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

共 204 条记录，以下是181-190 订阅

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Managing large scale broadband multimedia services on distributed media servers

Managing large scale broadband multimedia services on distri...

引用

IEEE International Conference on multimedia Computing and systems (ICMCS)

作者： R. Luling Department of Mathematics and Computer Science University of Paderborn Germany

The paper presents algorithms and principles for the management of large scale broadband multimedia services. For the implementation of these services, we use a network of distributed media servers, storing broadband media information e.g. audio and video that are streamed from the server to the connected clients. The problem studied in the paper is the managing of media content on a server network. We present the "Distributed Server Management System (DSMS)" that performs an efficient content and service management on the distributed servers. The DSMS allows one to collect access patterns from the users of the multimedia services and uses this knowledge for the solution of some combinatorial optimization algorithms that have to be solved for an efficient assignment of media assets. We present these optimization algorithms and evaluate their performance using some benchmark instances.

关键词： Large-scale systems Network servers Streaming media content management Spine Bandwidth Bit rate Mathematics Computer science Large scale integration

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An adaptive view element framework for multi-dimensional data management 99

An adaptive view element framework for multi-dimensional dat...

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8th International Conference on Information Knowledge Management (CIKM 99)

作者： Smith, JR Li, CS IBM TJ Watson Res Ctr Data Management Hawthorne NY 10532 USA

ISBN: (纸本)1581131461

We present an adaptive wavelet view element framework for managing different types of multi-dimensional data in storage and retrieval applications. We consider the problems of multi-dimensional data compression, multi-resolution sub-region access, selective materialization, progressive retrieval and similarity searching. The framework uses wavelets to partition the multi-dimensional data into view elements that form the building blocks for synthesizing views of the data. The view elements are organized and managed using different view element graphs. The graphs are used to guide cost-based view element selection algorithms for optimizing compression, access, retrieval and search performance. We present the adoptive wavelet view element framework and describe its application in managing multi-dimensional data such as 1-D time series data, 2-D images, video sequences, and multi-dimensional data cubes. We present experimental results that demonstrate that the adaptive wavelet view element framework improves performance of compressing, accessing, and retrieving multi-dimensional data compared to non-adaptive methods.

关键词： multimedia database systems data management OLAP data cubes content-based search digital libraries and information retrieval

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Static and dynamic mapping of media assets on a network of distributed multimedia information servers

Static and dynamic mapping of media assets on a network of d...

引用

International Conference on Distributed Computing systems

作者： R. Luling Department of Mathematics and Computer Science University of Paderborn Germany

This paper presents principles and algorithms for the management of a network of media servers. Such a server network allows the online delivery of broadband multimedia data, e.g. audio and video streams, to a large number of widely distributed clients. Thus, the implementation of large scale distributed broadband media information services is possible if such networks can be handled efficiently. In the paper two new combinatorial optimization problems are defined that have to be solved for an efficient management of the distributed media servers connected by a high-bandwidth communication network. The algorithms consider the case of a static mapping of media assets onto the server network as well as the dynamic migration of media assets on such a network. The first scenario is used in the case that all media assets are loaded for the first time onto the server network. The second scenario is applied dynamically during run-time of an information service taking the varying user access pattern and changing media content of the server network into account. In this paper the algorithms are presented and their efficiency is demonstrated using some benchmark instances. The algorithms are part of a larger distributed system that allows the management of a network of distributed media servers. The principles of this system are presented as well as some applications that have been developed and are supported by this distributed server management system (DSMS).

关键词： Network servers Streaming media Bandwidth Mathematics Computer science Reactive power Large-scale systems multimedia systems Information systems Graphics

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Real-time content-based processing of multicast video

Real-time content-based processing of multicast video

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Proceedings of the 1998 32nd Asilomar Conference on Signals, systems & Computers. Part 1 (of 2)

作者： Zhou, Wensheng Vellaikal, Asha Shen, Ye Kuo, Jay C.-C. LLC Malibu United States

The access of high bandwidth multimedia data is generally limited to the network due to the limited network resources, inefficient indexing mechanism and less of semantic interpretations. Currently, most content-based video content representation involves the segmentation and indexing of video based on scene change and camera/object motion, and such research generally performs off-line video processing. Little research has been done on on-line video processing, which is crucial in video communication applications such as video conferencing, video multicasting and on-line video browsing and retrieval. Our research investigates real-time content-based processing of multicast video over the Internet. New on-line video feature extraction schemes, such as scene change detection, on-line key frame classification, are considered to meet the requirement of real-time video multicasting filtering based on user's profile over the Internet. The annotation and features extracted from multicasted videoconference bitstream by the on-line video content analysis proxies, which are using the proposed video processing algorithms, are output to a separate metadata channel for the further assistance of semantic multicasting of video content. The performance of the proposed algorithms is also demonstrated in the paper.

关键词： multimedia systems

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MPEG-4 - The emerging multimedia standard (invited)

MPEG-4 - The emerging multimedia standard (invited)

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2nd IEEE International Caracas Conference on Devices, Circuits and systems (ICCDCS 98)

作者： Rao, KR Univ Texas Dept Elect Engn Arlington TX 76019 USA

ISBN: (纸本)0780344340

This paper presents an overview of the aims and objectives of MPEG-4. This standard scheduled for November 1998 addresses content-based interactivity, universal access, robustness in error-prone environments, manipulation of objects, both synthetic and natural, etc., at various bit rates, quality levels and spatial/temporal resolutions. The standard is designed to accommodate different communication networks, processors and platforms through tools, algorithms and profiles.

关键词： Image coding

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content-based Retrieval in multimedia Databases Based on Feature Models

Content-based Retrieval in Multimedia Databases Based on Fea...

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作者： ApersP.M.G. KerstenM.L. University of British Columbia

With the increasing popularity of WWW, the main challenge in computer science has become content-based retrieval of multimedia objects. Until now access of multimedia objects in databases was done by means of keywords. Now, with the integration of feature-detection algorithms in database systems software, content-based retrieval can be fully integrated with query processing. In this paper, we describe our experimentation platform under development that fully integrates traditional query processing and content-based retrieval and that is based on feature databases, making database technology available to multimedia.

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content-based access of VRML libraries

Content-based access of VRML libraries

引用

IAPR International Workshop on multimedia Information Analysis and Retrieval, MINAR 1998

作者： Paquet, Eric Rioux, Marc Visual Information Technology Institute for Information Technology National Research Council Building M-50 Montreal Road OttawaONKlA 0R6 Canada

ISBN: (纸本)3540648267

This paper presents a new approach for the classification and retrieval of three-dimensional images and models from databases. A set of retrieval algorithms is introduced. These algorithms are content-based, meaning that the input is not made out of keywords but of three-dimensional models. Tensor of inertia, distribution of normals, distribution of cords and multiresolution analysis are used to describe each model. The database can be searched by scale, shape or color or any combination of these parameters. A user friendly interface makes the retrieval operation simple and intuitive and make it possible to edit reference models according to the specifications of the user. Experimental results using a database of more than 1000 VRML models are presented. © Springer-Verlag Berlin Heidelberg 1998.

关键词： Database systems

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Multiple object labeling in video sequences without skill

Multiple object labeling in video sequences without skill

引用

IEEE Workshop on content-Based access of Image and Video Libraries (CBAIVL)

作者： G. House S. Sakamoto J. Tajima C&C Media Res. Labs. NEC Corp. Kawasaki Japan C&C Media Research Laboratories NEC Corporation Limited Kawasaki Kanagawa Japan C&C Media Research Labs. NEC Corp Kawasaki Kanagawa Japan

The current trend for integrating media of various forms has treated video sequences as object components. Video processing algorithms which automatically extract objects from video sequences need to be fine-tuned to suit the different video contents. The algorithms themselves, however, tend to be too complicated for multimedia-content editors without skills in video processing. We present a framework for use in a multimedia authoring system, that assists unskilled users in labeling objects. Image selection trains pixel- and region-unit feature extraction approaches which were devised to assist editor understanding. Furthermore, a graphical user interface is presented for the tracking stage which enables convenient editor training and label correction. The main part of the framework was implemented on a real-time parallel image processing system. The system was used to label jockeys in a horse racing sequence, achieving a factor of ten time reduction over a comparable manual labeling process.

关键词： Labeling Video sequences multimedia systems Authoring systems Pixel Feature extraction Graphical user interfaces Real time systems Image processing Horses

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content-based representative frame extraction for digital video

Content-based representative frame extraction for digital vi...

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IEEE International Conference on multimedia Computing and systems (ICMCS)

作者： Xinding Sun M.S. Kankanhalli Yongwei Zhu Jiankang Wu RWC Novel Function ISS Lab Kent Ridge Digital Laboratories Singapore Singapore Department of Electrical Engineering Indian Institute of Science Bangalore India

We consider a content-based adaptive clustering algorithm (CBAC) to extract a fixed pre-determined number of representative frames to summarize a given digital video. In our algorithm, shot boundary detection is not needed. The inter-frame changes are compared globally for the extraction of representative frames. Small units of the video are dynamically clustered into two clusters based on the amount of change in content within the unit. One cluster, which has units of low content change, is designated for deletion and the other cluster, which has units of high content change, is for retention. The algorithm adaptively converges to the desired number of frames by deleting some redundant frames from each unit of the deletion cluster during every iteration.

关键词： Gunshot detection systems Motion detection Random access memory Ferroelectric films Nonvolatile memory Sun Clustering algorithms Shape HTML Video sequences

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Real-time content-based processing of multicast video

Real-time content-based processing of multicast video

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Asilomar Conference on Signals, systems & Computers

作者： Wensheng Zhou A. Vellaikal Ye Shen J.C.-C. Kuo Information Sciences Lab HRL Laboratories LLC Malibu CA USA Integrated Media System Center Department of Electrical Engineering-Systems University of Southern California Los Angeles CA USA

The access of high bandwidth multimedia data is generally limited to the network due to the limited network resources, inefficient indexing mechanism and less of semantic interpretations. Currently, most content-based video content representation involves the segmentation and indexing of video based on scene change and camera/object motion, and such research generally performs off-line video processing. Little research has been done on on-line video processing, which is crucial in video communication applications such as video conferencing, video multicasting and on-line video browsing and retrieval. This research investigates real-time content-based processing of multicast video over the Internet. New on-line video feature extraction schemes, such as scene change detection, on-line key frame classification, are considered to meet the requirement of real-time video multicasting filtering based on the user's profile over the Internet. The annotation and features extracted from a multicast videoconference bitstream by the on-line video content analysis proxies, which are using the proposed video processing algorithms, are output to a separate metadata channel for the further assistance of semantic multicasting of video content. The performance of the proposed algorithms is also demonstrated.

关键词： Videoconference Indexing Layout Internet Feature extraction Multicast algorithms Bandwidth Cameras Information filtering Information filters

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