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作者： T. Ura R. Bahl M. Sakata J. Kojima T. Fukuchi J. Ura K. Mori T. Nakatani Y. Nose H. Sugimatsu Underwater Technology Research Center Institute of Industrial Science University of Tokyo Meguro Tokyo Japan KDD Research and Development Laboratories Inc. Kamifukuoka Saitama Japan System Giken Corporation Chigasaki Kanagawa Japan Department of Computer Engineering and Network Engineering Waseda University Shinjuku Tokyo Japan Ogasawara Whale Watching Association Chichijima Ogasawara Tokyo Japan

Sperm whales are known to dive to a depth of over two thousand meters. They emit loud impulsive broadband sounds called "clicks" during their diving. To investigate the sperm whale behavior, we attempt to apply the autonomous underwater vehicle (AUV) as an observation platform for sperm whales. AUV recognizes sperm whales individually and tracks them by listening to their clicks. As an initial stage for these objectives, we set up an experiment to test our observation system using two boats without an AUV. The observation system consists of two sets of 4-hydrophone arrays. Each hydrophone array works as a short baseline (SBL) system. The SBL system detects sperm whale clicks and calculates the orientation to sperm whales. Two relative directions from the two SBL arrays separated over a long base line (LBL) tell us the position of whale by triangulation. In the middle of August 2003, we carried out an experiment of the test system off Chichijima Island in Ogasawara. We deployed two boats each with a hydrophone array. An acoustic link between the SBL arrays was established to obtain the LBL length. During the experiments over five days we encountered at least fourteen sperm whales and succeeded in tracking some sperm whales by our observation system. Later in September 2004, we will perform another experiment using an AUV that works as one of the SBL systems. We expect this AUV-based observation system will give us a better understanding of sperm whale diving behavior and eco-system

关键词： Whales Sonar equipment Boats Underwater tracking System testing Acoustical engineering Underwater vehicles Acoustic arrays Humans Sea surface

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An efficient video classification system based on HMM in compressed domain 4

An efficient video classification system based on HMM in com...

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Joint Conference of the 4th International Conference on Information, Communications and Signal Processing and 4th Pacific-Rim Conference on Multimedia, ICICS-PCM 2003

作者： Haoran, Yi Rajan, Deepu Liang-Tien, Chia Center for Multimedia and Network Technology School of Computer Engineering Nanyang Technological University Singapore

ISBN: (纸本)0780381858

In this paper, we present our method for effective and efficient classification of different types of video that make use of the low level visual features, color and motion features. The color features, similar to the MPEG-7 Scalable Color Descriptors, are the compressed color histograms extracted from the DC images of the video sequences. The motion features, similar to MPEG-7 Motion Activity Descriptors, are extracted from the motion vectors. Both features are extracted from the compressed domain and give a good characterization of the video in both the spatial and temporal dimension. We then classify different types of video using Hidden Markov Model. First, we train the Hidden Markov Model for each type of video. Then the trained HMMs are used to classify incoming videos using maximum likelihood classification. © 2003 IEEE.

关键词： Hidden Markov models

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A two-phase scatternet formation protocol for Bluetooth wireless personal area networks

A two-phase scatternet formation protocol for Bluetooth wire...

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2003 IEEE Wireless Communications and networking Conference: The Dawn of Pervasive Communication, WCNC 2003

作者： Kawamoto, Yoji Wong, Vincent W. S. Leung, Victor C. M. Network and Software Technology Center Sony Corporation Tokyo Japan Department of Electrical and Computer Engineering University of British Columbia VancouverBC Canada

ISBN: (纸本)0780377001

Bluetooth is a promising short-range radio technology for wireless personal area networks. There is an interest to expand the coverage of such networks by interconnecting them to form scatternets. Most of the scatternet formation algorithms recently proposed in the literature do not support dynamic topology changes, and the master of bridge nodes in the resulting scatternet may become the traffic bottleneck and reduce network throughput. In this paper, we propose a two-phase scatternet formation (TPSF) protocol to support dynamic topology changes while maintaining a high aggregate throughput. In the first phase, a control scatternet is constructed to support topology changes and route determination. The second phase creates a separate on-demand scatternet whenever a node wants to initiate data communications with another node. The on-demand scatternet is torn down when the data transmissions are finished. Since all the time slots in an on-demand scatternet are dedicated to a single communication session, a high aggregate throughput is achieved at the expense of a slightly higher connection setup delay. © 2003 IEEE.

关键词： Bluetooth

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Augmented video conferencing 23

Augmented video conferencing

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23rd International Conference on Distributed Computing Systems Workshops, ICDCSW 2003

作者： Shih, T.K. Chuang, Jung-Ken Lin, N.H. He, A. Multimedia Information Network Lab. Department of Computer Science and Information Engineering Tamkang University Taiwan Core and Information Technology Center University of Aizu Japan

ISBN: (纸本)0769519210

Distance learning programs use on-line video records to deliver pre-recorded lectures. And, video communication systems can be used as a discussion tool. In this paper, we start our discussion on a multimedia presentation recording system which we had developed. We then present how the video recording concept can be further extended to realize an augmented video conferencing system, which can be used as a peer-to-peer discussion tool, as well as a lecture broadcasting system. We also point out that an object tracking technology can be further integrated to enhance the tool, to enable a more realistic and useful system for the discussion in distance education. © 2002 IEEE.

关键词： Video recording

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An efficient video classification system based on HMM in compressed domain

An efficient video classification system based on HMM in com...

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International Conference on Information, Communications and Signal Processing

作者： Yi Haoran D. Rajan Chia Liang-Tien Center for Multimedia and Network Technology School of Computer Engineering Nanyang Technological University Singapore

ISBN: (纸本)0780381858

In this paper, we present our method for effective and efficient classification of different types of video that make use of the low level visual features, color and motion features. The color features, similar to the MPEG-7 scalable color descriptors, are the compressed color histograms extracted from the DC images of the video sequences. The motion features, similar to MPEG-7 motion activity descriptors, are extracted from the motion vectors. Both features are extracted from the compressed domain and give a good characterization of the video in both the spatial and temporal dimension. We then classify different types of video using hidden Markov model. First, we train the hidden Markov model for each type of video. Then the trained HMMs are used to classify incoming videos using maximum likelihood classification.

关键词： Video compression Hidden Markov models Image coding MPEG 7 Standard Histograms Feature extraction Pattern classification Intelligent networks computer networks Video sequences

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A two-phase scatternet formation protocol for Bluetooth wireless personal area networks

A two-phase scatternet formation protocol for Bluetooth wire...

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IEEE Conference on Wireless Communications and networking

作者： Y. Kawamoto V.W.S. Wong V.C.M. Leung Network & Software Technology Center Sony Corporation Tokyo Japan Department of Electrical and Computer Engineering University of British Columbia Vancouver BC Canada

关键词： Scattering Wireless application protocol Bluetooth Wireless personal area networks network topology Throughput Aggregates Data communication Bridges Communication system traffic control

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Augmented video conferencing

Augmented video conferencing

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International Conference on Distributed Computing Systems Workshop

作者： T.K. Shih Jung-Ken Chuang N.H. Lin A. He Multimedia Information Network Laboratory Department of Computer Science and Information Engineering Tamkang University Taiwan Core and Information Technology Center University of Aizu Japan

关键词： Videoconference computer aided instruction Streaming media Distance learning Multimedia systems Electronic mail Video recording Multimedia communication Educational technology Communications technology

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Optical burst and packet switching: Node and network design, contention resolution and quality of service - Results from the study in COST 266 7

Optical burst and packet switching: Node and network design,...

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7th International Conference on Telecommunications, ConTEL 2003

作者： Bjørnstad, Steinar Nord, Martin Hjelme, Dag.R. Stol, Norvald Callegati, Franco Cerroni, Walter Raffaelli, Carla Zaffoni, Paolo Gauger, Christoph M. Develder, Chris Cheyns, Jan Van Breusegem, Erik Baert, Elise Colle, Didier Pickavet, Mario Demeester, Piet Lacković, Marko Careglio, Davide Junyent, Gabriel Klinkowski, Miroslaw Marciniak, Marian Kowalewski, Marian Internet Network Architecture Telenor R and D Oslo Norway Department of Physical Electronics NTNU/UNIK Trondheim Norway Department of Telematics NTNU/UNIK Trondheim Norway Research Center COM DTU Lyngby Denmark DEIS University of Bologna Bologna Italy University of Stuttgart Institute of Communication Networks and Computer Engineering Stuttgart Germany Ghent University IMEC Ghent Belgium Department of Telecommunications Faculty of Electrical Engineering and Computing Unska 3 Zagreb Croatia Universitat Politècnica de Catalunya Advanced Broadband Communications Labs. CatalunyaBarcelona Spain National Institute of Telecommunications Department of Transmission and Fiber Technology Warsaw Poland

ISBN: (纸本)9531840520

Future network should be able to efficiently serve packet-based networks, such as the Internet. In this paper, based on results from COST 266, we explore characteristics of Optical Burst switching (OBS) and Optical Packet Switching (OPS). Both node design and Metropolitan Area network (MAN) are discussed. A unique joint comparative performance evaluation of contention resolution in OBS and OPS are presented, as well as methods of Quality of Service (QoS) differentiation in OBS/OPS networks, and their performance. © 2003, Institute of Electrical and Electronics Engineers Inc. All rights reserved.

关键词： Quality of service

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Optical burst and packet switching: node and network design, contention resolution and quality of service

Optical burst and packet switching: node and network design,...

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International Conference on Telecommunications (ConTEL)

作者： S. Bjornstad M. Nord D.R. Hjelme N. Stol C. Develder J. Cheyns E. Van Breusegem E. Baert D. Colle M. Pickavet P. Demeester F. Callegati W. Cerroni C. Raffaelli P. Zaffoni M. Lackovic C.M. Gauger D. Careglio G. Junyent M. Klinkowski M. Marciniak M. Kowalewski Internet Network Archit. Telenor R&D Oslo Norway Department of Information Technology (INTEC) IMEC Ghent University Ghent Belgium Research Center COM DTU Fotonik Technical University of Denmark Kongens Lyngby Denmark Physical Electronics Switzerland Telematics NTNURJNIK Trondheim Norway Department of Telecoinmunications Zagreb Croatia DEIS Università di Bologna Bologna Italy Institute of Communication Networks and Computer Engineering University of Stuttgart Stuttgart Germany Department of Transmission and Fiber Technology National Institute of Telecommunications Warsaw Poland Advanced Broadband Communications Labs Universitat Polidènica de Catalunya Catalonia Spain

Future network should be able to efficiently serve packet-based networks, such as the Internet. In this paper, based on results from COST 266, we explore characteristics of optical burst switching (OBS) and optical packet switching (OPS). Both node design and metropolitan area network (MAN) are discussed. A unique joint comparative performance evaluation of contention resolution in OBS and OPS are presented, as well as methods of quality of service (QoS) differentiation in OBS/OPS networks, and their performance.

关键词： Optical fiber networks Optical packet switching Packet switching Optical design Quality of service Optical buffering IP networks Circuits Telecommunication switching Costs

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Preface

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2003年 2713卷

作者： Chung, Chin-Wan Kim, Chong-Kwon Kim, Won Ling, Tok-Wang Song, Kwan-Ho Korea Advanced Institute of Science and Technology Division of Computer Science 373-1 Guseong-Dong Yuseong-Gu Daejeon Korea Republic of Seoul National University Dept. of Computer Engineering San 56-1 Shillim-Dong Gwanak-Gu Seoul Korea Republic of Cyber Database Solutions Inc 3445 Executive Center Drive Suite 256 TX United States National University of Singapore Dept. of Computer Science 3 Science Drive 2 Singapore Singapore Korea Network Information Center 11F KTF B/D 1321-11 Seocho2-Dong Seocho-Gu Seoul Korea Republic of

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