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International conference on Distributed Computing systems Workshop

作者： Markus Dunte Christoph Ruland Institute for Data Communications Systems University of Siegen Siegen Germany

The fast growing progress in data communication leads to a wide variety of available access technologies that provide everything from mobile data transfer to high-speed data links using fibre optics. Due to this fact multimedia contents, which have to be transmitted, have to be adapted every time the connection parameters are changing. Fortunately, modern video coding standards are able to deliver one multimedia signal in a scalable manner where various representations can be extracted to fit a wide range of applications. Commonly known standards such as MPEG-4 and H.264 are designed to provide a nearly perfect trade-off between quality and data rates. The other side of the coin is that none of these modern video-coding algorithms is implementing any security features that will prevent unauthorised access. Therefore, this paper will first briefly examine modern coding algorithms and techniques. Having finished analysis, a communication infrastructure set-up for improved multimedia delivery will be presented along with a cryptographic concept that prevents unauthorised access and perfectly fits into the system. Finally, a conclusion will be given.

关键词： Delay Encoding Algorithm design and analysis Games Bandwidth Optimized production technology Cryptography

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Integration of WiMAX access Management and Control in a Multi-domain System for multimedia Distribution

Integration of WiMAX Access Management and Control in a Mult...

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International conference on systems and Networks Communications (ICSNC)

作者： Eugen Borcoci Radu Lupu Serban Obreja Universitat Politecnica de Catalunya Bucharest Romania

This paper further refines the architecture and design, introduced in a previous work on the management and control, of the IEEE 802.16/WiMAX access in a multi-domain chain of IP core networks. The high level objective is to manage end-to-end connectivity services in an integrated way, at overlay level, assuring guaranteed QoS for multimedia delivery over networks with heterogeneous access. Flexible solutions are proposed for integration of the WiMAX service flows management and control within an integrated management system (EIMS) developed in the ENTHRONE FP6 project.

关键词： WiMAX Control systems multimedia systems Quality of service Resource management Project management Carbon capture and storage conference management Communication system control content management

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Exploiting Semantics for Personalized Story Creation

Exploiting Semantics for Personalized Story Creation

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International conference on Semantic Computing

作者： Mark D. Wood Eastman Kodak (Japan) Limited USA

ISBN: (纸本)9781424432035

The task of creating albums or multimedia output from consumer content is becoming increasingly difficult as the amount of content grows. This work presents a system for using semantic information to automate the process of selecting and combining digital assets into summary presentations or storylines, as well as determining triggers for when to generate such content. The system obtains semantic information from a variety of sources, including the capture metadata, image and video understanding algorithms, user profiles and third party ontologies; all such semantic information is stored in a triple store. Prolog-based rules leverage the triple store to provide a knowledgebase for determining when to create particular types of output and how to select assets for such output. This knowledgebase greatly simplifies the task of creating consumer-grade multimedia content.

关键词： Ontologies multimedia communication Classification algorithms multimedia systems Engines Catalogs Cameras

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multimedia terminal architecture: An inter-operable approach

Multimedia terminal architecture: An inter-operable approach

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ACS/IEEE International conference on Computer systems and Applications

作者： Beilu Shao Marco Mattavelli Maria T. Andrade Samuel Keller Giorgiana Ciobanu Pedro Carvalho Swiss Federal Institute of Technology Switzerland INESC-Porto Portugal

This paper addresses the inter-operability problem of multimedia terminal in media content delivery over heterogeneous networks and devices. We design and implement a terminal which includes a content browser providing presentation, navigation and interaction with MPEG-21 digital item declaration (MPEG-21 DID) in order to support universal media access (UMA). We optimized the architecture in a client-server distributed approach with Web Service support. This terminal enables the MPEG-21 standard compliant content accessible on different terminal devices via common Web browsers. Such a design strategy illustrates a next-generation multimedia terminal supporting inter-operability in multimedia content adaptation over a heterogeneous delivery chain.

关键词： Web services Service oriented architecture Data models Decoding Middleware Nonhomogeneous media Navigation Next generation networking IP networks Availability

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Mining Web access Log for the Personalization Recommendation

Mining Web Access Log for the Personalization Recommendation

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International conference on multimedia and Information Technology, MMIT

作者： Xueping Peng Yujuan Cao Zhendong Niu The School of Computer Science and Technology Beijing Institute of Technology Beijing China The Information School University of Pittsburgh PA USA

This paper presents a personalization recommendation model to recommend potentially interesting resources to users based on the Web access log of users. This model builds on the apriori algorithm and the tf-idf technology, which consists of three parts: resource description, user's preference extraction and the personalization recommendation. Firstly, our model generates resource text space vector by analyzing the resource information achieved by mining user's Web access log, then it attains interest set to make use of the apriori algorithm based on the vector, finally, it recommends filtered and sorted resources to users content based recommendation model.

关键词： Itemsets Transaction databases Information filtering Information filters Association rules Paper technology Space technology Data mining Filtering algorithms Information technology

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Constructing Visual Phrases for Effective and Efficient Object-Based Image Retrieval

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ACM TRANSACTIONS ON multimedia COMPUTING COMMUNICATIONS AND APPLICATIONS 2008年第1期5卷 1–19页

作者： Zheng, Qing-Fang Gao, Wen Chinese Acad Sci Inst Comp Technol Beijing 100080 Peoples R China

The explosion of multimedia data necessitates effective and efficient ways for us to get access to our desired ones. In this article, we draw an analogy between image retrieval and text retrieval and propose a visual phrase-based approach to retrieve images containing desired objects (object-based image retrieval). The visual phrase is defined as a pair of frequently co-occurred adjacent local image patches and is constructed using data mining. We design methods on how to construct visual phrase and how to index/search images based on visual phrase. We demonstrate experiments to show our visual phrase-based approach can be very efficient and more effective than current visual word-based approach.

关键词： algorithms Experimentation Performance content-based image retrieval inverted index local image descriptor SIFT object-based image retrieval visual phrase

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Secure and Fast multimedia Digital content Distribution System Based on a Partial Encryption and Group-Key

Secure and Fast Multimedia Digital Content Distribution Syst...

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International conference on Convergence Information Technology

作者： Olga Yugay Beomjune Kim Hui-seong Na Franz I. S. Ko Department of Computer Science Dongguk University Gwangju Gyeongsang South Korea

Security and fast multimedia distribution has become an important research topic due to ever growing opportunities on the Internet and improving network capability. Faster and more secure multimedia distribution can be achieved through Web caching and encryption. Due to specific characteristic of multimedia content such as its size, it is important to reconsider encryption technique used for multimedia content. In order to reduce user perceived latency, it is proposed to use partial encryption based on the multimedia type. Moreover, in order to guarantee that only authorized users have access to secure multimedia, group key management is introduced into the proposed system. This enables to ensure backward and forward secrecy on authorized group. Using these techniques will guarantee a more secure and faster multimedia content distribution.

关键词： multimedia systems Cryptography Data security Delay Public key Certification Safety Bandwidth Web services Information technology

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MPEG-7 Enhanced Ubi-multimedia access——Convergence of User Experience and Technology

MPEG-7 Enhanced Ubi-Multimedia Access——Convergence of User...

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2008 the First IEEE International conference on Ubi-Media Computing and Workshops(U-Media2008)

作者： Yong Rui Microsoft Research One Microsoft Way Redmond, WA 98052, USA

Unlike early versions of MPEG, MPEG-7 is shifting from a data-compression standard to a multimedia content description standard. As a result, it will have much broader implications for the human-computer interaction research. There are countless ways that the MPEG-7 meta- data description framework can enhance users’ experiences in accessing multimedia content. In this paper, we will report the algorithms that we developed for automatic generation of MPEG-7’s description schemes (DSs): a video Table of contents DS to enhance active video browsing, a Summary DS to enable direct use of a meta-data producer’s annotation, and a Still Image DS to allow interactive content-based image retrieval. Experimental results and user studies demonstrated the usefulness of MPEG-7’s meta-data framework and effectiveness of our proposed automatic DS generation techniques.

关键词： MPEG-7 Enhanced Ubi-multimedia access Convergence of User Experience and Technology

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Physical-virtual linkage with contextual bookmarks 08

Physical-virtual linkage with contextual bookmarks

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10th International conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2008

作者： Henze, Niels Rukzio, Enrico Lorenz, Andreas Righetti, Xavier Boll, Susanne OFFIS Institute for Information Technology Oldenburg Germany Computing Department Lancaster University United Kingdom Fraunhofer-Institute for Applied Information Technology FIT Germany VRlab. EPFL Switzerland Media Informatics and Multimedia Systems University of Oldenburg Germany

ISBN: (纸本)9781595939524

In our everyday life we often see objects or persons and are aware that there are related digital services such as an online ticket service when seeing a poster advertising a concert. Currently it is a rather time consuming activity to find the related information. Using our Contextual Bookmark system a user can define a snapshot with her mobile phone consisting of a picture, time stamp and location. Such a bookmark can then be stored on the mobile phone, exchanged with friends and in particular be used to access related videos, web pages, and other services. This helps the user to bridge the gap between the virtual and the real world in order to use related services. Combining content and context analysis objects are recognized without any visual markers or electronic tags. We would like to demonstrate our system based on a nomadic usage scenario in which a person defines a Contextual Bookmark of a movie trailer, buys the corresponding movie, plays the movie on a TV, and exchanges the bookmark with a friend. © 2008 ACM.

关键词： Cellular telephones

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Real-time video recording on Blu-ray discs for UPnP streaming

Real-time video recording on Blu-ray discs for UPnP streamin...

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International conference on Communications and Networking in China (CHINACOM)

作者： Chun-Yi Tsai Tzao-Lin Lee Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan

UPnP is a novel networking and content sharing standard for digital home applications with its main feature, automatic discovery technique, allowing client users to fast deploy and easily access multimedia resources shared by UPnP media servers. As the high quality of multimedia content becomes more delicate today, the file size is becoming gigantic resulting from its high bit rate with complex encoding format. So the high-capacity optical storage media will undoubtedly play an important role to store quantities of huge content today. This paper proposes a real-time recording scheme to record real-time video stream on Blu-ray discs under UPnP systems to satisfy the emerging storing demand for high quality media streaming content.

关键词： Video recording Streaming media multimedia systems Optical recording Real time systems File servers Network servers Bit rate Encoding Disk recording

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