[127] | Harald Kosch, Ahmed Moustefaoui, Laszlo Böszörmenyi, Lionel Brunie, Heuristics for Optimizing Multi-clip Queries in Video Databases, In Multimedia Tools and Applications, Springer, vol. 22, no. 3, Heidelberg, Germany, pp. 235-262, 2004.
[bib] [abstract]
Abstract: A multi-clip query requests multiple video clips. In this paper we address the multi-clip query optimization problem. We propose a new heuristics called Restricted Search Interval that maximizes clip sharing between queries and consequently reduces the workload of the video server. An adaptation of our heuristics for optimizing the response time of the query is presented as well. The experimental results show that the suggested heuristics reduces the server workload by about 68% in comparison to a classical heuristic approach.
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[126] | Peter Karpati, A Kocsor, Laszlo Böszörmenyi, Client Behaviour Prediction in a Proactive Video Server, Technical report, Institute of Information Technology (ITEC), Klagenfurt University, no. TR/ITEC/04/2.18, Klagenfurt, Austria, pp. 15, 2004.
[bib] [abstract]
Abstract: We present a possibility how to add proactive behaviour to Video-on-Demand systems. To do so we propose categorizing videos and using external information as well as observing the behaviour of our clients. We examined 23 predictor functions on artificial and real datasets using different similarity measures to compare them. Our model is quite simple; therefore some extensions are proposed at the end.
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[125] | Dietmar Jannach, Klaus Leopold, Christian Timmerer, Hermann Hellwagner, Toward Semantic Web Services for Multimedia Adaptation, In Web Information Systems - WISE 2004 (Xiaofang Zhou, Stanley Su, Mike Papazoglou, Maria Orlowska, Keith Jeffery, eds.), Springer, Berlin, Heidelberg, New York, pp. 641-652, 2004.
[bib] [doi] [abstract]
Abstract: Abstract. Universal Multimedia Access (UMA), where users can consume any multimedia resource anywhere at any time, is the driving vision of ongoing ISO/IEC Moving Picture Experts Group (MPEG) standardization efforts. In that context, intelligent adaptation means that before resources are sent over the network, they are prepared according to the client’s device capabilities, the network conditions, or even the user’s content preferences. In this paper, we argue that Semantic Web Services can serve as a key enabling technology to achieve the goals of UMA. As the standards evolve, more and more specialized software tools will be available that provide specific functionalities for adapting the media in different dimensions. When the functionality of such tools is described declaratively with the means of Semantic Web Services technology, intelligent adaptation network nodes can be developed, capable of automatically composing multi-step adaptation sequences and dynamically integrating such services available on the Web. This paper describes the architecture and a prototypical implementation of an intelligent adaptation node that supports automatic, knowledge-based service composition which is made possible by the shared domain ontology defined in MPEG metadata standards.
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[124] | Dietmar Jannach, Klaus Leopold, Hermann Hellwagner, An extensible framework for knowledge-based multimedia adaptation, In Proceedings of the 17th International Conference on Industrial & Engineering Applications of Artificial Intelligence & Expert Systems (Robert Orchard, Chunsheng Yang, Ali Moonis, eds.), Springer Verlag, Berlin [u. a.], pp. 144-153, 2004.
[bib] [abstract]
Abstract: Multimedia content is becoming increasingly important in many areas not only for pure entertainment but also for commercial or educational purposes like, e.g., distance learning or online training. In parallel, the rapid evolution in the hardware sector brought up various new (mobile) end user devices like pocket PCs or mobile phones that are capable of displaying such content. Due to the different capabilities and usage environments of these devices, the basic multimedia content has to be adapted in order to fit the specific devices' capabilities and requirements, whereby such transformations typically include changes in the display size or quality adaptation. Based on the capabilities of the target device that can be expressed using recent multimedia standards like MPEG-21, these adaptation steps are typically carried out by the video server or a proxy node before the data is transferred to the client. In this paper, we present a software framework and implementation of such a multimedia server add-on that advances state-of-the-art technology in two ways. First, the framework supports the integration of various (already existing) multimedia transformation tools based on declarative interface and semantic capability descriptions in a way comparable to Semantic Web Services approaches. Second, by using the components' capability descriptions and the usage environment of the end user device, we employ a knowledge-based planning approach for dynamically constructing and executing the needed transformation program for a specific multi-media content request.
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[123] | Dietmar Jannach, Klaus Leopold, Hermann Hellwagner, Christian Timmerer, A Knowledge Based Approach for Multi-step Media Adaptation, In Proceedings of the 5th International Workshop on Image Analysis for Multimedia Interactive Services (Fernando Pereira, Paulo Lobato Correia, eds.), Instituto Superior Téchnico, Lisboa, Portugal, pp. 1-4, 2004.
[bib] [pdf] [abstract]
Abstract: In order to enable transparent and augmented use of multimedia resources across a wide range of networks and devices, the forthcoming MPEG-21 standard aims at integrating the various existing technologies for delivery and consumption of digital content in a common multimedia framework. Digital Item Adaptation is one of the core concepts of the framework that will support the adaptation of multimedia resources to device capabilities, underlying network characteristics, or the users preferences. The scope of the standardization, however, is limited to the definition of description tools and does not deal with the internals of the adaptation process itself. In this paper, we first discuss the requirements of the resource adaptation component of an adaptation engine. These requirements include, for instance, openness for the integration of external multimedia transforming tools as well as intelligent decision taking when determining the set of required adaptation steps. We also present a prototype of a simple video resource adaptation engine that completely relies on descriptions of the resource itself (MPEG-7), the usage environment of the resource (MPEG-21), as well as declarative descriptions of the transformation tools. The prototype employs a knowledge-based engine for finding and executing the needed adaptation sequences.
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[122] | Balázs Goldschmidt, Tibnor Skaliczki, Laszlo Böszörmenyi, Placement of Nodes in an Adaptive Distributed Multimedia Server, In Eur-Par 2004, Parallel Processing (M Danelutto, D Laforenza, M Vanneschi, eds.), Springer, Pisa, Italy, pp. 776-783, 2004.
[bib] [abstract]
Abstract: Multimedia services typically need not only huge resources but also a fairly stable level of Quality of Services. This requires server architectures that enable continuous adaptation. The Adaptive Distributed Multimedia Server (ADMS) of the University Klagenfurt is able to dynamically add and remove nodes to the actual configuration, thus realizing the offensive adaptation approach. This paper focuses on the optimal placement of nodes for hosting certain ADMS components (the so-called data collectors, collecting and streaming stripe units of a video) in the network. We propose four different algorithms for host recommendation and compare the results gained by running their implementations on different test networks. The greedy algorithm seems to be a clear looser. Among the three other algorithms (particle swarm, linear programming and incremental) there is no single winner of the comparison, they can be applied in a smart combination.
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[121] | Robbie De Sutter, Christian Timmerer, Hermann Hellwagner, Rik Van de Walle, Evaluation of Models for Parsing Binary Encoded XML-based Metadata, In Proceedings of the International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS2004) (Sung Jea Ko, ed.), IEEE, Piscataway, USA, pp. 1-6, 2004.
[bib] [pdf] [abstract]
Abstract: In multimedia applications, XML is being increasingly used to represent metadata; examples are MPEG-7 multimedia description schemes and MPEG-21 usage environment descriptions. As with the media data, the size of, or the overhead induced by, the XML metadata is important, particularly when used on constrained mobile devices. Therefore, compression (binary encoding) of the XML data becomes relevant to reduce this overhead. Within the MPEG-7 standardization effort, a Binary Format for Metadata (BiM) was developed, providing good compression efficiency and facilitating random access into, and manipulation of, the binary encoded bit stream. In order to support processing of metadata streams in the binary domain and making this task for client applications as simple as possible, we are developing a universal parser for handling both plain text and binary encoded XML-based metadata. The parser exposes a single interface making it transparent for the application whether a plain text or a binary XML document is being processed. As part of this effort, this paper provides a detailed study of five existing XML parser models and evaluates their applicability to serve as a model for parsing binary XML data, encoded using the BiM codec. Additionally, the parser models are investigated against important usage scenarios enabled by BiM, such as dynamic updates of XML data. From the five models, two are rejected and one is only applicable for domain specific applications. Of the remaining two, one model is proposed as preferred model because of different advantages over the other model.
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[120] | Roland Tusch, Laszlo Böszörmenyi, Balázs Goldschmidt, Hermann Hellwagner, Peter Schojer, Offensive and Defensive Adaptation in Distributed Multimedia Systems, In Proceedings of ICETA 2003, 2nd International Conference on Emerging Telecommunications Technologies and Applications (F Jakab, A Cizmar, eds.), Elfa, Košice, Slovak Republic, pp. 17-19, 2003.
[bib] [abstract]
Abstract: Adaptation is usually restricted to defensive, reactive media adaptation (often called stream-level adaptation). We argue that offensive, proactive, system-level adaptation deserves not less attention. If a distributed multimedia system cares for overall, end-to-end quality of service then it should provide a meaningful combination of both. We introduce an adaptive multimedia server (ADMS) and a supporting middleware which implement offensive adaptation based on a lean, flexible architecture. The measured costs and benefits of the offensive adaptation process are presented. We introduce an intelligent video proxy (QBIX), which implements defensive adaptation. The cost/benefit measurements of QBIX are presented elsewhere \citeSchojer03. We show the benefits of the integration of QBIX in ADMS. Offensive adaptation is used to find an optimal, user-friendly configuration dynamically for ADMS, and defensive adaptation is added to take usage environment (network and terminal) constraints into account.
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[119] | Roland Tusch, Towards an Adaptive Distributed Multimedia Streaming Server Architecture Based on Service-oriented Components, In Modular Programming Languages. Joint Modular Languages Conference, JMLC 2003, Klagenfurt, Austria, August 25-27, 2003, Proceedings (Peter Schojer, Laszlo Böszörmenyi, eds.), Springer, Berlin, Heidelberg, New York, pp. 78-87, 2003.
[bib][url] [abstract]
Abstract: Abstract. This paper presents an adaptive distributed multimedia streaming server architecture (ADMS) which explicitly controls the serverlayout. It consists of four types of streaming server components, which all provide dedicated services in an arbitrary number of instances on an arbitrary number of server hosts. Vagabond2 is used as the underlying middleware for component adaptation. It is shown, how the CORBA-based components have to be declared in order to run on top of Vagabond2. Finally, inter-component dependencies are pointed out, which have to be taken into account during component adaptations.
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[118] | Roland Tusch, Christian Spielvogel, Michael Kröpfl, Laszlo Böszörmenyi, An Adaptive Distributed Multimedia Streaming Server in Internet Settings, In Proceedings of Information Technologies and Communications (ITCom), Internet Multimedia Management Systems IV, Orlando, USA (S Panchanathan, T Zhang, JR Smith, eds.), SPIE, Orlando, pp. 312-323, 2003.
[bib][url] [abstract]
Abstract: We present an adaptive distributed multimedia server architecture (ADMS) that builds upon the idea of offensive adaptivity, where the server proactively controls its layout through replication or migration of server components to recommended hosts. Proactive actions are taken when network or server resources become critical when fulfilling client demands. Recommendations are provided by a so-called host recommender which represents an integral part of Vagabond2 - the middleware used for component distribution. Recommendations are based on measured or estimated server and network resource availabilities. Network distance and host resource metrics - obtained from network and host resource services respectively - may be communicated as MPEG-21 DIA descriptors. Finally we evaluate our architecture in a real-world streaming scenario.
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[117] | Christian Timmerer, Gabriel Panis, Harald Kosch, Jörg Heuer, Hermann Hellwagner, Andreas Hutter, Coding format independent multimedia content adaptation using XML, In Proceedings of SPIE International Symposium ITCom 2003 on Internet Multimedia Managment Systems IV, Vol. 5242 (A N, ed.), SPIE Press, Orlando, pp. 92-103, 2003.
[bib] [pdf] [abstract]
Abstract: Due to the heterogeneity of the current terminal and network infrastructures, multimedia content needs to be adapted to specific capabilities of these terminals and network devices. Furthermore, user preferences and user environment characteristics must also be taken into consideration. The problem becomes even more complex by the diversity of multimedia content types and encoding formats. In order to meet this heterogeneity and to be applicable to different coding formats, the adaptation must be performed in a generic and interoperable way. As a response to this problem and in the context of MPEG-21, we present an approach which uses XML to describe the high-level structure of a multimedia resource in a generic way, i.e., how the multimedia content is organized, for instance in layers, frames, or scenes. For this purpose, a schema for XML-based bitstream syntax descriptions (generic Bitstream Syntax Descriptions or gBSDs) has been developed. A gBSD can describe the high-level structure of a multimedia resource in a coding format independent way. Adaptation of the resource is based on elementary transformation instructions formulated with respect to the gBSDs. These instructions have been separated from the gBSDs in order to use the same descriptions for different adaptations, e.g., temporal scaling, SNR scaling, or semantic adaptations. In the MPEG-21 framework, those adaptations can be steered for instance by the network characteristics and the user preferences. As a result, it becomes possible for coding format agnostic adaptation engines to transform media bitstreams and associated descriptions to meet the requirements imposed by the network conditions, device capabilities, and user preferences.
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[116] | Peter Schojer, Laszlo Böszörmenyi, Hermann Hellwagner, Bernhard Penz, Stefan Podlipnig, Architecture of a Quality Based Intelligent Proxy (QBIX) for MPEG-4 Videos, In The Twelfth International World Wide Web Conference (Gusztáv Hencsey, Bebo White, eds.), ACM, New York, USA, pp. 394-402, 2003.
[bib][url] [abstract]
Abstract: Due to the increasing availability and use of digital video data on the Web, video caching will be an important performance factor in the future WWW. We propose an architecture of a video proxy cache that integrates modern multimedia and communication standards. Especially we describe features of the MPEG-4 and MPEG-7 multimedia standards that can be helpful for a video proxy cache. QBIX supports real-time adaptation in the compressed and in the decompressed domain. It uses adaptation to improve the cache replacement strategies in the proxy, but also to realize media gateway functionality driven by the clients' terminal capabilities.
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[115] | Stefan Podlipnig, Laszlo Böszörmenyi, A survey of Web cache replacement strategies, In ACM Computing Surveys (CSUR), ACM, vol. Volume 35 , Issue 4, New York, USA, pp. 374 - 398, 2003.
[bib] [abstract]
Abstract: Web caching is an important technique to scale the Internet. One important performance factor of Web caches is the replacement strategy. Due to specific characteristics of the World Wide Web, there exist a huge number of proposals for cache replacement. This article proposes a classification for these proposals that subsumes prior classifications. Using this classification, different proposals and their advantages and disadvantages are described. Furthermore, the article discusses the importance of cache replacement strategies in modern proxy caches and outlines potential future research topics.
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[114] | Gabriel Panis, Andreas Hutter, Jörg Heuer, Hermann Hellwagner, Harald Kosch, Christian Timmerer, Sylvain Devillers, Myriam Amielh, Bitstream Syntax Description: A Tool for Multimedia Resource Adaptation within MPEG-21, In Signal Processing: Image Communication, Elsevier B.V., vol. Vol. 18, Special Issue on Multimedia Adaptation, no. 8, Amsterdam, Netherlands, pp. 721-747, 2003.
[bib] [pdf] [abstract]
Abstract: In this paper, a generic method is described to allow the adaptation of different multimedia resources by a single, media resource-agnostic processor. This method is based on an XML description of the media resources bitstream syntax, which can be transformed to reflect the desired adaptation and then be used to generate an adapted version of the bitstream. Based on this concept, two complementary technologies, BSDL and gBS Schema, are presented. The two technologies provide solutions for parsing a bitstream to generate its XML description, for the generic structuring of this description, and the generation of an adapted bitstream using its transformed description. The two technologies can be used as stand-alone tools; however, a joint approach has been developed in order to harmonise the two solutions and exploit their strengths. Since BSDL has been presented in previous publications, this paper is focusing more on the gBS Schema and the joint BSDL/gBS Schema approach.
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[113] | Mathias Ohlenroth, Hermann Hellwagner, A Protocol for Adaptation-aware Multimedia Streaming, In ICME 2003 Proceedings CD-Rom (Billene Mercer, St Cantu, Ch Garza, B Stewart, eds.), NA, NA, pp. 1-4, 2003.
[bib] [pdf] [abstract]
Abstract: Multimedia streaming is becoming ever more popular. However, the Internet does not support streaming with its high bandwidth and low latency requirements very well. The problem is that QoS guarantees cannot be given. Hence, communication partners have to deal with rapidly changing connection parameters. This requires sophisticated streaming concepts that can handle these varying conditions using adaptation techniques. Adaptation methods can be dropping layers, dropping access units or transcoding the contents. But this places specific requirements on the underlying protocol. This paper identifies and discusses these requirements and analyzes how existing protocols can meet them. Unfortunately, none of the known protocols can meet all requirements. Hence, we propose a new adaptation-aware multimedia streaming protocol that can operate as required in the given Internet environment. Furthermore, we show how this protocol can be used to carry MPEG-4 audio-visual contents.
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[112] | Klaus Leopold, Hermann Hellwagner, Michael Kropfberger, QCTVA - Quality Controlled Temporal Video Adaptation, In Proc. of SPIE (A N, ed.), NA, NA, pp. 163-174, 2003.
[bib] [pdf] [abstract]
Abstract: Multimedia streaming is becoming more and more popular. Seamless video streaming in heterogeneous networks like the Internet turns out as almost impossible due to varying network conditions - streams must be adapted to the current network QoS. Temporal scalability is one of the most reasonable adaptation techniques because it is fast and easy to perform. Today's approaches simply drop frames out of a video without spending much effort on finding an intelligent dropping behavior. This usually leads to good adaptation results in terms of bandwidth consumption but also to suboptimal video quality within the given bounds. Our approach offers analysis of video streams to achieve the qualitatively best temporal scalability. For this reason, we introduce a data structure called modification lattice which represents all frame dropping combinations within a sequence of frames. On the basis of the modification lattice, qualityestimations on frame sequences can be performed. Moreover, a heuristic for fast and efficient quality computation in a modification lattice is presented. Experimental results illustrate that temporal video adaptation based on QCTVA information leads to a better video quality compared to "usual" frame dropping approaches. Furthermore, QCTVA offers frame priority lists for videos. Based on these priorities, numerous adaptation techniques can increase their overall performance when using QCTVA.
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[111] | Harald Kosch, Hermann Hellwagner, Laszlo Böszörmenyi, eds., Euro-Par 2003, Parallel Processing, Springer Verlag, Heidelberg, pp. 1320, 2003.
[bib][url] [abstract]
Abstract: Euro-Par is the annual series of international conferences dedicated to the promotion and advancement of all aspects of parallel and distributed computing. The conference normally attracts more than 300 participants coming from universities, research centres and industry.
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[110] | Harald Kosch, Jörg Heuer, MPEG-7 Aktuelles Schlagwort, In Informatik Spektrum, Springer, vol. 26, no. 2, Heidelberg, pp. 164, 2003.
[bib][url] [abstract]
Abstract: Die Moving Picture Experts Group, eine Arbeitsgruppe der ISO SC29, ist seit 1988 aktiv und hat mit ihren MPEG-1/2/4 einen entscheidenden Einfluss auf die Multimedia-Industrie genommen.Mit der Verabschiedung MPEG-7 wurde von der Moving Picture Experts Group (MPEG) im März 2002 als Internationaler Standard verabschiedet. Nach der erfolgreichen Einführung der Standards MPEG-1/2/4 zur audiovisuellen Kodierung von Inhalten ist MPEG-7 ein Standard, der ein Austauschformat für Beschreibungen von multimedialen Inhalten festlegt.
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[109] | Mario Döller, Harald Kosch, An MPEG-7 Multimedia Data Cartridge, In SPIE Conference on Multimedia Computing and Networking 2003 (MMCN03), Santa Clara, CA, January 29-31, 2003 (Ragunathan Rajkumar, ed.), SPIE, Santa Clara, USA, pp. 240, 2003.
[bib][url] [abstract]
Abstract: Broadly used Database Management Systems (DBMS) are not able to tackle the requirements of multimedia in querying, indexing and content modeling. Therefore, extenders for multimedia data types have been proposed. These extensions, however, offer only limited semantic modeling and rely on basic index structures which do not meet the whole nature of multimedia, for instance for a Nearest-Neighbor Search. In this context, the paper presents a methodology for enhancing extensible ORDBMS for multimedia data. In particular, we introduce an MPEG-7 Multimedia Data Cartridge which includes a semantically rich metadata model for multimedia content relying on the MPEG-7 standard. Furthermore, to fulfill the needs for efficient multimedia query processing, we created in this Cartridge a new indexing and query framework for various types of retrieval operations
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[108] | Laszlo Böszörmenyi, Harald Kosch, Hermann Hellwagner, Best papers of EuroPar 2003, In Parallel Processing Letters, Springer, vol. 13, no. 4, Heidelberg, Germany, pp. 509-511, 2003.
[bib] |
[107] | Laszlo Böszörmenyi, Hermann Hellwagner, Harald Kosch, Mulugeta Libsie, Stefan Podlipnig, Metadata Driven Adaptation in the ADMITS Project, In Signal Processing - Image Communication - Special Issue on Multimedia Adaptation, Elsevier, vol. Vol. 18, no. Issue 8, Oxford, United Kingdom, pp. 749-766, 2003.
[bib][url] [abstract]
Abstract: The ADMITS project (Adaptation in Distributed Multimedia IT Systems) is building an experimental distributed multimedia system for investigations into adaptation, which we consider is an increasingly important tool for multimedia systems. A number of possible adaptation entities (server, proxy, clients, routers) are being explored, different algorithms for media, component and application-level adaptations are being implemented and evaluated, and experimental data are being derived to gain insight into when, where and how to adapt, and how individual, distributed adaptation steps interoperate and interact with each other. In this paper the "adaptation-chain" of (MPEG-conforming) metadata based adaptation is described: from the creation stage at the server side, through its usage in the network (actually in a proxy), up to the consumption at the client. The metadata are used to steer the adaptation processes. MPEG-conformant metadata, the so-called variation descriptions, are introduced; an example of a complete MPEG-7 document describing temporal scaling of an MPEG-4 video is given. The meta-database designed to store the metadata is briefly discussed. We describe how the metadata can be extracted from MPEG-4 visual elementary streams and initial results from the temporal video scaling experiment are given. We further present how the metadata can be utilized by enhanced cache replacement algorithms in a proxy server in order to realize quality-based caching; experimental results using these algorithms are also given. Finally, an adaptive query and presentation interface to the meta-.
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[106] | Laszlo Böszörmenyi, Stefan Podlipnig, eds., People behind Informatics, Eigenverlag Universität Klagenfurt, Klagenfurt, pp. 121, 2003.
[bib][url] [abstract]
Abstract: In memory of Ole-Johan Dahl, Edsger Wybe Dijkstra and Kristen Nygaard. Science is done by people. No matter how trivial this sounds, this is often forgotten, especially in the case of technical sciences such as informatics. In this book we attempt to give a short overview of the life and scientific work of three great computing scientists: Ole-Johan Dahl, Edsger W. Dijkstra and Kristen Nygaard. All three were born around the beginning of the 1930s and died in 2002. All three were among the brightest stars of early informatics (or computing science).
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[105] | Laszlo Böszörmenyi, Peter Schojer, eds., Modular Programming Languages Joint Modular Language Conference, JMLC 2003, Springer Verlag, Heidelberg, pp. 270, 2003.
[bib] [abstract]
Abstract: The mission of JMLC is to explore the concepts of well-structured programming languages and software, and those of teaching good design and programming style. We are especially interested in the construction of large and distributed software systems. We also invite papers on software engineering aspects in new and dynamic application areas, such as multimedia and pervasive systems.
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[104] | Laszlo Böszörmenyi, Roland Tusch, Inhaltsbasierte Suche in Videoarchiven, In Suchbilder. Visuelle Kultur zwischen Algorithmen und Archiven (Ernst Heidenreich, ed.), Kulturverlag Kadmos, Berlin, pp. 67-75, 2003.
[bib] [abstract]
Abstract: Bei der Indizierung von Videoarchiven haben im allgemeinen bessere Ergebnisse einen höheren Preis. Automatische Indizierung, basierend auf physikalischen Eigenschaften, kann für viele Bereiche (wie z.B. ein Grossteil der Unterhaltung) ausreichend gute Ergebnisse erzielen. Sie ist allerdings in der Genauigkeit der Fragestellungen eingeschränkt, und zwingt uns oft unbewusste Suchkriterien auf. Wenn es uns wichtig ist, auf fein differenzierte Fragen genaue Antworten zu erhalten (wie das z.B. in wissenschaftlich/technischen Systemen meistens der Fall ist), so sind wir auf eine zumindest teilweise manuelle Annotierung angewiesen. In einem kombinierten System wie dem VIDEX-Modell können die physikalischen Eigenschaften dazu benutzt werden, den manuellen Annotierungsprozess zu erleichtern. Kombinierte Systeme dieser Art bieten beide Arten der Indizierung an und kombinieren sie miteinander. Längerfristig ist zu erwarten, dass sich zu jeder Anwendung die angemessenen Indizierungs- und Suchmethoden herausstellen. Die zwei Verfahren das automatische und das teils manuelle sollten nicht als Gegner, sondern als Partner angesehen werden.
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[103] | Laszlo Böszörmenyi, Roland Tusch, Balázs Goldschmidt, A Mobile Agent-based Infrastructure for an Adaptive Multimedia Server, Technical report, Institute of Information Technology (ITEC), Klagenfurt University, Klagenfurt, Austria, pp. 12, 2003.
[bib] [abstract]
Abstract: This paper introduces a mobile agent-based infrastructure for an adaptive multimedia server enabling a dynamic migration or replication of certain multimedia applications among a set of available server nodes. It discusses the requirements from both, the servers and the middlewares point of view to each other and comes up with a specification and implementation of a CORBA-based interface between them.
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