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检索条件"任意字段=Conference on Multimedia Content Access - Algorithms and Systems"

共 2015 条记录，以下是1461-1470 订阅

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A segmentation-based approach to delivering multimedia files in content distribution networks

A segmentation-based approach to delivering multimedia files...

引用

IEEE International conference on Communications (ICC)

作者： Mengkun Yang Zongming Fei Department of Computer Science University of Kentucky Lexington KY USA

ISBN: (纸本)0780385330

In this paper we propose a novel segmentation-based approach for delivering multimedia files in content distribution networks. Each media file is divided into segments and the number of copies distributed to replica servers for each segment is designed in such a way that we can reduce the storage requirement at the replica servers, accommodate the bursty arrival of client requests, and at the same time achieve a small latency for the clients. We analyze the effect of the size of segments on the total storage requirement and give a lower bound. We design a scheduling algorithm that can take advantage of the increased capacity of access links of clients. Our simulations show that the segmentation-based approach can reduce the latency and the rejection rate significantly over those approaches that deliver the whole or the prefix part of media files to replica servers.

关键词： Intelligent networks Streaming media File servers multimedia systems Network servers Delay Scheduling algorithm Computer science Algorithm design and analysis Computer aided instruction

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A framework for analysing interactivity in a remote access field exploration system

A framework for analysing interactivity in a remote access f...

引用

IEEE International conference on systems, Man and Cybernetics

作者： S. Joel J.L. Arnott N. Hine S. Ingvarsson R. Rentoul S. Schofield Division of Applied Computing Dundee University Dundee Scotland

The research described in this paper is the investigation of interactivity between learners and system in the context of remote access to educational field explorations (field trips). The concept is described generically as remote access field trip (RAFT). The interactivity framework proposed for assessing RAFT considers it within the context of live distance education and needs to be judged in terms of set interaction criteria, e.g. learner & learner, learner & instructor, learner & content and learner & interface. This paper proposes that criteria for distance learning interaction assessment should consider also how the leaner interacts with a pervasive interface. This is particularly relevant in this context because the system involves participants interacting with a pervasive system within a live field trip experience, and creates a unique human-system interaction in the educational domain.

关键词： Computer aided instruction Pervasive computing Distance learning Man machine systems Machine learning Security Costs Educational institutions Computer graphics multimedia systems

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Dynamic navigation into 3D media spaces

Dynamic navigation into 3D media spaces

引用

International IEEE conference on Intelligent systems, IS

作者： C. St-Jacques L.-C. Paquin M. Lavallee School of Information Technology and Engineering University of Ottawa Ottawa ONT Canada Department of Communication Université du Québec à Montréal Montreal QUE Canada

The Teleweb project aims to provide a friendly online access to large multimedia databases which constitute a "media space". This work presents the design of an ergonomic interface joining the own interactor's visual computing skills to the soft computing capability of fuzzy logic to model the proximity relationship of the media. Tiles mapped into a 3D topological representation. While the cybernetics of semantics is given by an automated representation of the data, the interactor is engaged in an immersive environment created dynamically from his requests controlling his own navigation in the media space.

关键词： Navigation Ergonomics Fuzzy logic multimedia databases Computer interfaces Cybernetics content based retrieval Internet Search engines Indexing

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Canadian conference on Electrical and Computer Engineering 2004 (IEEE Cat. No.04CH37513)

Canadian Conference on Electrical and Computer Engineering 2...

引用

Canadian conference on Electrical and Computer Engineering (CCECE)

The following topics are dealt with: OFDM; mobile networks; optical networks; VLSI design; image and video processing; power systems; security applications; signal processing algorithms; software engineering; MIMO systems; fading channels and equalizers; quality of service; high speed circuits; circuits and applications; multimedia signal processing; power quality; optical wireless access networks; modulation and coding; CDMA; wireless LAN; switching, routing and networking; abstraction, modelling and simulation; watermarking and retrieval; speech and audio processing; transmission and distribution systems; computer architecture; ad-hoc networks; biomedical signal and image analysis; power converters and motor drives; embedded systems; fuzzy systems and neural networks; FPGA and system on chip; radio resource management in next generation wireless networks; space time coding; internetworking and protocols; RF circuits; information and intelligent systems; power systems stability and renewable energy systems; control systems; electric machines; communications; robotics; agent-based systems.

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An improved music representation method by using harmonic-based chord decision algorithm

An improved music representation method by using harmonic-ba...

引用

IEEE International conference on multimedia and Expo (ICME)

作者： Chuan-Wang Chang H.C. Jiau Department of Electrical Engineering National Cheng Kung University Tainan City Taiwan

We develop an algorithm for chord decision for monophonic music, and it can be applied to music indexing and automatic composition systems. The basic ideas of the proposed algorithm can be divided into two phases: the local recognition phase and the global decision phase. The algorithm analyzes the music and assigns a set of chord candidates in the local recognition phase, while deciding the best appropriate chord according to the chord progression rules in the global decision phase. In order to improve the perceptual accuracy, we consider the beat of corresponding notes in a measure and eliminate the effect of the passing notes and ornaments

关键词： Multiple signal classification Indexing Data mining Partitioning algorithms Cities and towns Electronic mail Algorithm design and analysis Research and development Music information retrieval content based retrieval

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MITv - a solution for an interactive TV based on IP multicast over satellite

MITv - a solution for an interactive TV based on IP multicas...

引用

IEEE International conference on multimedia and Expo (ICME)

作者： L. Lancerica L. Dairaine F. de Belleville H. Thalmensy C. Fraboul

MITv is a proposition for interactive television to be deployed using an association of current distribution television systems (e.g., satellite DVB-S, cable DVB-T, TV over xDSL, etc.) and classical Internet infrastructure. MITv makes use of the natural association between broadcasted TV programs and associated interactive contents to manage replication of those contents over an ad-hoc infrastructure. The replication phase can be based on IP multicast over satellite service, providing a high performance and realistic way to convey the interactive content over the geographically distributed replication units. The proximity between replication units and end-users then allow a very high quality for interactive media presentation by way of an access network such as xDSL. The MITv system was entirely developed and tested in real conditions through a satellite/xDSL network emulator.

关键词： Satellite broadcasting TV broadcasting Quality of service Digital video broadcasting Cable TV Costs Web and internet services multimedia communication Digital audio broadcasting Power cables

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An application for interactive video abstraction

An application for interactive video abstraction

引用

International conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Sangkeun Lee M.H. Hayes Center of Signal and Image Processing Georgia Institute of Technology Atlanta GA USA

This paper proposes a novel system that can automatically create an optimal and nonrepetitive summarization and support different user requirements for video browsing and content overview by outputting both the optimal set of key frames and a summarized version of the original video with the user-specified time length. Comparing our approach to video abstraction with another algorithm, we demonstrate that our approach is fast and produces an effective video summary.

关键词： Streaming media Clustering algorithms Video sequences Watches Signal processing Image processing Production multimedia systems Software libraries Layout

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Streaming applications over HSDPA in mixed service scenarios

Streaming applications over HSDPA in mixed service scenarios

引用

IEEE conference on Vehicular Technology (VTC)

作者： M. Lundevall B. Olin J. Olsson N. Wiberg S. Wanstedt J. Eriksson F. Eng Ericsson Research Limited Stockholm Sweden Ericsson Research Limited Linkoping Sweden Ericsson Research Limited Lulea Sweden Division of Communication Systems Department of Electrical Engineering Linköping Universitet Sweden

High-speed downlink packet access (HSDPA) is included in release 5 of the WCDMA specifications to increase downlink capacity and bitrates. This paper considers performance aspects of streaming applications over HSDPA in a mixed streaming and best-effort service scenario. Different scheduling algorithms are evaluated with the aim of providing sufficient quality-of-service for streaming. The simulation results show that reasonable streaming performance can be achieved without service differentiation if a somewhat fair scheduler is used, and that a streaming-aware scheduler further can protect streaming quality-of-service in high load conditions.

关键词： Multiaccess communication Streaming media Scheduling algorithm Downlink Quality of service Delay Bit rate Protection multimedia systems Algorithm design and analysis

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APCC/MDMC '04. The 2004 Joint conference of the 10th Asia-Pacific conference on Communications and the 5th International Symposium on Multi-Dimensional Mobile Communications Proceeding

APCC/MDMC '04. The 2004 Joint Conference of the 10th Asia-Pa...

引用

Asia-Pacific conference on Communications

The following topics are dealt with: TDD-WCDMA MAC protocol; software defined radio; interference suppression; wireless LAN; MIMO systems; MIMO-OFDM communication; space-time modulation; orthogonal code hopping multiplexing; wireless mesh networks; multicast communication; IP networks; session initiated protocol; mobile multimedia MAN; VBLAST systems; smart antenna system; UWB system; satellite ATM; terrestrial networks; phase shift keying; source routing; content delivery server; parallel downloading; heterogeneous networks; fast fading channels; antenna arrays; spatial multiplexing system; audio coding; space-time multiuser detection scheme; blind channel estimation; photonic burst networks; optical transmission system; pervasive computing; DS-CDMA system; GSM system; packet switched networks; differentiated services network; WDM systems; wireless terminals; microstrip filters; QoS architecture; adaptive priority queuing; VoIP networks; watermark detection scheme; dipole array; image sequences; video streaming service; GPRS network; wireless ad hoc network; electromagnetic wave propagation; slab waveguides; mismatched filtering; MPLS network; conformance testing; space-time codes; mobile IP network management; and ad hoc routing protocol.

关键词： Time division multiplexing Code division multiaccess access protocols Interference suppression Wireless LAN MIMO systems Metropolitan area networks multimedia communication Adaptive arrays Satellite communication Phase shift keying Audio coding Spread spectrum communication Land mobile radio cellular systems Wavelength division multiplexing Microstrip filters Image sequence analysis Electromagnetic propagation Waveguides Communication system operations and management

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Development of a MPPT method for photovoltaic systems

Development of a MPPT method for photovoltaic systems

引用

Canadian conference on Electrical and Computer Engineering (CCECE)

作者： T. Tafticht K. Agbossou Institut de Recherche sur I'Hydrogène Universita de Québec à Trois-Rivières Trois-Rivieres QUE Canada

In the algorithms found in the literature for finding the optimum point of operation MPPT ( maximum power point tracking), of photovoltaic (PV) modules, the initial reference value is fixed arbitrarily and without constraints. This reduces the performance of research into the optimal operation point of PV systems. In order to improve this performance, a MPPT method based on a nonlinear approach is proposed for estimation of the initial value of the reference. The combination of this approach with the perturbation and observation (P and O) method has enabled progress to be made in the search for the optimal operation point of the PV system.

关键词： Buck converters content addressable storage Pulse width modulation Diodes MOSFET circuits Radio access networks Temperature Meteorology

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