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Multimedia Technology

Multimedia Technology. A Graduate Course Fall Semester 2009 Prof. Dr. Wolfgang Effelsberg University of Mannheim Germany. Table of Content (1). 1. Introduction 1.1 What is a multimedia system? 1.2 Fundamentals and terminology 2. Compression Algorithms for Multimedia Data Streams

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Multimedia Technology

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  1. Multimedia Technology • A Graduate Course • Fall Semester 2009 • Prof. Dr. Wolfgang Effelsberg • University of Mannheim • Germany

  2. Table of Content (1) • 1. Introduction • 1.1 What is a multimedia system? • 1.2 Fundamentals and terminology • 2. Compression Algorithms for Multimedia Data Streams • 2.1 Fundamentals of data compression • 2.2 Compression of still images • 2.3 Video compression • 2.4 Audio compression • 3. Multimedia Communication • 3.1 Internet technology, as it is today • 3.2 Quality of Service in networks • 3.3 Resources and QoS provisioning • 3.4 Multicast • 3.5 Media scaling and media filtering

  3. Table of Content (2) • 4. Automatic Content Analysis • 4.1 Basic parameters for video analysis • 4.2 Deriving video semantics • 4.3 Basic parameters for audio analysis • 4.4 Deriving audio semantics • 4.5 Application examples

  4. Recommended Reading (1) • (ordered by relevance for this course) • R. Steinmetz, K. Nahrstedt: Multimedia Systems. Springer-Verlag, Berlin, Heidelberg, New York, 2004 • R. Steinmetz, K. Nahrstedt: Multimedia Applications. Springer-Verlag, Berlin, Heidelberg, New York, 2004 • R. Steinmetz: Multimedia-Technologie – Grundlagen, Komponenten und Systeme. 3. Auflage, Springer Verlag, Heidelberg, Berlin, New York, 2000 • 4. F. Kuo, W. Effelsberg, J.J. Garcia-Luna-Aceves: Multimedia Communications – Protocols and Applications. Prentice Hall, Upper Saddle River, 1998 • 5. W. Effelsberg, R. Steinmetz: Video Compression Techniques. dpunkt.Verlag, Heidelberg, 1998 • 6. W. B. Pennebaker, J. L. Mitchell: JPEG Still Image Compression Standard. Van Nostrand Reinhold, New York, 1993

  5. Recommended Reading (2) • 7. J. L. Mitchell, W. B. Pennebaker, Ch. E. Fogg, D. J. LeGall: MPEG Video Compression Standard. Chapman&Hall, New York, 1996 • 8. All issues of ACM Transactions on Multimedia Computing, Communications and Applications • 9. All issues of IEEE Multimedia • 10. All issues of the Springer MultimediaSystems Journal • 11. All issues of IEEE Transactions on Multimedia • 12. All issues of the Springer Journal on Multimedia Tools andApplications

  6. Acknowledgement • I would like to thank my colleagues Jana Dittmann, Thomas Haenselmann, Stephan Kopf, Jörg Liebeherr, Carsten Vogt, Ralf Steinmetz and Lars Wolf for allowing me to use some of their transparencies in this course. Their support is gratefully acknow-ledged.

  7. Introduction • A multimedia system supports the integrated storage, transmission and representation of the discrete media types text, graphics and image and the continuous media types audio and video on a digital computer.

  8. A Digital Multimedia System • The media streams are digital. They can be processed (e.g., compressed/ decompressed, analyzed) in the computer.

  9. Time-Independent and Time-Dependent Media • Time-Independent Media • Information is not related to the timing of the data stream • All „classic“ media in the computer, such as: • text • graphics (line drawings, vector graphic) • image (photo, pixel graphics). • Time-Dependent Media • Information is time-related, must be shown to the user at specific points in time • Continuous data streams • Data appears in regular intervals • Examples: • Audio (continuous) • Video (continuous) • An animation(not a continuous stream, but time-dependent) • An interactive game on the Internet (not a continuous stream, but has real-time require-ments)

  10. Our Definition of Multimedia • A multimedia system is characterized by the integrated • production, • processing, • storage, • transmission • and representation of several time-dependent and time-independent media streams.

  11. Bandwidth of perception at the man-machine interface Audio Motion Video signal processor optical disc fiber Graphics te xt te xt te xt te xt bitmap displays pointing devices Text Text Text card reader teletype CRT terminal 1950 1960 1970 1980 1990+ time History of Bandwidth in Computer Networks

  12. Network Requirements of Different Types of Data Streams

  13. Goals of Compression • The compression of multimedia data streams saves • storage space • transmission bandwidth

  14. Conclusion • Modern multimedia systems are all-digital. • We define multimedia as the integrated production, processing, storage, transmission and representation of several time-dependent and time-in-dependent media streams. • Compression is a key technology for all multimedia systems. • The arrival of high-speed components and large amounts of storage space allows new interactive interfaces.

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