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

共 2024 条记录，以下是1411-1420 订阅

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A data mining framework for building a Web-page recommender system

A data mining framework for building a Web-page recommender ...

引用

Proceedings of the 2004 IEEE International conference on Information Reuse and Integration, IRI-2004

作者： Haruechaiyasak, Choochart Shyu, Mei-Ling Chen, Shu-Ching Info. R. and D. Division Natl. Electron./Comp. Technol. Ctr. Thailand Science Park Klong Luang Pathumthani 12120 Thailand Dept. of Elec. and Comp. Engineering University of Miami Coral Gables FL 33124 United States Distributed Multimedia Info. S.L. School of Computer Science Florida International University Miami FL 33199 United States

ISBN: (纸本)0780388194

In this paper, we propose a new framework based on data mining algorithms for building a Web-page recommender system. A recommender system is an intermediary program (or an agent) with a user interface that automatically and intelligently generates a list of information which suits an individual's needs. Two information filtering methods for providing the recommended information are considered: (1) by analyzing the information content, i.e., content-based filtering, and (2) by referencing other user access behaviors, i.e., collaborative filtering. By using the data mining algorithms, the information filtering processes can be performed prior to the actual recommending process. As a result, the system response time could be improved and thus, making the framework scalable. © 2004 IEEE.

关键词： Data mining

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Implementation of a wireless streaming system for universal multimedia access

Implementation of a wireless streaming system for universal ...

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Proceedings of the IEEE 12th Signal Processing and Communications Applications conference, SIU 2004

作者： Ünal, Ünsem Akar, Gözde Bozdaǧi Orta Doǧu Teknik Üniv. Elektrik ve Elektronik Mühendisliǧi Bölümü Ankara

ISBN: (纸本)0780383184

This document, describes a universal multimedia access system and its implementation details. In the context of this document, universal multimedia access means accessing multimedia content over ubiquitous computer networks, using different computing platforms. The computer networks involve both wired and wireless networks, and computing platforms involve wired PC's, mobile PC's and personal digital assistants (PDA). The system is built on client/server architecture. Video data is H.263 coded and carried over RTP. Java Media Framework is utilized and its capabilities are extended with special plug-ins when necessary. ©2004 IEEE.

关键词： multimedia systems

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Integrating ontology knowledge into a query algebra for multimedia meta objects

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5th International conference on Web Information systems Engineering (WISE 2004)

作者： Zillner, S Winiwarter, W Univ Vienna Dept Comp Sci & Business Informat A-1010 Vienna Austria

ISBN: (纸本)3540238948

Efficient access to multimedia content can be provided, if the media data is enriched with additional information about the content's semantics and functionality. For making full use of domain-specific knowledge for a specific context this meta information has to be integrated with a domain ontology. In previous research. we have developed Enhanced multimedia Meta Objects (EMMOs) as a new means for semantic multimedia meta modeling, as well as a query algebra EMMA, which is adequate and complete with regard to the EMMO model. This paper focuses on the seamless integration of ontology knowledge into EMMA queries to enable sophisticated query refinement.

关键词： Ontology

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Automatic methods for content -based access and summarization of video sequences

Automatic methods for content -based access and summarizatio...

引用

作者： Taskiran, Cuneyt Murat Purdue University

学位级别：Ph.D.

Depending on the specific information they are seeking, users desire flexible and intuitive methods to search and browse multimedia libraries. However, the cost of manually extracting the metadata to support such functionalities may be unrealistically high. Therefore, over the last decade there has been a great interest in designing and building systems that automatically analyze and index multimedia data, and retrieve its relevant parts. In this work we describe algorithms that facilitate browsing, searching, and summarization of video sequences. We propose shot transition detection algorithms for the detection of cut and dissolve types of shot transitions based on a binary tree regression classifiers framework. Our system is able to detect these transitions with high accuracy. We discuss stochastic models to model video program genres, such as news programs or sitcoms, and show how these can be applied to automatically detect the genre of a given program. We investigate the use of hidden Markov Models (HMMs) and stochastic context-free grammars (SCFGs) for modeling. Since the computational complexity of SCFG training is high, we develop a hybrid HMM-SCFG model that reduces the training time of the models considerably. Deriving compact representations of video sequences that are intuitive for users and let them easily and quickly browse large collections of video data is fast becoming one of the most important topics in content-based video processing. Such representations, which we will collectively refer to as video summaries, rapidly provide the user with information about the content of the particular sequence being examined, while preserving the essential message. We propose an automated method to generate video skims for information-rich video programs, such as documentaries, educational videos, and presentations, using statistical analysis based on speech transcripts that are obtained by automatic speech recognition (ASR) from the audio. Ideally one would lik

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content transcoding middleware for pervasive geospatial intelligence access

Content transcoding middleware for pervasive geospatial inte...

引用

2004 IEEE International conference on multimedia and Expo (ICME)

作者： Lin, Ching-Yung Natsev, Apostol Tseng, Belle L. Hill, Matthew Smith, John R. Li, Chung-Sheng IBM T.J. Watson Research Center 19 Skyline Drive Hawthorne NY 10532

ISBN: (纸本)0780386035

In this paper, we describe a novel content transcoding middleware for accessing military geospatiall intelligence information in real-time. Intelligence information, including maps and location, category and properties of object targets, is adapted for various pervasive devices such as laptop, personal digital assistance (PDA), cellular phone, etc. The middleware is deployed as proxies on the Web using the IBM Websphere Transcoding Publisher (WTP) platform, which facilitates the middleware management. We developed several Java-based plug-ins and Extensible Stylesheet Language (XSL) stylesheets for content transcoding. A prototype has been established and real experiments have demonstrated the effectiveness of this novel middleware.

关键词： Real time systems

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Fully scalable video coding in multicast applications

Fully scalable video coding in multicast applications

引用

conference on Visual Communications and Image Processing 2004

作者： Lerouge, S De Sutter, R Lambert, P Van de Walle, R Univ Ghent Dept Elect & Informat Syst Multimedia Lab Ghent Belgium

ISBN: (纸本)0819452114

The increasing diversity of the characteristics of the terminals and networks that are used to access multimedia content through the internet introduces new challenges for the distribution of multimedia data. Scalable video coding will be one of the elementary solutions in this domain. This type of coding allows to adapt an encoded video sequence to the limitations of the network or the receiving device by means of very basic operations. algorithms for creating fully scalable video streams, in which multiple types of scalability are offered at the same time, are becoming mature. On the other hand, research on applications that use such bitstreams is only recently emerging. In this paper, we introduce a mathematical model for describing such bitstreams. In addition, we show how we can model applications that use scalable bitstreams by means of definitions that are built on top of this model. In particular, we chose to describe a multicast protocol that is targeted at scalable bitstreams. This way, we will demonstrate that it is possible to define an abstract model for scalable bitstreams, that can be used as a tool for reasoning about such bitstreams and related applications.

关键词： multimedia scalable video coding model scalable bitstreams multicast

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Feature-based watermarking for digital right management in content distribution

Feature-based watermarking for digital right management in c...

引用

conference on Internet multimedia Management systems V

作者： Zhou, WS Xie, H Sagetong, P HRL Labs LLC Informat Sci Lab Malibu CA 90265 USA

ISBN: (纸本)0819455547

More and more digital services provide capability of distributing digital content to end-users through high-band networks;such as satellite systems.' In such systems, Digital Right Management has become more and more important and is encountering great challenges. Digital watermarking is proposed as a possible solution for the digital copyright tracking and enforcement. The nature of DRM systems puts high requirements on the watermark's robustness, uniqueness, easy detection, accurate retrieval and convenient management. We have developed a series of feature-based watermarking algorithms for digital video for satellite transmission.(1-3) In this paper, we will first describe a general secure digital content distribution system model and the requirements of watermark as one mechanism of DRM in digital content distribution applications. Then we will present a few feature-based digital watermarking methods in detail which are integrated with a dynamic watermarking schema to protect the digital content in a dynamic environment. For example, a watermark which is embedded in the DFT feature domain is invariant to rotation, scale and translation. Our proposed DFT domain watermarking schemas in which exploit the magnitude property of the DFT feature domain will allow both robust and easy watermark tracking and detection in the case of copyright infringement using cameras or camcorders. This DFT feature-based watermarking algorithm is able to tolerate large angle rotation and there is no need to search for possible rotated angles, which reduces the complexity of the watermark detection process and allows fast retrieval and easy management. We will then present a wavelet feature-based watermark algorithm for dynamic watermark key updates and key management, and we will conclude the paper with the summary, pointing our future research directions.

关键词： watermark feature-based watermarking digital right management content distribution

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Leafing digital content

Leafing digital content

引用

IUI 04: 2004 International conference on Intelligent User Interfaces

作者： Barletta, A. Mayer, M. Moser, B. GmbH Sony Corporate Laboratory Europe Hedelfinger Strasse 61 Stuttgart D-70327 Germany

Today the availability of large digital content archives (video, ebook, audio) creates many problems in terms of user interaction and data manipulation (browsing, searching). Many approaches have been introduced in the past for quickly browsing a digital video library. In this paper we introduce a general framework for representing multimedia contents with a more effective, user-driven, speed-dependent browsing process by using a different user interaction metaphor: the manual/mental process of "leafing through the pages of an illustrated magazine". "Digital Leafing" is a combination of user interactions and speed-dependent data representation of digital contents. In case of video, we conclude that such a solution provides a more neutral and personal browsing and it trades off the complexity of video extraction algorithms with a higher user control.

关键词： multimedia systems

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EMMA - A query algebra for enhanced multimedia meta objects

引用

On the Move Confederated International Workshop and conference

作者： Zillner, S Westermann, U Winiwarter, W Univ Vienna Dept Comp Sci & Business Informat Vienna Austria

ISBN: (纸本)3540236627

Enhanced multimedia Meta Objects (EMMOs) are a novel approach to multimedia content modeling, combining media, semantic relationships between those media, as well as functionality on the media, such as rendering, into tradeable knowledge-enriched units of multimedia content. For the processing of EMMOs and the knowledge they contain, suitable querying facilities are required. In this paper, we present EMMA, an expressive query algebra that is adequate and complete with regard to the EMMO model. EMMA offers a rich set of formally-defined, orthogonal query operators that give access to all aspects of EMMOs, enable query optimization, and allow the representation of elementary ontology knowledge within queries. Thereby, EMMA provides a sound and adequate foundation for the realization of powerful EMMO querying facilities.

关键词： Algebra

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Encryption and authentication for scalable multimedia: Current state of the art and challenges

Encryption and authentication for scalable multimedia: Curre...

引用

conference on Internet multimedia Management systems V

作者： Zhu, BB Swanson, MD Li, SP Microsoft Res Asia Beijing 100080 Peoples R China

ISBN: (纸本)0819455547

Scalable coding is a technology that encodes a multimedia signal in a scalable manner where various representations can be extracted from a single codestream to fit a wide range of applications. Many new scalable coders such as JPEG 2000 and MPEG-4 FGS offer fine granularity scalability to provide near continuous optimal tradeoff between quality and rates in a large range. This fine granularity scalability poses great new challenges to the design of encryption and authentication systems for scalable media in Digital Rights Management (DRM) and other applications. It may be desirable or even mandatory to maintain a certain level of scalability in the encrypted or signed codestream so that no decryption or re-signing is needed when legitimate adaptations are applied. In other words, the encryption and authentication should be scalable, i.e., adaptation friendly. Otherwise secrets have to be shared with every intermediate stage along the content delivery system which performs adaptation manipulations. Sharing secrets with many patties would jeopardize the overall security of a system since the security depends on the weakest component of the system. hi this paper, we first describe general requirements and desirable features for an encryption or authentication system for scalable media, esp. those not encountered with the non-scalable case. Then we present an overview of the current state of the art of technologies in scalable encryption and authentication. These technologies include full and selective encryption schemes that maintain the original or coarser granularity of scalability offered by an unencrypted scalable codestream, layered access control and block level authentication that reduce the fine granularity of scalability to a block level, among others. Finally, we summarize existing challenges and propose future research directions.

关键词： multimedia encryption multimedia authentication selective encryption scalable encryption scalable authentication security digital rights management DRM layered access control JPEG 2000 MPEG-4 FGS fine granularity scalability

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