VIPromCom-2000 INVITED PAPERS
Rajko Svecko and Dusan Gleich; Slovenia:
Video coding based on wavelet transforms
In the article we present a three-dimensional (3D) subband-based video codec that is fast and efficient and poses the multimedia functionality of resolution. A video compression scheme needs to exploit both spatial and temporal correlation to be effective. Among many of the techniques, motion compensation is widely used to remove inter frame redundancies. Subband coding has been known as a very effective coding technique that was introduced in 1986 by Woods. Shapiro introduced the embedded coding scheme based on significance tree quantization for still image coding as a zero tree wavelet coder. Subband coding of image sequence has been intensively investigated. One of these research efforts is a two-dimensional subband coding scheme with motion compensation using the zero-tree method, which performs subband decomposition on each frame, estimates motion vectors within each subband and codes display frame difference using the zero-tree method. We present three-dimensional extension of the highly successful set partitioning in hierarchical trees (SPIHT) still image codec and 3D wavelet codec system. The system is appropriate for low bit rate embedded video coding.
Zarko Cucej received a B.Sc. degree from the Faculty of Electrical Engineering, University of Ljubljana, Slovenia in 1976, and M.Sc. and Ph.D. degree from the Faculty of Technical Sciences in Maribor in 1984. and 1990. respectively, all in electrical engineering. His previous appointments in the industry were as Design and Chief Engineer (1971.-1985.). Since 1985. he is with the Faculty of Electrical Engineering and Computer Science where is now Associate Professor. He was a Visiting Professor at the Virginia Polytechnic Institute and State University, Blacksburg, USA in 1995, and guest researcher in DLR/DFD Oberpfaffenhofen, Germany in 1997. and 1998. His present research interests are in the field of modulation, image processing and remote control. Dr. Cucej is a member of IEEE.
MPEG-4 Standard for Audio-Visual Representation
MPEG-4 is the first audio-visual representation standard modeling an audio-visual scene as a composition of audio-visual objects with specific characterictics and behavior. The individual manipulation and transportation of audio-visual objects is achieved by a set of tools defined in several parts of the standard. MPEG-4 scene is potentially composed of multiple objects implies that profiles and levels must give bounds for the total of objects in the scene. The MPEG-4 representation approach allows the composition of natural and synthetic data in the same scene, unifying the two separate, but complementary worlds. The Synthetic and Natural Hybrid Coding (SNHC) technology standardized in MPEG-4 Version 1 will support applications such as multimedia broadcasting and presentations, virtual talking humans, advanced interpersonal communication systems, games, language teaching, teleshopping, etc. Recently, one of the most important application is the representation and compression of facial animation. The animation of 3D facial models, requires animation data, which may be synthetically generated or extracted by analysis from real faces. In MPEG-4, face animation is carried out using animation parameters (FAP`s). The DMIF (Delivery Multimedia Integration Framework) is a general application and transport delivery framework specified by MPEG-4. DMIF`s main purpose is to hide the details of the transport network from the user, as well as to ensure signaling and transport interoperability between endsystems. This presentation summarizes the main aspects of the MPEG-4 systems (requirements, architecture, tools) and also the several coding facilities, as well as some typical applications.
Kalman Fazekas was born in Budapest on 4th November, 1938. His nationality: Hungarian. He received the M.Sc. degree in electrical engineering in 1962, and in teacher engineering in 1968 from the Technical University of Budapest. Since 1967, he is ass. professor at the Department of Microwave Telecommunications. He is the head of Signal Processing and Multimedia Laboratory. His research interest and activity includes image coding, image processing, parallel processing, and multimedia technology. He participates in the following international projects: COST 229: Applications of Digital Signal Processing to Telecommunications (1992-1995), COST 254: Intelligent Processing and Facilities for Communication Terminals (started in 1996) COPERNICUS 1529: Development of Teleworking and Multimedia Services over High Speed Digital Network (1995-1997) MANADIX Research Network: Motion Analysis for Advanced Image Communication Systems (1995-1997), Phare-Accord Programme: "MASIP" project: Massively Parallel Implementation of Algorithms for Signal and Image Processing Systems (1994-1995), CEEPUS. His professional activities are: Hungarian representative of COST TC-TIST, Senior Member of IEEE, Secretary of IEEE Joint COM, ED, AP, MTT Chapter of IEEE Hungary Section, Member of EURASIP, Member of EUROMICRO, correspondent of EUROMICRO Board, Member of MMEV (World Federation of Hungarian Engineers and Architects), Member of Editorial Board of International Journal "Image Processing & Communications", and 2 Journal of Electrical Engineering2 , Guest Editor of "Communications" Journal in 1994, Chairman and organizer of several international workshops conferences, and meetings. Author and coauthor of 10 text-books, more than 20 longer research studies, and more than 150 papers and conference presentations, master theses.
Application of Multimedia in Distance Education
The conception and structure of the open and flexible system for distance education based on application of multimedia is presented. The philosophy and methodology of the training of expert team for development of educational materials and provisioning of the training process is described. The modern digital communication infrastructure, including new evolution steps in the platform and architecture of intelligent networks (IN) with integration of IP networks into IN, provides new opportunities and approaches in application of multimedia in continuing education. The results and experience of the running TEMPUS-PHARE projects oriented to application of multimedia in distance education are presented.
Pavol Podhradsky is an university professor at the Telecommunication Department of the Slovak University of Technology (STU) in Bratislava. He received his M.Sc. degree in 1965 and Ph.D. degree in 1980, both from Slovak University of Technology in Bratislava, Slovakia. His research orientations are in signal processing and currently in intelligent networks, WDM optical networks and satellite communications. He is project coordinator of the basic research projects granted by Slovak government and leader of the research team at Telecommunication Department of the STU Bratislava participated in COSTs projects. During last ten years he has been project coordinator of four international TEMPUS-PHARE projects. Last two projects are oriented to application of multimedia in teleteaching.
Burakowski, A. Beben; Poland:
Traffic Control Mechanisms for Wireless ATM Networks
ATM Standard in Operator's Network
The main goal of the work is to overview current position of ATM technology in multiservice operator’s network. There is growing belief that it is necessary to reshape traditional TDM networks into more advanced platform using ATM equipment. Recently significantly more attention is paid to IP-based all-purpose network solutions but current state-of-the-art. of IP, with DiffServ, IntServ, RSVP and MPLS does not allow to make this move at present.
Krzysztof Wajda received his M. Sc. in Telecommunications from University of Mining and Metallurgy in 1982 and Ph. D. in 1990. In 1982 he joined UMM where he was responsible for laboratory of switching technology. During period 1991-1993 he was granted a Monbusho (Japanese Ministry of Education) scholarship in Osaka University and Kyoto University. In 1996 he spent 6 months of sabbatical leave in CNET (France) working on Adaptive Connection Admission Control (CAC) in ATM networks. He was involved in few international projects: COST 242, Copernicus ISMAN, ACTS 038 BBL, TEMPUS JEP N° 0971 and was granted TEMPUS individual grant IMG-96-PL-2057. He participated also in few grants supported by National Science Foundation (in 2 was involved as a project leader). He serves also as a reviewer of few journals: Telecommunications Systems, Performance Evaluation, Computer Networks and ISDN Systems and international conferences. He has been a consultant to private telecommunication companies and Polish Telecom. Main research interests: traffic management for broadband networks, multimedia services, architecture and implementation of ATM networks, performance evaluations of fast packet networks, internetworking. Author (or coauthor) of 5 books (in Polish) and over 70 technical papers.
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