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检索条件"任意字段=Multimedia Content Access: Algorithms and Systems III"

共 293 条记录，以下是181-190 订阅

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An architecture of automating production of cross media content for multi-channel distribution

An architecture of automating production of cross media cont...

引用

1st International Conference on Automated Production of Cross Media content for Multi-Channel Distribution

作者： Bellini, P Nesi, P Univ Florence DISIT DSI Distributed Syst & Internet Technol Lab I-50139 Florence Italy

ISBN: (纸本)076952348X

The digital-content market is urging better pricing and value-for-money for industry products and services. This is clearly evident in the recent price policies of majors. Production costs must be drastically reduced without affecting product quality. content providers, aggregators and distributors constantly need to adopt innovative means of increasing efficiency in order to reduce cost. Possible solutions to this challenge could be found by automating, accelerating and restructuring production processes. AXMEDIS architecture and tools aim at reaching those results by: (i) reducing costs for content production with artificial intelligence algorithms for content composition, formatting, protection and workflow management, (ii) reducing distribution and integration costs, increasing accessibility, with a P2P platform at B2B level integrating content management systems and workflows, (iii) providing algorithms and tools for innovative and flexible Digital Rights Management, exploiting MPEG-21 and overcoming its limits, supporting several business and transactions models. AXMEDIS is a large IST FP6 Integrated Project on Research and Development.

关键词： multimedia systems

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On the management of aggregation networks with rapidly moving traffic demands

On the management of aggregation networks with rapidly movin...

引用

9th IFIP/IEEE International Symposium on Integrated Network Management (IM 2005)

作者： Van Quickenborne, F De Greve, F State Univ Ghent Dept Informat Technol INTEC B-9000 Ghent Belgium

ISBN: (纸本)0780390873

In this paper, the focus is on the management aspects for delivery of multimedia services to fast moving users (e.g., users in trains, cars or airplanes). The considered network architecture consists of two parts: an aggregation network part and an access network part. We designed a management system for the aggregation network. The main functionalities of this management system are: (i) pre-configuration of the QoS (Quality of Service) tunnels, based on the results of the network capacity planning process, (ii) activation of the QoS tunnels when required and (iii) tunnel reconfiguration when the activated tunnels are unsufficient to carry the instantaneous demand or in case of other failures. The main difference with existing management systems is that it is designed to deal with the rapidly moving nature of the traffic conditions and the generation of triggers for tunnel activations or reconfigurations. The management system focuses on multimedia service delivery to trains through high speed Ethernet aggregation networks. An extended GVRP (GARP (Generic Attribute Registration Protocol) VLAN Registration Protocol) and a new GARP protocol (G2RP) were designed and implemented as protocols for the automatic tunnel pre-configuration and activation, respectively. The management system makes use of optimization algorithms for network dimensioning and tunnel path determination. These algorithms will be described in detail and their evaluation results will be compared for a basic train scenario. Finally, measurement results on the performance of the designed protocols for tunnel pre-configuration and activation, are presented in detail.

关键词： multimedia traffic dimensioning optimization tunnel management GVRP G2RP

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Ontology-Based access to multimedia Cultural Heritage Collections - The REACH Project

Ontology-Based Access to Multimedia Cultural Heritage Collec...

引用

Eurocon

作者： C. Doulaverakis Y. Kompatsiaris M.G. Strintzis Centre for Research and Technology Informatics and Telematics Institute Thessaloniki Greece Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

In this paper, an approach for providing unified access to heterogeneous distributed cultural heritage collections is presented. The proposed approach is developed within the framework of the REACH Greek National Project with the overall aim to provide a Web portal enabling access to different databases of cultural content with emphasis on multimedia material. In order to achieve this, the project employs ontology-based representation of cultural content, multimedia content-based search algorithms, hybrid ontology and content-based access and user-friendly search interfaces. This fusion approach provides users with resources for building queries of multimedia repositories sequentially using multiple individual search tools, and performs higher quality searching. In the current stage of development, real content such as inscriptions and coins from the Greco-Roman time period, has successfully been incorporated in the system

关键词： Ontologies Cultural differences Portals multimedia databases Information retrieval content based retrieval Material storage multimedia systems Informatics Telematics

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content Understanding for Smart multimedia systems

Content Understanding for Smart Multimedia Systems

引用

Eurocon

作者： J.F. Tasic U. Burnik M. Ansorge J. Cid-Sueiro Faculty of Electrical Engineering University of Ljubljana Slovenia University of Neuchatel Neuehatel Switzerland University Carlos III Madrid Spain

The paper is presenting a core idea of the research line, dedicated to tools and utilities for a more friendly information access. In order to make future multimedia systems smarter, new mechanisms for high-level data... 详细信息

关键词： multimedia systems multimedia communication Data mining Communications technology Ontologies Object detection Event detection Layout Supply and demand Production

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Integrated multi-objective cross-layer optimization for wireless multimedia transmission

Integrated multi-objective cross-layer optimization for wire...

引用

IEEE International Symposium on Circuits and systems (ISCAS)

作者： M. van der Schaar M. Tekalp UC Davis Electrical and Computer Engineering Davis CA USA

Many cross-layer design approaches for wireless multimedia transmission over various networks have been proposed. Truly cross-layer design solutions require joint optimization of multimedia coding, transport/network layer, medium access layer, and physical layer transmission strategies and protocols. The solution often becomes impractical because: (i) its computational complexity is high; and (ii) it needs to be recomputed as some inputs, such as the content characteristics or network conditions change. To this effect, we propose a novel framework for cross-layer design, which features: (i) the joint design strategy selection being adaptive not only to network conditions but also to multimedia content characteristics; (ii) the joint design strategy selection being based on off-line learning to address the computational complexity issue; and (iii) the off-line learning stage employing a new multiple objective optimization solution.

关键词： Streaming media Cross layer design Physical layer Design optimization Optimization methods Computational complexity Quality of service Open systems Media access Protocol Channel coding

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New stream caching schemas for multimedia systems

New stream caching schemas for multimedia systems

引用

International Conference on Automated Production of Cross Media content for Multi-Channel Distribution (AXMEDIS)

作者： J. Fernandez J. Carretero F. Garcia-Carballeira A. Calderon J.M. Perez-Menor Computer Science Department Computer Architecture Group Universidad Carlos III de Madrid Madrid Spain

In this paper a new multimedia caching strategy is proposed that includes several optimizations to the state of the art. This algorithm takes its roots from the interval caching algorithms but it evolves towards a more adaptive approaching that could obtain a better performance for variable bit-rate streams and serving media stored on multiple disks following different distributions. All of this without loosing competitiveness for constant bit-rate streams on a single disk. All this efforts are oriented towards the consecution of MUPIC (multi policy integrated cache), a cache architecture designed to fit the requirements of an integrated storage system that meet the requirements of deterministic applications, multimedia systems, and traditional best-effort applications altogether.

关键词： Streaming media multimedia systems Application software Computer architecture Computer science Cache storage Processor scheduling Scheduling algorithm Real time systems Runtime

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An architecture of automating production of cross media content for multi-channel distribution

An architecture of automating production of cross media cont...

引用

International Conference on Automated Production of Cross Media content for Multi-Channel Distribution (AXMEDIS)

作者： P. Bellini P. Nesi DISIT University of Florence Via S. Marta Florence Italy

The digital-content market is urging better pricing and value-for-money for industry products and services. This is clearly evident in the recent price policies of majors. Production costs must be drastically reduced without affecting product quality. content providers, aggregators and distributors constantly need to adopt innovative means of increasing efficiency in order to reduce cost. Possible solutions to this challenge could be found by automating, accelerating and restructuring production processes. AXMEDIS architecture and tools aim at reaching those results by: (i) reducing costs for content production with artificial intelligence algorithms for content composition, formatting, protection and workflow management, (ii) reducing distribution and integration costs, increasing accessibility, with a P2P platform at B2B level integrating content management systems and workflows, (iii) providing algorithms and tools for innovative and flexible digital rights management, exploiting MPEG-21 and overcoming its limits, supporting several business and transactions models. AXMEDIS is a large IST FP6 Integrated Project on Research and Development.

关键词： Grid computing multimedia systems Resource management content management multimedia computing Distributed computing Production systems Marketing and sales Acceleration Optimization methods

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Moving away from narrow-scope solutions in multimedia content analysis

Moving away from narrow-scope solutions in multimedia conten...

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The 2nd European Workshop on the Integration of Knowledge, Semantics and Digital Media Technology, 2005. EWIMT 2005. (Ref. No. 2005/11099)

作者： A. Hanjalic J. Nesvadba J. Benois-Pineau Department of Mediamatics Delft University of Technnology Delft Netherlands Storage Systems and Applications Group Philips Research Eindhoven Netherlands Labri UMR CNRS 5800 University of Bordeaux 1 France

Recent research results in the field of multimedia content Analysis (MCA) have been marked by an abundance of theoretical and algorithmic solutions covering narrow application domains only. In this paper we analyze this tendency and its origin in more detail and explain why, in our view, this should not be considered "the way to go" in providing easy access to content in multimedia systems and applications of the future. In particular, we concentrate on the case study of digital video, which we see as a straightforward example of multimedia. Through this case study we will discuss the needs and challenges of improving the generic potential of MCA algorithms.

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Adaptive filtering for delivering multimedia services in W-CDMA cellular networks using genetic algorithms

Adaptive filtering for delivering multimedia services in W-C...

引用

International Conference on Wireless Networks, Communications and Mobile Computing

作者： F. De Angelis I. Habib City College City University of New York USA

This paper presents an adaptive filtering algorithm for the delivery of multimedia content with different quality of service (QoS) requirements in time-varying wideband code-division multiple access (W-CDMA) cellular networks. The algorithm objective is to guarantee levels of quality for two different user defined profiles (premium, or economy), while attempting to maximize the allocation of the radio channel bandwidth and maintaining the QoS requirements of downloaded traffic flows (audio, video, and data). Our proposed solution is based upon utilizing genetic algorithms (GAs) to solve a multi-objective function that selects, during a control period, the bit rates and formats for the media codecs of downloaded traffic flows and assigns the air interface channel rate and power to each user, subject to different constraints. To show the performance of the algorithm, W-CDMA systems with and without filtering capabilities are compared.

关键词： Adaptive filters Multiaccess communication Land mobile radio cellular systems Genetic algorithms Quality of service Filtering algorithms Wideband Bandwidth Communication system traffic control Bit rate

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Evaluation of a monitoring-based architecture for delivery of high quality multimedia content

Evaluation of a monitoring-based architecture for delivery o...

引用

IEEE Symposium on Computers and Communications (ISCC)

作者： J. Coppens T. Wauters F. De Turck B. Dhoedt P. Demeester Department of Information Technology (INTEC) Ghent University IMEC Ghent Belgium

Currently, a lot of research has been devoted to (i) content distribution, (ii) traffic engineering, (iii) network monitoring and (iv) service enabling platforms. However, the integration of these four individual concepts in a single platform has not yet been studied in enough detail. In this paper we present an architecture for such a robust content delivery service. The combination of both distributed replication of videos and multi-source traffic engineering tackles specific problems such as congested network parts, overloaded servers and the occurrence of flash crowds. Contrary to most existing systems, the content placement and retrieval algorithms in the presented CDN obtain precise network state information from an integrated monitoring system, allowing even a higher efficiency. To validate the performance of the CDN, an exact placement ILP formulation and various RPA heuristics are implemented and simulated.

关键词： Monitoring Network servers content based retrieval Telecommunication traffic Videos Information retrieval Quality of service Bandwidth Robustness Current measurement

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