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作者： C. Doulaverakis Y. Kompatsiaris M.G. Strintzis Centre for Research and Technology Informatics and Telematics Institute Thessaloniki Greece Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

In this paper, an approach for providing unified access to heterogeneous distributed cultural heritage collections is presented. The proposed approach is developed within the framework of the REACH Greek National Project with the overall aim to provide a Web portal enabling access to different databases of cultural content with emphasis on multimedia material. In order to achieve this, the project employs ontology-based representation of cultural content, multimedia content-based search algorithms, hybrid ontology and content-based access and user-friendly search interfaces. This fusion approach provides users with resources for building queries of multimedia repositories sequentially using multiple individual search tools, and performs higher quality searching. In the current stage of development, real content such as inscriptions and coins from the Greco-Roman time period, has successfully been incorporated in the system

关键词： Ontologies Cultural differences Portals multimedia databases Information retrieval content based retrieval Material storage multimedia systems Informatics Telematics

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Affinity Hybrid Tree: An Indexing Technique for content-Based Image Retrieval in multimedia Databases

Affinity Hybrid Tree: An Indexing Technique for Content-Base...

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IEEE International Symposium on multimedia

作者： Kasturi Chatterjee Shu-ching Chen Distributed Multimedia Information System Laboratory School of Computing and Information Sciences Florida International University Miami FL USA

ISBN: (纸本)0769527469;9780769527468

A novel indexing and access method, called affinity hybrid tree (AH-tree), is proposed to organize large image data sets efficiently and to support popular image access mechanisms like content-based image retrieval (CBIR) by embedding the high-level semantic image-relationship in the access mechanism as it is. AH-tree combines space-based and distance-based indexing techniques to form a hybrid structure which is efficient in terms of computational overhead and fairly accurate in producing query results close to human perception. algorithms for similarity (range and k-nearest neighbor) queries are implemented. Results from elaborate experiments are reported which depict a low computational overhead in terms of the number of I/O and distance computations and a high relevance of query results. The proposed index structure solves the existing problems of introducing high-level image relationships in a retrieval mechanism without going through the pain of translating the content-similarity measurement into feature-level equivalence and yet maintaining an efficient structure to organize the large sets of images

关键词： Indexing Information retrieval Image retrieval content based retrieval multimedia databases multimedia systems Multidimensional systems Indexes Image databases multimedia computing

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ACO-based media content adaptation for e-learning environments

ACO-based media content adaptation for e-learning environmen...

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IEEE International Conference on Computational Intelligence and Virtual Environments for Measurement systems and Applications

作者： M. Shamim Hossain Mehedi Masud Abdulhameed A. Alelaiwi Abdullah Alghamdhi Software Engineering Dept. King Saud University Riyadh KSA Computer Science Dept. Taif University KSA

The advances of ubiquitous communication infrastructures, the rapid adoption of mobile devices and pervasive computing technologies has allowed e-learning users access to multimedia learning contents in e-learning environments. However, because of the diversity and heterogeneity of the mobile users, their preferences, and the rich multimedia learning content, it is a major challenge for the access of learning content by the desired devices in the e-learning environment to user's satisfaction in terms of QoS demands. In order to alleviate the challenge of learning content mismatch, content adaptation is essential. To this end, we propose an ACO-based multimedia content adaptation approach, which inherits the adoption of ACO-based path selection behavior in the path computation for appropriate learning content customization. We compare our proposed approach with other two competitive algorithms, measure the performance and find that our proposed algorithms outperforms the basic AntNet and Genetic in terms of success rate, latency, runtime comparison and convergence. The performance evaluations are conducted using NetLogo simulation environment.

关键词： Electronic learning Quality of service Media Genetics Context Time factors Routing

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Replicating the contents of a WWW multimedia repository to minimize download time

Proceedings of the International Parallel Processing Symposi...

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Proceedings of the International Parallel Processing Symposium, IPPS 2000年 500-505页

作者： Loukopoulos, Thanasis Ahmad, Ishfaq Hong Kong Univ of Science and Technology Hong Kong Hong Kong

Dynamic replication algorithms aim at allocating, migrating and deleting copies of an object over various Internet hosts, according to the access patterns exhibited on-line, so as to improve object proximity for the end-users and/or load-balance the servers. Most of the existing algorithms try to disseminate the objects of an entire Internet Service Provider (ISP), without taking into account the needs and characteristics of specific web sites with large commercial value. In this paper we tackle the replication problem in an Internet environment, inspired by the need of news agencies and other information providers to include in their pages multimedia content without incurring high access delays. We consider an environment that consists of a central multimedia repository and various physically dispersed sites. We propose a cost model to formalize the replication of multimedia objects located at the repository which can result in decreasing the download time. Taking into account implementation issues, such as the storage and processing capacity constraints, the proposed replication policy is evaluated and compared with alternatives including an ideal LRU caching scheme. Qualitative comparisons with the other replication schemes are reported as well.

关键词： Parallel processing systems

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Assessment of the effects of 5G MEC cache on DASH adaptation algorithms

Assessment of the effects of 5G MEC cache on DASH adaptation...

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IEEE International Symposium on Broadband multimedia systems and Broadcasting (BMSB)

作者： Roberto Viola Danilo Amendola Zaloa Ferná ndez Á lvaro Gabilondo Mikel Zorrilla Pablo Angueira Mikel Casals Jon Montalbá n Vicomtech Foundation Basque Research and Technology Alliance San Sebasti&#x00E1 n Spain Department of Communications Engineering University of the Basque Country Bilbao Spain Tecnun Universidad de Navarra San Sebasti&#x00E1 Department of Electronic Technology University of the Basque Country Bilbao Spain

Nowadays, video streaming services are the major sources of Internet traffic, and their usage is constantly growing. To cope with this increasing video traffic demand, 5G comes with a new Radio access Network (RAN), having increased network data rates, and the Multi-access Edge Computing (MEC) architecture, enabling the deployment of services closer to the end devices. 5G RAN and MEC open to new opportunities to enforce and boost the video content delivery, as the content can be cached locally at the MEC host and served with improved RAN connectivity. However, the presence of a cache located at MEC may affect player adaptation algorithm when employing Adaptive Bitrate (ABR) streaming technologies, such as Dynamic Adaptive Streaming over HTTP (DASH). The cache influences the network measurements performed by the DASH player, which are later used, among other factors, by its adaptation algorithm to select the video representation bitrate. This paper investigates the interactions between MEC cache and DASH adaptation algorithms in a real testbed, including 5G RAN and MEC platform. The effects on different adaptation algorithms are analyzed while caching the DASH video content at the MEC.

关键词： Multi-access edge computing 5G mobile communication Heuristic algorithms Bit rate Quality of service Computer architecture Streaming media

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multimedia summaries of broadcast news

Multimedia summaries of broadcast news

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Australian and New Zealand Conference on Intelligent Information systems

作者： M.T. Maybury A.E. Merlino Advanced Information Systems Center MITRE Corporation Bedford MA USA

Increasing amounts of text, audio, and video content has fueled efforts to provide direct, content based access to these materials. Summaries are often necessary to enable timely relevancy assessments, information extraction, or information analysis from source material. Whereas text summarization research is receiving increasing attention, comparatively few investigators have examined video summarization. We report on the extension of a broadcast news access system to provide multimedia summaries. We briefly overview our system for video analysis, focusing on our novel integration of image, speech and language processing techniques to support automated video summarization. We outline algorithms for proper name and keyphrase extraction, story segmentation, and key frame extraction which together underpin our current ability to automatically summarize video. We describe the systems ability to generate multimedia video summaries tailored to a user query. We discuss evaluation metrics for measuring the (quality) value of these summary artifacts.

关键词： Digital multimedia broadcasting multimedia communication multimedia systems Speech analysis Data mining Information analysis Image analysis Speech processing Natural languages Image segmentation

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Using category-based collaborative filtering in the Active WebMuseum

Using category-based collaborative filtering in the Active W...

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IEEE International Conference on multimedia and Expo (ICME)

作者： A. Kohrs B. Merialdo Department of Multimedia Communications Institut EURECOM Sophia-Antipolis France

Collaborative filtering is an important technology for creating user-adapting Web sites. In general the efforts of improving filtering algorithms and using the predictions for the presentation of filtered objects are decoupled. Therefore, common measures (or metrics) for evaluating collaborative filtering (recommender) systems focus mainly on the prediction algorithm. It is hard to relate the classic measurements to actual user satisfaction because of the way the user interacts with the recommendations, determined by their representation, influences the benefits for the user. We propose an abstract access paradigm, which can be applied to the design of filtering systems, and at the same time formalizes the access to filtering results via multi-corridors (based on content-based categories). This leads to new measures which better relate to the user satisfaction. We use these measures to evaluate the use of various kinds of multi-corridors for our prototype user-adapting Web site, the Active WebMuseum.

关键词： Collaboration Active filters Information filtering Information filters Filtering algorithms Prediction algorithms Prototypes Recommender systems multimedia communication Measurement standards

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Multiple object labeling in video sequences without skill

Multiple object labeling in video sequences without skill

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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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Achieving Interoperability in Conditional access systems through the Dynamic Download and Execution of Cryptographic Software for the IPTV System

Achieving Interoperability in Conditional Access Systems thr...

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International Conference on Convergence Information Technology

作者： Jinyoung Moon Jungtae Kim Jongyoul Park Euihyun Paik U-Computing Research Group Electronics and Telecommunications Research Institute South Korea

An IPTV system that transmits multimedia contents through the IP network needs to adopt a conditional access system allowing the only entitled subscribers to view the premium content as other pay-TV systems do. Although several standard specifications have been published for interoperable models of conditional access systems, the proposed models are based on the unidirectional or restricted bidirectional broadcasting network and do not utilize the characteristics of the IP network. However, software download scheme through the bidirectional IP network enables it to change existing conditional access systems in a secure way. This paper introduces an interoperable conditional access system that can update any cryptographic software provided by different conditional access system vendors through downloading and executing dynamically the downloaded conditional access software only if the software follows the pre-defined interfaces.

关键词： Cryptography IPTV IP networks Software algorithms Satellite broadcasting multimedia systems Security multimedia communication Information technology Moon

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Fuzzy mining of multimedia genre applied to television archives

Fuzzy mining of multimedia genre applied to television archi...

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IEEE International Conference on multimedia and Expo (ICME)

作者： Alberto Messina Maurizio Montagnuolo RAI Radiotelevisione Italiana Centre for Research and Technological Innovation Torino Italy Department of Computer Science University of Turin Torino Italy

The quantity of multimedia content available either through the traditional distribution channels, such as broadcast television, or through new platforms like the Internet, is continuously increasing. Tools for user-oriented access to desired information are thus needed. In this paper, we illustrate a novel fuzzy multimedia mining technique for genre characterisation, aimed at overcoming limitations of conventional crisp classification systems. Effective results in genre classification and characterisation are presented based on the extraction of structural and cognitive properties of the content.

关键词： multimedia communication Feature extraction Data mining Classification algorithms Face Streaming media TV

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