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

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A micro-component architecture approach for next generation embedded browsers

A micro-component architecture approach for next generation ...

引用

2nd International conference on Embedded Software and systems

作者： Yamakami, T ACCESS Div Res & Dev Chiyoda Ku Tokyo Japan

ISBN: (纸本)0769525121

The mobile Internet adds the new multi-media features and takes a convergence to the wired Internet. The emerging diversity of the content languages adds a new challenge as well as the sustained challenge from the diversity of the execution environments. The author describes the mobile Internet evolution from the browser viewpoint in the three-stage model. After describing the focus shift during this evolution, the author discusses the architecture need to leverage the combination of the multimedia processing components in multiple applications in a resource-constraint environment. This leads to the new architecture demand to cope with the diversity of the content languages as well as the resource restrictions in the embedded client environment. The author proposes a micro-component architecture to enable browsers to act as a toolkit to construct a wide range of application clients on a mobile handset with optimal footprint. A case study in SVG case is shown to evaluate the effect of the proposed micro-component architecture approach.

关键词： Computer architecture

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Challenges in media delivery systems and servers

Challenges in media delivery systems and servers

引用

conference on Image and Video Communications and Processing 2005

作者： Swaminathan, V Sun Microsyst Inc Mountain View CA 94043 USA

ISBN: (纸本)0819456586

Although multimedia compression for-mats and protocols to stream such content have been around for a long time, there has been limited success in the adoption of open standards for streaming over IP (Internet Protocol) networks. The elements of such an end-to-end system will be introduced outlining the responsibilities of each element. The technical and financial challenges in building a viable multimedia streaming end-to-end system will be analyzed in detail in this paper outlining some solutions and areas for further research. Also, recent migration to IP in the backend video delivery network infrastructures have made it possible to use IP based media streaming solutions in non-IP last mile access networks like cable and wireless networks in addition to the DSL networks. The advantages of using IP streaming solutions in such networks will be outlined. However, there is a different set of challenges posed by such applications. The real time constraints are acute in each element of the media delivery end-to-end system. Meeting these real time constraints in general purpose non real time server systems is quite demanding. Quality of service, resource management, session management, fail-over, reliability, and cost are some important but challenging requirements in such systems. These will also be analyzed with suggested solutions. content protection and rights management requirements are also very challenging for open standards based multimedia delivery systems. Interoperability unfortunately interferes with security in most of the current day systems. Some approaches to solve the interoperability problems will also be presented. The requirements, challenges, and possible solutions for delivering broadcast, on demand, and interactive video delivery applications for IP based media streaming systems will be analyzed in detail.

关键词： video streaming multimedia streaming streaming servers media delivery systems IP streaming

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Picturefinder: Description logics for semantic image retrieval

Picturefinder: Description logics for semantic image retriev...

引用

IEEE International conference on multimedia and Expo, ICME 2005

作者： Schober, Jean-Pierre Hermes, Thorsten Herzog, Otthein Center for Computing Technologies University of Bremen Germany

ISBN: (纸本)0780393325

Large amount of images need an efficient way of retrieving them. The usual approach of manually annotating images and/or providing a syntactic retrieval capability lacks flexibility and comfort. The automatic annotation of images is a main target of the image retrieval community. These so called content-based image retrieval (CBIR) systems focus on primitive features, as Eakins and Graham [1] name them. Description logics (DL) offer a useful contribution to content-based image retrieval while allowing logical reasoning about the semantic contents of the image and ending with consistent classification results. This is a main advantage about traditional classification algorithms. Another advantage is the possibility to use domain knowledge, which is formulated in DL, on the retrieval side, thus offering a semantic retrieval. In this paper we present an approach and the results of adopting a DL for classifying image regions. ©2005 IEEE.

关键词： content based retrieval

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Quality of service and proactive content replication in UPnP based A/V environments

Quality of service and proactive content replication in UPnP...

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IASTED International conference on Parallel and Distributed Computing and Networks, as part of the 23rd IASTED International Multi-conference on Applied Informatics

作者： Ditze, Michael Loeser, Chris Bohn, Hendrik Bobek, Andreas Golatowski, Frank Fürstenallee 11 33102 Paderborn Germany Institute of Applied Microelectronics and Computer Science University of Rostock Richard-Wagner-Strasse 32 18119 Rostock-Warnemuende Germany

multimedia Applications e.g. Video/Audio streaming increasingly strive for deployment in distributed and domain spanning networking environments. In order to ensure the service interoperability between content servers and rendering devices across heterogeneous platforms, distributed middleware approaches offer promising concepts (e.g. Service Oriented Architectures). The UPnP forum has developed a platform-neutral architectural framework that specifies a set of well defined service discovery and access routines concealed behind a unified set of protocols and their APIs. While UPnP supports service interoperability additional service extensions are required to satisfy requirements as imposed by many multimedia applications. These requirements cover QoS support from the application source to the sink which entails the encapsulation of signalling services that allow for resource reservation on network and end-devices. Furthermore we introduce a proactive content replication paradigm: According to popularity forecasts it is possible to create replicas of e.g. movie content to avoid hot-spots maintaining very popular content in large scale networks. The contribution of this paper is to identify domain spanning distributed multimedia scenarios and describe the challenges for developing enhancing services to the UPnP framework that help to establish them.

关键词： multimedia systems

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User preference learning for multimedia personalization in pervasive computing environment

User preference learning for multimedia personalization in p...

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9th International conference on Knowledge-Based Intelligent Information and Engineering systems

作者： Yu, ZW Zhang, DQ Zhou, XS Li, CD Northwestern Polytech Univ Sch Comp Sci Xian Peoples R China Inst Infocomm Res Context Aware Syst Dept Singapore Singapore

ISBN: (纸本)3540288953

Pervasive computing environment and users' demand for multimedia personalization precipitate a need for personalization tools to help people access desired multimedia content at anytime, anywhere, through any devices. User preference learning plays an important role in multimedia personalization. In this paper, we propose a learning approach to acquire and update user preference for multimedia personalization in pervasive computing environment, The approach is based on Master-Slave architecture, of which master device is a device with strong capabilities, such as PC, TV with STB (set-on-box) or PDR (Personal Digital Recorder), etc, and slave devices are pervasive terminals with limited resources. The preference learning and update is done in the master device by utilizing overall user feedback information collected from different devices as opposed to other traditional learning methods that just use partial feedback information in one device. The slave devices are responsible for observing user behavior and uploading feedback information to the master device. The master device is designed to support multiple learning methods: explicit input/modification and implicit learning. The implicit user preference learning algorithm, which applies relevance feedback and Naive Bayes classifier approach, is described in detail.

关键词： Learning systems

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Maximizing the profit for cache replacement in a transcoding proxy

Maximizing the profit for cache replacement in a transcoding...

引用

IEEE International conference on multimedia and Expo, ICME 2005

作者： Hung, Hao-Ping Chen, Ming-Syan Graduate Institute of Communication Engineering National Taiwan University

ISBN: (纸本)0780393325

Recent technology advances in multimedia communication have ushered in a new era of personal communication. Users can ubiquitously access the Internet via various mobile devices. For the moible devices featured with lower-bandwidth network connectivity, transcoding can be used to reduce the object size by lowering the quality of a mutimedia object. In this paper, we focus on the cache replacement policy in a transcoding proxy, which is a proxy server responsible for transcoding the object and reducing the network traffic. Based on the architecture in prior works, we propose a Maximum Profit Replacement algorithm, abbreviated as MPR. MPR performs cache replacement according to the content in the caching candidate set, which is generated by the concept of dynamic programming. Experimental results show that the the proposed MPR outperforms the prior scheme in terms of the cache hit ratio. © 2005 IEEE.

关键词： multimedia systems

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Forward link performance analysis of a deployed CDMA2000 network

Forward link performance analysis of a deployed CDMA2000 net...

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12th IEEE International conference on Electronics, Circuits and systems, ICECS 2005

作者： Issa, Omneya Kara, Nadjia Courtemanche, Marc International Institute of Telecommunications Montréal QC Canada

ISBN: (纸本)9789972611001

The deployment of third generation (3G) technologies is constantly growing, offering higher wireless capacity which promises broader access to IP applications including rich multimedia content. The deployment of such applications primarily requires the identification of performance characteristics offered by the underlying 3G network. In this paper, the results of a series of experiments aiming to characterize the performance of forward link 3G CDMA2000 1x-RTT wireless networks are presented. The performance is evaluated for various types of traffic, e.g. FTP, HTTP, VoIP and multimedia streaming. The measurements have been performed on a live CDMA2000 1x-RTT network for both stationary and mobile states, providing results not readily obtainable by means of simulations. The paper highlights issues that researchers should consider when validating their design on this type of network. Moreover, a set of recommendations are provided giving a road map for operators and service developers providing applications running on such networks.

关键词： Code division multiple access

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Sharing web-based multimedia learning objects using NNTP news architecture

Sharing web-based multimedia learning objects using NNTP new...

引用

5th IEEE International conference on Advanced Learning Technologies, ICALT 2005

作者： Chang, Liang-Kao Liu, Kuo-Yu Wu, Chien-An Chen, Herng-Yow Department of Computer Science and Information Engineering National Chi-Nan University 1st University Rd. Pu-Li Nan-Tou County 545 Taiwan

ISBN: (纸本)0769523382

This paper presents a multimedia objects sharing framework on the basis of Internet News infrastructure (NNTP) to facilitate e-learning content access and distribution. Through this framework, a web-based e-learning system can publish sharable learning objects by posting them to a news server nearby, so that the objects can be automatically spread to world-wide news servers through NNTP forwarding mechanism. Instead of hunting for the desired materials from many different e-learning systems, users can access learning objects shared from different e-learning platforms easily, and in a unified way. Moreover, we deal with severe data redundancy problem occurring especially when the shared object contains multimedia data (e.g., instructor's speech, image, and video). A system prototype has been implemented in our university to share English lectures with others. © 2005 IEEE.

关键词： Learning systems

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LLV1 - Layered lossless video format supporting multimedia servers during realtime delivery

LLV1 - Layered lossless video format supporting multimedia s...

引用

multimedia systems and Applications VIII

作者： Militzer, Michael Suchomski, Maciej Meyer-Wegener, Klaus Friedrich-Alexander University of Erlangen-Nuremberg Martensstr. 3 91058 Erlangen Germany

ISBN: (纸本)0819460397

For multimedia servers, data independence is as beneficial as it is for databases. It means that users access the data without referring to the storage format, and the server returns them in many different formats and qualities. The storage format can then be chosen at will, and it should be selected to support a large variety of accesses. When looking at video, some of the accesses even require real-time processing. LLV1 is a layered video format for storing videos without loss of information. Its layers can be read separately, so that scalability is achieved in terms of bandwidth and computational resources. LLV1 has been developed on the basis of XviD, a state-of-the-art implementation of the MPEG-4 Part 2 standard, and is designed for use in multimedia servers to facilitate real-time format conversions, a requirement to reach data-independent access to media objects. Thus, XviD's advantages in efficient video compression are inherited by LLV1. Orthogonality of the layering is provided by the different enhancement layers in respect to temporal resolution and spatial properties. The compression efficiency is comparable to other lossless formats, however only LLV1 provides scalability features, which can be exploited in real-time processing. Moreover, the scalable design of the decompression algorithm allows for adaptable execution and thus makes QoS control possible. Additionally, the coding algorithm is asymmetric, which further reduces the computational requirements for delivering the multimedia content from storage to the end user.

关键词： Real time systems

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JPEG2000 and motion JPEG2000 content analysis using codestream length information

JPEG2000 and motion JPEG2000 content analysis using codestre...

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DCC 2005: Data Compression conference

作者： Tabesh, Ali Bilgin, Ali Krishnan, Karthik Marcellin, Michael W. Department of Electrical and Computer Engineering University of Arizona Tucson AZ 85721-0104

The widespread adoption of the JPEG2000 standard calls for the development of computationally efficient algorithms to analyze the content of imagery compressed using this standard. For this purpose, we propose the use of the information content (IC) of wavelet subbands, defined as the number of bytes that JPEG2000 spends to encode the subbands. The IC of subbands can be obtained from the packet headers of the JPEG2000 codestream, thereby avoiding decompressing the arithmetically encoded bitplane data. We present experimental results for two content analysis tasks;namely, image classification and scene change detection. Our results indicate that performance comparable to that of methods operating on decompressed data can be achieved, while saving computational and bandwidth resources. © 2005 IEEE.

关键词： multimedia systems

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