Analysis Tool for Perfectly Secure Communication}, author = {Rass, Stefan and Rainer, Benjamin and Vavti, Matthias and Schauer, Stefan}, booktitle = {The 27th IEEE International Conference on Advanced Information Networking and Applications (AINA-2013)}, year = {2013}, address = {BARCELONA, Spain}, editor = {O'Conner, Lisa}, month = {mar}, pages = {267-275}, publisher = {IEEE}, abstract = {Secure communication is often based on encryption thus hinges on (public-key) infrastructures that handle all the key-management. This inevitably requires human intervention, thus creating a rather vulnerable point in the system. So it appears desirable to automate key-management tasks to the widest possible extent. In this work, we report on a software implementation of secure multipath transmission. Our system takes a network infrastructure model as input and determines the maximal achievable security for a communication between a chosen sender and receiver, while handling all key-management transparently for the user. The security is information-theoretic, and unlike public-key or symmetric cryptography does neither hinge on computational intractability nor empirical evidence. More importantly, security can be measured in quantitative terms, thus making the results useful in enterprise risk management. Our software computes the risk for a given transmission under multipath transmission and generates simple OmNet++ models to demonstrate the channel construction as practically doable and to measure the additional network overhead. This is for a-priori decision-support and practical guidance for an installation of secure multipath transmission as a high-security transmission service within the enterprise network.}, keywords = {Risk management; Network-level security and protection; Network communications; Privacy; Security}, language = {EN}, location = {BARCELONA, Spain}, talkdate = {2013.03.25}, talktype = {registered} } @InProceedings{Rainer_2013_PQS, author = {Rainer, Benjamin and Timmerer, Christian and Waltl, Markus}, booktitle = {4th International Workshop on Perceptual Quality of Systems 2013 (PQS 2013)}, title = {Recommendations for the Subjective Evaluation of Sensory Experience}, year = {2013}, address = {Vienna, Austria}, editor = {Schatz, Raimund}, month = {sep}, pages = {1-6}, publisher = {IEEE}, abstract = {Selecting and adopting the appropriate assessment method for conducting subjective quality assessments is a challenging task. The method decides whether the assessment is successful in delivering the correct answers to previously set up hypotheses. Therefore, in this paper we provide recommendations on test methods used in the domain of Sensory Experience. The proposed test methods comprise single stimulus and double stimulus methods. These test methods were used in previous studies and are presented in combination with the results of the subjective quality assessments with which they were used. Furthermore, we briefly outline our test setup, test design, and test content for assessing Sensory Experience which have been validated through conducted assessments.}, keywords = {Subjective Evaluation Methods; Sensory Experience; Recommendations}, language = {EN}, location = {Vienna, Austria}, talkdate = {2013.09.03}, talktype = {registered} } @InProceedings{Rainer2013_QoMEX2013_MediaPlayout, author = {Rainer, Benjamin and Timmerer, Christian}, booktitle = {Proceedings of the 5th International Workshop on Quality of Multimedia Experience (QoMEX'13)}, title = {Adaptive Media Playout for Inter-Destination Media Synchronization}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Timmerer, Christian and Le Callet, Patrick and Varela, Martin and Winkler, Stefan and Falk, Tiago H}, month = {jul}, pages = {44-45}, publisher = {IEEE}, abstract = {Synchronizing multimedia playback among geographically distributed clients is a challenging task and is referred to as Inter-Destination Media Synchronization (IDMS). In this paper we discuss the uses cases of IDMS as identified within the SocialSensor Project and based on these use cases we derive a novel Adaptive Media Playout (AMP) scheme which aims on carrying out the process of synchronizing the media playback at the clients to a given synchronization point. We propose how visual and acoustic features can be used to achieve a QoE-aware and context-aware AMP scheme.}, isbn13 = {-}, keywords = {Adaptive Media Playout, Inter-Destination Media Synchronization, Social TV}, language = {EN}, location = {Klagenfurt am Wörthersee, Austria}, pdf = {https://www.itec.aau.at/bib/files/QoMEX2013_MediaPlayout.pdf}, talkdate = {2013.07.03}, talktype = {poster}, url = {http://www.qomex2013.org} } @InProceedings{Rainer2013_QoMEX2013_EvalPlatform, author = {Rainer, Benjamin and Waltl, Markus and Timmerer, Christian}, booktitle = {Proceedings of the 5th International Workshop on Quality of Multimedia Experience (QoMEX'13)}, title = {A Web based Subjective Evaluation Platform}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Timmerer, Christian and Le Callet, Patrick and Varela, Martin and Winkler, Stefan and Falk, Tiago H}, month = {jul}, pages = {24-25}, publisher = {IEEE}, abstract = {Preparing and conducting subjective quality assessments is a time consuming and expensive task. Therefore, we present a Web-based evaluation framework which aims on reducing the time needed for planning and designing a subjective quality assessment. The presented framework can be used for both crowdsourced and laboratory experiments. It should ease the task of designing a subjective quality assessment by providing a flexible framework. The framework has proven its applicability and flexibility to design and conduct assessments in the past and is available as open source.}, isbn13 = {-}, keywords = {Evaluation Platform, Crowdsourced Quality Evaluation, Laboratory Quality Evaluation, Quality Assessment Framework}, language = {EN}, location = {Klagenfurt am Wörthersee, Austria}, pdf = {https://www.itec.aau.at/bib/files/QoMEX2013_EvalPlatform.pdf}, talkdate = {2013.07.03}, talktype = {poster}, url = {http://www.qomex2013.org} } @InProceedings{Raffelsberger2013a, author = {Raffelsberger, Christian and Hellwagner, Hermann}, booktitle = {Proceedings of the Eleventh IEEE International Conference on Pervasive Computing and Communications Workshops ({PerCom Workshops '13})}, title = {A Hybrid {MANET-DTN} Routing Scheme For Emergency Response Scenarios}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Indulska, Jadwiga and Bisdikian, Chatschik}, month = {mar}, pages = {505-510}, publisher = {IEEE}, abstract = {Emergency response operations are a promising application area for mobile ad-hoc networks (MANETs). Most existing MANET routing protocols assume that an end-toend path between source and destination can be established. However, this assumption may not hold in a hastily formed network established during an emergency response. This paper evaluates a store-and-forward mechanism for proactive routing protocols to mitigate the effects of network disruptions. The mechanism is integrated into two routing protocols. The modified protocols are evaluated in an emergency response scenario that includes a disaster area mobility model and a wireless obstacle model. The scenario represents a realistic first responder operation after an incident in a chemical facility. The evaluation results show that networks for disaster responses benefit from the modified routing protocols.}, language = {EN}, location = {San Diego, CA, USA}, pdf = {https://www.itec.aau.at/bib/files/PerNEM2013-cr.pdf}, talkdate = {2013.03.22}, talktype = {registered} } @InProceedings{Raffelsberger2013, author = {Raffelsberger, Christian and Hellwagner, Hermann}, booktitle = {Proceedings of the Combined workshop on Self-organizing, Adaptive, and Context-Sensitive Distributed Systems and Self-organized Communication in Disaster Scenarios ({SACS/SoCoDiS} '13)}, title = {Overview of Hybrid {MANET-DTN} Networking and its Potential for Emergency Response Operations}, year = {2013}, address = {Berlin, Germany}, editor = {Zapf, Michael and Evers, Florian}, month = {mar}, pages = {1 -12}, publisher = {Electronic Communications of the EASST ({ECEASST})}, abstract = {Communication networks for emergency response operations have to operate in harsh environments. As fixed infrastructures may be unavailable (e.g., they are destroyed or overloaded), mobile ad-hoc networks (MANETs) are a promising solution to establish communication for emergency response operations. However, networks for emergency responses may provide diverse connectivity characteristics which imposes some challenges, especially on routing. Routing protocols need to take transmission errors, node failures and even the partitioning of the network into account. Thus, there is a need for routing algorithms that provide mechanisms from Delay or Disruption Tolerant Networking (DTN) in order to cope with network disruptions but at the same time are as efficient as MANET routing schemes in order to preserve network resources. This paper reviews several hybrid MANET-DTN routing schemes that can be found in the literature. Additionally, the paper evaluates a realistic emergency response scenario and shows that MANET-DTN routing schemes have the potential to improve network performance as the resulting network is diverse in terms of connectivity. In particular, the network provides well-connected regions whereas other parts are only intermittently connected.}, issn = {1863-2122}, language = {EN}, location = {Stuttgart, Germany}, pdf = {https://www.itec.aau.at/bib/files/SoCoDis2013-cr.pdf}, talkdate = {2013.03.15}, talktype = {registered} } @TechReport{QUALINETWhitePaper, author = {Brunnstr\"om, Kjell and Beker, Sergio Ariel and De Moor, Katrien and Dooms, Ann and Egger, Sebastian and Garcia, Marie-Neige and Hossfeld, Tobias and Jumisko-Pyykk\"o, Satu and Keimel, Christian and Larabi, Mohamed-Chaker and Lawlor, Bob and Le Callet, Patrick and M\"oller, Sebastian and Pereira, Fernando and Pereira, Manuela and Perkis, Andrew and Pibernik, Jesenka and Pinheiro, Antonio and Raake, Alexander and Reichl, Peter and Reiter, Ulrich and Schatz, Raimund and Schelkens, Peter and Skorin-Kapov, Lea and Strohmeier, Dominik and Timmerer, Christian and Varela, Martin and Wechsung, Ina and You, Junyong and Zgank, Andrej}, institution = {QUALINET}, title = {QUALINET White Paper on Definitions of Quality of Experience}, year = {2013}, address = {Lausanne, Switzerland}, month = {mar}, language = {EN}, pages = {24}, pdf = {https://www.itec.aau.at/bib/files/QoE_whitepaper_v1.2.pdf} } @InProceedings{Primus_CBMI2013, author = {Primus, Manfred Jürgen and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {11th International Workshop on Content-Based Multimedia Indexing}, title = {Segmentation of Recorded Endoscopic Videos by Detecting Significant Motion Changes}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Czuni, Laszlo}, month = {jun}, pages = {223--228}, publisher = {IEEE Computer Society}, abstract = {In the medical domain it has become common to store recordings of endoscopic surgeries or procedures. The storage of these endoscopic videos provides not only evidence of the work of the surgeons but also facilitates research, the training of new surgeons and supports explanations to the patients. However, an endoscopic video archive, where tens or hundreds of new videos are added each day, needs content-based analysis in order to provide content-based search. A fundamental first step in content analysis is the segmentation of the video. We propose a new method for segmentation of endoscopic videos, based on spatial and temporal differences of motion in these videos. Through an evaluation with 20 videos we show that our approach provides reasonable performance.}, language = {EN}, location = {Veszprem, Hungary}, pdf = {https://www.itec.aau.at/bib/files/CBMI_2013_39.pdf}, talkdate = {2013.06.18}, talktype = {registered} } @InProceedings{Posch2013, author = {Posch, Daniel and Hellwagner, Hermann and Schartner, Peter}, booktitle = {Proceedings of the 8th International Workshop on Secure Network Protocols (NPSec' 13)}, title = {On-Demand Video Streaming based on Dynamic Adaptive Encrypted Content Chunks}, 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 = {https://www.itec.aau.at/bib/files/ICNP_NPSEC_Streaming.pdf}, talkdate = {2013.10.07}, talktype = {registered} } @Article{Pohl2013d, author = {Pohl, Daniela and Bouchachia, Abdelhamid and Hellwagner, Hermann}, journal = {Multimedia Tools and Applications}, title = {Social Media for Crisis Management: Clustering Approaches for Sub-Event Detection}, year = {2013}, month = {dec}, pages = {1-32}, address = {Springer, NY, US}, language = {EN}, publisher = {Springer US} } @InCollection{Pohl2013c, author = {Pohl, Daniela and Bouchachia, Abdelhamid}, booktitle = {Business Intelligence and Performance Management}, publisher = {Springer London}, title = {Financial Time Series Processing: A Roadmap of Online and Offline Methods}, year = {2013}, address = {London, UK}, editor = {Rausch, Peter and Sheta, Alaa F and Ayesh, Aladdin}, month = {apr}, pages = {145-162}, series = {Advanced Information and Knowledge Processing}, language = {EN}, subtitle = {Theory, Systems and Industrial Applications} } @Article{Pohl2013b, author = {Pohl, Daniela and Bouchachia, Abdelhamid and Hellwagner, Hermann}, journal = {International Journal of Information Systems for Crisis Response and Management (IJISCRAM)}, title = {Supporting Crisis Management via Detection of Sub-Events in Social Networks}, year = {2013}, month = {jul}, number = {3}, pages = {20-36}, volume = {5}, address = {Hershey, PA, USA}, language = {EN}, publisher = {IGI Global} } @InProceedings{Pohl2013a, author = {Pohl, Daniela and Bouchachia, Abdelhamid and Hellwagner, Hermann}, booktitle = {12th International Conference on Machine Learning and Applications}, title = {Online Processing of Social Media Data for Emergency Management}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Tecuci, Gheorghe and Boicu, Mihai and Kubat, Miroslav}, month = {dec}, pages = {1-6}, publisher = {IEEE}, abstract = {Social media offers an opportunity for emergency management to identify issues that need immediate reaction. To support the effective use of social media, an analysis approach is needed to identify crisis-related hotspots. We consider in this investigation the analysis of social media (i.e., Twitter, Flickr and YouTube) to support emergency management by identifying sub-events. Sub-events are significant hotspots that are of importance for emergency management tasks. Aiming at sub-event detection, recognition and tracking, the data is processed online in real-time. We introduce an incremental feature selection mechanism to identify meaningful terms and use an online clustering algorithm to uncover sub-events on-the-fly. Initial experiments are based on tweets enriched with Flickr and YouTube data collected during Hurricane Sandy. They show the potential of the proposed approach to monitor sub-events for real-world emergency situations.}, keywords = {Online Clustering, Sub-Event Detection, Crisis Management}, language = {EN}, location = {Miami, Florida, USA}, pdf = {https://www.itec.aau.at/bib/files/Pohl_ICMLA13.pdf}, talkdate = {2013.12.01}, talktype = {poster} } @InProceedings{Muenzer2013b, author = {Münzer, Bernd and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {IEEE International Symposium on Multimedia (ISM2013)}, title = {Relevance Segmentation of Laparoscopic Videos}, year = {2013}, address = {Anaheim, CA, USA}, editor = {Liao, Anthony Y H}, month = {dec}, pages = {84-91}, publisher = {IEEE}, abstract = {In recent years, it became common to record video footage of laparoscopic surgeries. This leads to large video archives that are very hard to manage. They often contain a considerable portion of completely irrelevant scenes which waste storage capacity and hamper an efficient retrieval of relevant scenes. In this paper we (1) define three classes of irrelevant segments, (2) propose visual feature extraction methods to obtain irrelevance indicators for each class and (3) present an extensible framework to detect irrelevant segments in laparoscopic videos. The framework includes a training component that learns a prediction model using nonlinear regression with a generalized logistic function and a segment composition algorithm that derives segment boundaries from the fuzzy frame classifications. The experimental results show that our method performs very good both for the classification of individual frames and the detection of segment boundaries in videos and enables considerable storage space savings.}, language = {DE}, location = {Anaheim, CA, USA}, talkdate = {2013.12.11}, talktype = {registered} } @InProceedings{Muenzer2013a, author = {Münzer, Bernd and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {Proceedings of the IEEE International Conference on Multimedia and Expo (ICME) 2013}, title = {Improving Encoding Efficiency of Endoscopic Videos by using Circle Detection based Border Overlays}, year = {2013}, address = {San Jose, USA}, editor = {Zabulis, Xenophon}, month = {jul}, pages = {1-4}, publisher = {IEEE}, abstract = {Videos of endoscopic procedures typically feature a circular content area in the image center. This area is surrounded by a dark border that carries no relevant information but is subject to noise. Thus, a considerable proportion of the available bitrate has to be wasted to encode the border regions. We propose to superimpose the border regions with a homogenous black mask so that it can be encoded efficiently with skipped macroblocks. To determine the exact position and size of the circular content area we use an efficient circle detection algorithm. Through an evaluation with 138 videos we show that the border overlay can significantly reduce the bitrate without degrading the visual quality of the content area.}, doi = {10.1109/ICMEW.2013.6618304}, language = {EN}, location = {San Jose, USA}, talkdate = {2013.07.18}, talktype = {poster} } @InProceedings{Muenzer2013, author = {Münzer, Bernd and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {26th International Symposium on Computer-Based Medical Systems (CBMS'13)}, title = {Detection of Circular Content Area in Endoscopic Videos}, year = {2013}, address = {Porto, Portugal}, editor = {Soda, Paolo}, month = {jun}, pages = {534-536}, publisher = {IEEE}, abstract = {The actual content of endoscopic videos is typically limited to a circular area in the image center. This area has a dynamic position and size and is surrounded by a dark, but noisy border. In this paper we present a novel algorithm that (1) classifies which frames of an endoscopic video feature the circular content area and (2) determines its exact position and size, if present. This information is very useful for improving the performance of subsequent analysis techniques. It can also be used for more efficient video encoding and economic printing of still images in findings and reports. The evaluation shows that the proposed method is very accurate, robust and efficient in terms of runtime.}, doi = {10.1109/CBMS.2013.6627865}, language = {EN}, location = {Porto, Portugal}, talkdate = {2013.06.20}, talktype = {poster} } @InProceedings{Mueller2013b, 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}, title = {libdash – An Open Source Software Library for the MPEG-DASH Standard}, 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 = {https://www.itec.aau.at/bib/files/libdash-demo.pdf}, talkdate = {2013.07.18}, talktype = {poster} } @Article{Mueller2013_MMC, author = {Mueller, Christopher and Lederer, Stefan and Timmerer, Christian}, journal = {IEEE Multimedia Communications Technical Committee E-Letter}, title = {Fair Share Dynamic Adaptive Streaming over HTTP}, 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 = {https://www.itec.aau.at/bib/files/E-Letter-March13.pdf}, publisher = {IEEE Communications Society [online]}, url = {http://committees.comsoc.org/mmc/e-news/E-Letter-March13.pdf} } @InProceedings{Mueller2013, 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}, title = {Dynamic Adaptive Streaming over HTTP/2.0}, 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 = {https://www.itec.aau.at/bib/files/paper_330.pdf}, talkdate = {2013.07.17}, talktype = {registered} } @InProceedings{Marques2013, author = {Marques, Oge and Snyder, Justyn and Lux, Mathias}, booktitle = {CHI '13 Extended Abstracts on Human Factors in Computing Systems}, title = {How Well Do You Know Tom Hanks?: Using a Game to Learn About Face Recognition}, year = {2013}, address = {New York, USA}, editor = {Mackay, W and Brewster, St and Bodker, S}, month = {jan}, pages = {337--342}, publisher = {ACM}, series = {CHI EA '13}, abstract = {Human face recognition abilities vastly outperform computer-vision algorithms working on comparable tasks, especially in the case of poor lighting, bad image quality, or partially hidden faces. In this paper, we describe a novel game with a purpose in which players must guess the name of a celebrity whose face appears blurred. The game combines a successful casual game paradigm with meaningful applications in both human- and computer-vision science. Preliminary user studies were conducted with 28 users and more than 7,000 game rounds. The results supported and extended pre-existing knowledge and hypotheses from controlled scientific experiments, which show that humans are remarkably good at recognizing famous faces, even with a significant degree of blurring. Our results will be further incorporated into research in human vision as well as machine-learning and computer-vision algorithms for face recognition.}, doi = {10.1145/2468356.2468416}, keywords = {computer vision, face recognition, games, human vision}, language = {EN}, talktype = {none}, url = {http://doi.acm.org/10.1145/2468356.2468416} } @InProceedings{Lux_MMSys_Feb_2013, author = {Lux, Mathias and Riegler, Michael}, booktitle = {Proceedings of the 4th ACM Multimedia Systems Conference}, title = {Annotation of Endoscopic Videos on Mobile Devices: A Bottom-up Approach}, year = {2013}, address = {New York, NY, USA}, editor = {Griwodz, C}, month = {jan}, pages = {141--145}, publisher = {ACM}, series = {MMSys '13}, abstract = {Video annotation is a tedious task. But especially in medical domain the knowledge of experts for the interpretation of videos is of high value. Typically medical doctors do not have time for extensive annotation, but are used to manual notes, speech recordings, and pointing. In this demo paper we present an application for annotation of medical videos, focusing on endoscopic surgery. We adopt common interaction method of medical experts to mobile computing and provide a tool for experts to annotate videos by drawing on the video and recording speech annotations.}, doi = {10.1145/2483977.2483996}, keywords = {medical multimedia information systems, video annotation}, language = {EN}, location = {Oslo, Norway}, talkdate = {2013.02.28}, talktype = {registered}, url = {http://doi.acm.org/10.1145/2483977.2483996} } @Article{Lux_Aljosa_2013, author = {Lux, Mathias}, journal = {ACM SIGMultimedia Records}, title = {An Interview with Aljosa Smolic}, year = {2013}, issn = {1947-4598}, month = sep, number = {3}, pages = {4-5}, volume = {5}, abstract = {Dr. Aljosa Smolic joined Disney Research Zürich, Switzerland in 2009, as Senior Research Scientist and Head of the "Advanced Video Technology" group. Before he was Scientific Project Manager at the Fraunhofer Institute for Telecommunications, Heinrich- Hertz-Institut (HHI), Berlin, also heading a research group. He has been involved in several national and international research projects, where he conducted research in various fields of video processing, video coding, computer vision and computer graphics and published more than 100 refereed papers in these fields. In current projects he is responsible for research in 2D video, 3D video and free viewpoint video processing and coding.}, address = {New York, USA}, doi = {10.1145/2552972.2552981}, language = {EN}, publisher = {ACM}, url = {http://doi.acm.org/10.1145/2552972.2552981} } @PhdThesis{Lux2013b, author = {Lux, Mathias}, school = {Klagenfurt University}, title = {User Intentions in Multimedia Information Systems and Retrieval}, year = {2013}, address = {Klagenfurt, AT}, month = {October}, type = {Habilitation Thesis}, abstract = {How to build better multimedia information systems? Management and organization of multimedia data has become easier thanks to the wide availability of metadata as well as advances in content-based image retrieval (CBIR); these advances, however, do not address what matters the most: the actual users of multimedia information systems. The goals and aims of users, i.e., their intentions, need to be put into focus in some creative way. This talk introduces the very notion of user intentions in multimedia information systems and discusses challenges and approaches in this new topic.}, language = {EN}, pages = {pp. 207}, publisher = {Self published} } @InProceedings{Lux2013, author = {Lux, Mathias}, booktitle = {Proceedings of the 21st ACM International Conference on Multimedia}, title = {LIRE: Open Source Image Retrieval in Java}, year = {2013}, address = {New York, NY, USA}, editor = {Jaimes, A and Sebe, N and Boujemaa, N and Gatica-Perez, D and Shamma, DA and Worring, M and Zimmermann, R}, month = {oct}, pages = {843--846}, publisher = {ACM}, series = {MM '13}, abstract = {Content based image retrieval has been around for some time. There are lots of different test data sets, lots of published methods and techniques, and manifold retrieval challenges, where content based image retrieval is of interest. LIRE is a Java library, that provides a simple way to index and retrieve millions of images based on the images' contents. LIRE is robust and well tested and is not only recommended by the websites of ImageCLEF and MediaEval, but is also employed in industry. This paper gives an overview on LIRE, its use, capabilities and reports on retrieval and runtime performance.}, doi = {10.1145/2502081.2502226}, keywords = {content based image retrieval}, language = {EN}, location = {Barcelona, Spain}, talkdate = {2013.10.21}, talktype = {registered}, url = {http://doi.acm.org/10.1145/2502081.2502226} } @InProceedings{Liu2013, 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}, title = {Dynamic Adaptive Streaming over CCN: A Caching and Overhead Analysis}, 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 = {https://www.itec.aau.at/bib/files/ICC2013 -DASH Over CCN.PDF}, talkdate = {2013.06.11}, talktype = {registered}, url = {http://www.ieee-icc.org} } @InProceedings{Lederer2013c, 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}, title = {An Experimental Analysis of Dynamic Adaptive Streaming over HTTP in Content Centric Networks}, 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 = {https://www.itec.aau.at/bib/files/ICME_Overhead-Performance-DASHoverCCN.pdf}, talkdate = {2013.07.18}, talktype = {registered} } @InProceedings{Lederer2013b, 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}, title = {Adaptive Streaming over Content Centric Networks in Mobile Networks using Multiple Links}, 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 = {https://www.itec.aau.at/bib/files/ICC2013_Mobile_DASHoverCCN.pdf}, talkdate = {2013.06.13}, talktype = {registered}, url = {http://multicomm.diee.unica.it/} } @InProceedings{Lederer2013a, 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}, title = {Distributed DASH Dataset}, 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 = {https://www.itec.aau.at/bib/files/MMSys_CDN_Simulation_Dataset_v2.0.pdf}, talkdate = {2013.02.27}, talktype = {registered}, url = {http://www.mmsys.org/} } @Article{Lederer2013_MMC, author = {Lederer, Stefan and Mueller, Christopher and Grandl, Reinhard and Timmerer, Christian}, journal = {IEEE Multimedia Communications Technical Committee E-Letter}, title = {Adaptive Multimedia Streaming over Information-Centric Networks in Mobile Networks using Multiple Mobile Links}, year = {2013}, month = {nov}, number = {6}, pages = {38-41}, volume = {8}, address = {New York, NY, USA}, language = {EN}, pdf = {https://www.itec.aau.at/bib/files/E-Letter-Nov2013.pdf}, publisher = {IEEE Communications Society [online]}, url = {http://committees.comsoc.org/mmc/e-news/E-Letter-Nov2013.pdf} } @Article{Kud2013_SPIC, author = {Kudumakis, Panos and Sandler, Mark and Anadiotis, Angelos-Christos G and Venieris, Iakovos S and Difino, Angelo and Wang, Xin and Tropea, Giuseppe and Grafl, Michael and Rodríguez-Doncel, Víctor and Llorente, Silvia and Delgado, Jaime}, journal = {Signal Processing: Image Communication}, title = {MPEG-M: A Digital Media Ecosystem for Interoperable Applications}, year = {2013}, issn = {09235965}, month = {dec}, pages = {24}, abstract = {MPEG-M is a suite of ISO/IEC standards (ISO/IEC 23006) that has been developed under the auspices of Moving Picture Experts Group (MPEG). MPEG-M, also known as Multimedia Service Platform Technologies (MSPT), facilitates a collection of multimedia middleware APIs and elementary services as well as service aggregation so that service providers can offer users a plethora of innovative services by extending current IPTV technology toward the seamless integration of personal content creation and distribution, e-commerce, social networks and Internet distribution of digital media.}, address = {Amsterdam, Netherlands}, doi = {10.1016/j.image.2013.10.006}, language = {EN}, publisher = {Elsevier}, url = {http://dx.doi.org/10.1016/j.image.2013.10.006} } @InProceedings{HudelistMM2013, author = {Hudelist, Marco Andrea and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {Proceedings of the ACM International Conference on Multimedia (MM2013)}, title = {Mobile Video Browsing with the ThumbBrowser}, year = {2013}, address = {New York, NY, USA}, editor = {Gatica-Perez, Daniel and Shamma, David and Worring, Marcel and Zimmermann, Roger and Jaimes, Alejandro and Sebe, Nicu and Boujemaa, Nozha}, month = {oct}, pages = {2}, publisher = {ACM Digital Library}, language = {EN}, location = {Barcelona, Spain}, talkdate = {2013.10.23}, talktype = {poster} } @InProceedings{HudelistISM2013, author = {Hudelist, Marco Andrea and Schoeffmann, Klaus and Ahlström, David}, booktitle = {IEEE International Symposium on Multimedia (ISM2013)}, title = {Evaluation of Image Browsing Interfaces for Smartphones and Tablets}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Friedland, Gerald and Liu, Zhu and Steinmetz, Nadine}, month = {dec}, pages = {8}, publisher = {IEEE}, language = {EN}, location = {Anaheim, CA, USA}, talkdate = {2013.12.09}, talktype = {registered} } @InProceedings{Hudelist2013_ICMRa, author = {Hudelist, Marco Andrea and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {Proceedings of the 3rd ACM International Conference on Multimedia Retrieval (ICMR 2013)}, title = {Next Generation Image and Video Browsing on Mobile Devices}, year = {2013}, address = {New York, NY, USA}, editor = {Jain, Ramesh and Prabhakaran, Balakrishnan}, month = {apr}, pages = {333--336}, publisher = {ACM}, language = {EN}, location = {Dallas, Texas, USA.}, talkdate = {2013.04.18}, talktype = {registered} } @InProceedings{Hudelist2013_ICMR, author = {Hudelist, Marco Andrea and Schoeffmann, Klaus and Böszörmenyi, Laszlo}, booktitle = {Proceedings of the 3rd ACM International Conference on Multimedia Retrieval}, title = {Mobile Video Browsing with a 3D Filmstrip}, year = {2013}, address = {New York, NY, USA}, editor = {Jain, Ramesh and Prabhakaran, Balakrishnan}, month = {apr}, pages = {299--300}, publisher = {ACM}, language = {EN}, location = {Dallas, Texas, USA}, talkdate = {2013.04.19}, talktype = {poster} } @InProceedings{Grafl2013_ViDEv, 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)}, title = {Evaluation of Hybrid Scalable Video Coding for {HTTP}-based Adaptive Media Streaming with High-Definition Content}, 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 = {https://www.itec.aau.at/bib/files/Hybrid_SVC-DASH.pdf}, talkdate = {2013.06.04}, talktype = {registered} } @PhdThesis{Grafl2013_PhD, author = {Grafl, Michael}, school = {Alpen-Adria-Universität Klagenfurt}, title = {Scalable Media Delivery Chain with Distributed Adapation}, year = {2013}, month = {jun}, abstract = {On TV screens, PCs, tablets, and mobile phones, video streaming has become a constant companion in our daily lives. For every video, we expect high visual quality, free from distortions, that is adjusted to the device at hand. But how can streaming systems cope with the increasing network traffic, the subsequent network congestions, and the different characteristics of end-user terminals? This thesis covers approaches for distributed adaptation of scalable video resources in media delivery. Scalable video resources consist of several layers that enable various spatial resolutions, frame rates, or qualities of a content. By dropping some of these layers, the video can be adjusted to the available bandwidth or to a specific end-user terminal. The adaptation can be performed on the sender side, on the receiver side, and on one or more network nodes. Scalable media coding can also help to reduce bandwidth requirements in multicast scenarios (e.g., for IPTV). One popular realization of scalable media coding is the Scalable Video Coding (SVC) standard. This thesis consists of three main parts, addressing various challenges towards efficient SVC adaptation. The first part of this thesis focuses on the encoding of SVC. In order to enable efficient adaptation, the configuration of layers has to be carefully chosen at encoding time. Thus, the performances of various encoding configurations and encoder implementations are evaluated. Furthermore, encoding guidelines for SVC are developed, which are aligned with recommendations of industry streaming solutions. The evaluation results of the developed SVC encoding guidelines suggest that quality scalability should be preferred over spatial scalability for adaptive streaming scenarios. Different resolutions for supporting device classes should rather be provided as separate SVC streams. The second part of this thesis deals with the fact that scalable media formats, such as SVC, are still not widely adopted neither on the sender side nor on the end-user terminal. In order to enable the deployment of SVC for network transmission and to improve the support for streaming to heterogeneous devices, the concept of SVC tunneling is introduced in this thesis. The video is transcoded to SVC at the sender side and then transcoded back to another video format at the receiver side at an advanced home-gateway. However, the transcoding between video formats has a negative impact on the video quality. The trade-off between quality loss and bandwidth efficiency of SVC tunneling is evaluated. SVC tunneling with quality layers enables bandwidth savings at moderate quality loss (approx. 2.5 dB) compared to streaming separate non-scalable representations of the same qualities. In the third part of this thesis, adaptation techniques for content-aware networks are investigated. In content-aware networks, some network nodes are capable to dynamically adapt video streams in reaction to varying network loads. With the increasing adoption of HTTP streaming, adaptation at the client side becomes a main factor for the viewing experience. The switch between two representations (e.g., different bitrates) of a video can disrupt that viewing experience. To reduce the effect of an abrupt quality change, the approach of a smooth transition between representations is developed and evaluated. A subjective user study indicates that this approach can indeed improve the overall viewing quality. Finally, the findings of the previous parts are integrated in an adaptive end-to-end SVC streaming system. Evaluations of this streaming system show that the developed adaptation framework significantly improves the video quality under packet loss (by up to 6 dB) compared to non-adaptive streaming.}, language = {EN}, pages = {264}, pdf = {https://www.itec.aau.at/bib/files/Thesis_mgrafl.pdf} } @InProceedings{Grafl2013_PQS, author = {Grafl, Michael and Timmerer, Christian}, booktitle = {Proceedings of the 4th International Workshop on Perceptual Quality of Systems ({PQS} 2013)}, title = {Representation Switch Smoothing for Adaptive {HTTP} Streaming}, year = {2013}, address = {Vienna, Austria}, editor = {Schatz,Raimund and Hoßfeld, Tobias}, month = {sep}, pages = {178-183}, publisher = {FTW}, abstract = {When an adaptive media streaming system has to switch from one representation of the content to another, the switch causes viewer distraction. We introduce the concept of representation switch smoothing for alleviating the distraction and improving the overall quality of experience. As adaptive HTTP streaming systems typically deploy video buffers on the client side, the adaptation decision is known far enough ahead of playout time to perform a seamless transition between quality representations. We discuss implementation considerations for an adaptive HTTP streaming system with scalable video coding, present a subjective evaluation of the proposed approach, and identify factors that influence how smooth transitions are perceived.}, keywords = {adaptive streaming; representation switching; quality of experience}, language = {EN}, location = {Vienna, Austria}, pdf = {https://www.itec.aau.at/bib/files/representation_switch_smoothing.pdf}, talkdate = {2013.09.04}, talktype = {registered} } @InProceedings{Grafl2013_ISCC, author = {Grafl, Michael and Timmerer, Christian and Hellwagner, Hermann and Cherif, Wael and Negru, Daniel and Battista, Stefano}, booktitle = {Proceedings of the 18th {IEEE} Symposium on Computers and Communication ({ISCC} 2013)}, title = {Scalable Video Coding Guidelines and Performance Evaluations for Adaptive Media Delivery of High Definition Content}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Douligeris, Christos and Gotovac, Sven and Vojnović, Milan}, month = {jul}, pages = {6}, publisher = {IEEE}, abstract = {Scalability within media coding allows for content adaptation towards heterogeneous user contexts and enables in-network adaptation. However, there is no straightforward solution how to encode the content in a scalable way while maximizing rate-distortion performance. In this paper we provide encoding guidelines for scalable video coding based on a survey of media streaming industry solutions and a comprehensive performance evaluation using four state of the art scalable video codecs with a focus on high-definition content (1080p).}, keywords = {scalable video coding; adaptation; high-definition video; encoding; adaptive media streaming; content-aware networking}, language = {EN}, location = {Split, Coratia}, pdf = {https://www.itec.aau.at/bib/files/SVC_guide_and_eval.pdf}, talkdate = {2013.07.10}, talktype = {registered} } @Article{Grafl2013_ComCom, author = {Grafl, Michael and Timmerer, Christian and Hellwagner, Hermann and Cherif, Wael and Ksentini, Adlen}, journal = {Computer Communications}, title = {Hybrid Scalable Video Coding for {HTTP}-based Adaptive Media Streaming with High-Definition Content}, year = {2013}, issn = {01403664}, 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}, language = {EN}, publisher = {Elsevier} } @Article{Grafl2012_MM, author = {Grafl, Michael and Timmerer, Christian and Hellwagner, Hermann and Xilouris, George and Gardikis, Georgios and Renzi, Daniele and Battista, Stefano and Borcoci, Eugen and Negru, Daniel}, journal = {IEEE MultiMedia}, title = {Scalable Media Coding enabling Content-Aware Networking}, year = {2013}, issn = {1070-986X}, month = {apr}, number = {2}, pages = {30-41}, volume = {20}, abstract = {Given that multimedia services are becoming increasingly popular, they are expected to play a dominant role for the Future Internet. In this context, it is essential that Content-Aware Networking (CAN) architectures, as envisaged in the frame of the Future Internet, explicitly address the efficient delivery and processing of multimedia content. This article proposes adopting a content-aware approach into the network infrastructure, thus making it capable of identifying, processing, and manipulating (i.e., adapting, caching, etc.) media streams and objects in real time towards Quality of Service/Experience (QoS/QoE) maximization. Our proposal is built upon the exploitation of scalable media coding technologies within such a content-aware networking environment and is discussed based on four representative use cases for media delivery (unicast, multicast, peer-to-peer, and adaptive HTTP streaming) and with respect to a selection of CAN challenges, specifically flow processing, caching/buffering, and QoS/QoE management.}, address = {Los Alamitos, CA, USA}, doi = {http://doi.ieeecomputersociety.org/10.1109/MMUL.2012.57}, language = {EN}, pdf = {https://www.itec.aau.at/bib/files/SMC_enabling_CAN.pdf}, publisher = {IEEE Computer Society} } @InCollection{Gardikis2013_3DFIM, author = {Gardikis, Georgios and Pallis, Evangelos and Grafl, Michael}, booktitle = {3D Future Internet Media}, publisher = {Springer Science+Business Media, LLC}, title = {Media-Aware Networks in Future Internet Media}, 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} } @InProceedings{DelFabro_CBMI2013, author = {Del Fabro, Manfred and Schoeffmann, Klaus and Guggenberger, Mario and Taschwer, Mario}, booktitle = {11th International Workshop on Content-Based Multimedia Indexing}, title = {A Filtering Tool to Support Interactive Search in Internet Video Archives}, year = {2013}, address = {Los Alamitos, CA, USA}, editor = {Czuni, Laszlo}, month = {jun}, pages = {7--10}, publisher = {IEEE Computer Society}, language = {EN}, location = {Veszprem, Hungary}, talkdate = {2013.06.18}, talktype = {poster} } @InProceedings{DelFabro2013a, author = {Del Fabro, Manfred and Münzer, Bernd and Böszörmenyi, Laszlo}, booktitle = {Advances in Multimedia Modeling}, title = {AAU Video Browser with Augmented Navigation Bars}, year = {2013}, address = {Berlin Heidelberg}, editor = {Li, Shipeng and El-Saddik, Abdulmotaleb and Wang, Meng and Mei, Tao and Sebe, Nicu and Yan, Shuicheng and Hong, Richang and Gurrin, Cathal}, month = {jan}, pages = {544-546}, publisher = {Springer}, series = {Lecture Notes in Computer Science Volume 7733}, abstract = {We present an improved version of last year’s winner of the Video Browser Showdown. In a preprocessing step video segments are detected and clustered in several latent classes of similar content based on color and motion information. The navigation bars of our video browser are then augmented with different colors indicating where elements of the detected clusters are located. As humans are able to classify the content of clusters fast, they can benefit from this information when browsing through a video.}, doi = {10.1007/978-3-642-35728-2_9}, isbn10 = {978-3-642-35727-5}, isbn13 = {978-3-642-35728-2}, language = {EN}, location = {Huangshan, China}, subtitle = {19th International Conference, MMM 2013, Huangshan, China, January 7-9, 2013, Proceedings, Part II}, talkdate = {2013.01.08}, talktype = {poster} } @InProceedings{DelFabro2013, author = {Del Fabro, Manfred and Münzer, Bernd and Böszörmenyi, Laszlo}, booktitle = {Advances in Multimedia Modeling}, title = {Smart Video Browsing With Augmented Navigation Bars}, year = {2013}, address = {Berlin Heidelberg}, editor = {Li, Shipeng and El-Saddik, Abdulmotaleb and Wang, Meng and Mei, Tao and Sebe, Nicu and Yan, Shuicheng and Hong, Richang and Gurrin, Cathal}, month = {jan}, pages = {88-98}, publisher = {Springer}, series = {Lecture Notes in Computer Science Volume 7733}, abstract = {While accuracy and speed get a lot of attention in video retrieval research, the investigation of interactive retrieval tools gets less attention and is often regarded as trivial. We want to show that even simple ideas have potential to improve the retrieval performance by giving some automated support to the browsing user. We present a video browsing concept where video segments are clustered in several latent classes of similar content. The navigation bars of our video browser are augmented with different colors indicating where elements of these clusters are located. As humans are able to classify the content of clusters fast, they can benefit from this information when browsing a video. We present a study where we investigated how humans can be supported in different video browsing tasks with a color-based and a motion-based clustering of video content.}, doi = {10.1007/978-3-642-35728-2_9}, isbn10 = {978-3-642-35727-5}, isbn13 = {978-3-642-35728-2}, language = {EN}, location = {Huangshan, China}, subtitle = {19th International Conference, MMM 2013, Huangshan, China, January 7-9, 2013, Proceedings, Part II}, talkdate = {2013.01.08}, talktype = {registered} } @InProceedings{Crabtree2013, author = {Crabtree, Barry and Stevens, Tim and Allan, Brahin and Lederer, Stefan and Posch, Daniel and Mueller, Christopher and Timmerer, Christian}, booktitle = {CCNxConn 2013}, title = {Video Adaptation in Limited or Zero Network Coverage}, 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 = {https://www.itec.aau.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/} } @InProceedings{Bailer2013, author = {Bailer, Werner and Schoeffmann, Klaus and Ahlström, David and Weiss, Wolfgang and Del Fabro, Manfred}, booktitle = {Advances in Multimedia Modeling}, title = {Interactive Evaluation of Video Browsing Tools}, year = {2013}, address = {Berlin Heidelberg}, editor = {Li, Shipeng and El-Saddik, Abdulmotaleb and Wang, Meng and Mei, Tao and Sebe, Nicu and Yan, Shuicheng and Hong, Richang and Gurrin, Cathal}, month = {jan}, pages = {81-91}, publisher = {Springer}, series = {Lecture Notes in Computer Science Volume 7732}, abstract = {The Video Browser Showdown (VBS) is a live competition for evaluating video browsing tools regarding their efficiency at known-item search (KIS) tasks. The first VBS was held at MMM 2012 with eight teams working on 14 tasks, of which eight were completed by expert users and six by novices. We describe the details of the competition, analyze results regarding the performance of tools, the differences between the tasks and the nature of the false submissions.}, doi = {10.1007/978-3-642-35728-2_9}, isbn10 = {978-3-642-35724-4}, isbn13 = {978-3-642-35725-1}, language = {EN}, location = {Huangshan, China}, subtitle = {19th International Conference, MMM 2013, Huangshan, China, January 7-9, 2013, Proceedings, Part I}, talkdate = {2013.01.07}, talktype = {registered} } @InProceedings{Alberti_QoMEX2013_DASH, 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)}, title = {Automated QoE Evaluation of Dynamic Adaptive Streaming over HTTP}, 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 = {https://www.itec.aau.at/bib/files/p20-Alberti.pdf}, talkdate = {2013.07.03}, talktype = {registered} }