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Departments >> Faculty of Engineering >> Department of Computer Science >> Chair of Computer Science 6 (Data Management) >>
RETAVIC - Real-Time Audio-Video Conversion

The goal of the RETAVIC project is to develop a real-time audio-video conversion that can extend the functionality of available (or newly developed) multimedia servers (MMS) and multimedia database management systems (MMDBMS) allowing them to provide a format-independent audio-video content to end-user regardless the internal storage format. This will provide the data independence, which is one of the foundations of the database management systems, in such a way that the format of served audio-video streams is prepared on-the-fly depending on the client desires for specific characteristics imposed also by the client’s resources (e.g. available equipment, network connection or used applications).
The conversion of the multimedia data has to be executed in real-time in order to lower the storage requirements and delays in delivery. Moreover, the multimedia data is continuous and thus it heavily depends on time (time-dependent) of processing as well as of presentation. Additionally, Quality-of-Service (QoS) support can be provided when the whole server-side part works in the appropriate and reliable system. Till now only real-time systems can provide such a service of applications that allows for managing and controlling processes with a requested quality of the execution. So, the designed (and eventually implemented) audio-video converters have to work in real-time environment (RTE) or in other words in a real-time operating system (RTOS), and thus very complex algorithms of the audio- and video-processing have to be adapted to the chosen RTE.
Project manager:
Prof. i. R. Dr. Klaus Meyer-Wegener

Project participants:
Maciej Suchomski, M.Sc.

real-time; conversion; video; audio; multimedia database; MMDB; multimedia database management system; MMDBMS; media server; multimedia server; mms; format independence; QoS

Duration: 1.2.2002 - 30.4.2007

Mitwirkende Institutionen:
MMIS Group

Märcz, Andreas: Scheduling periodic media converters. In: WCET Analysis Workshop, Delft /NL. xx : xx, 2001.
Hamann, Claude-Joachim; Märcz, Andreas ; Meyer-Wegener, Klaus: Buffer Optimization in Realtime Media Servers Using Jitter-constrained Periodic Streams. Dresden : TU Dresden. 2001. - Internal report
Militzer, Michael ; Suchomski, Maciej ; Meyer-Wegener, Klaus: Improved p-domain rate control and perceived quality optimizations for MPEG-4 real-time video applications. In: Rowe, L. A. ; Vin, H. M. ; Plagemann, T. ; Shenoy, P. J. ; Smith, J. R. (Ed.) : Proceedings of the 11th ACM International Conference on Multimedia (ACM MM'03 Berkeley, California, USA 2.-8.11.2003). New York, NY, USA : ACM Press, 2003, pp 402-411. - ISBN 1-58113-722-2
Schmidt, Sven ; Märcz, Andreas ; Lehner, Wolfgang ; Suchomski, Maciej ; Meyer-Wegener, Klaus: Quality-of-Service Based Delivery of Multimedia Database Objects without Compromising Format Independence. In: Knowledge Systems Institute (Ed.) : Proceedings of the Ninth International Conference on Distributed Multimedia Systems (DMS Miami, Florida, USA 24. - 26.09.). 2003, pp 90-93.
Märcz, Andreas ; Meyer-Wegener, Klaus ; Suchomski, Maciej: Multimedia Conversion with the Focus on Continuous Media. In: van Bommel, Patrick (Ed.) : Transformation of Knowledge, Information and Data: Theory and Applications. London, U.K., Hershey, PA, USA : Information Science Publishing INFOSCI, 2004, pp 235-256. - ISBN 1-59140-527-0
Meyerhöfer, Marcus ; Meyer-Wegener, Klaus ; Suchomski, Maciej: Open and Reconfigurable Multimedia Server Architecture. In: Czeslaw, Danilowicz (Ed.) : Proc. 1st International Workshop on Multimedia Information Systems Technology (MMISTech'2004 in conjunction with the 4th National Conference Multimedia and Network Information Systems 2004 (MiSSI '04) Szklarska Poreba, Poland 17.09.2004). Wroclaw, Poland : Oficyna Wydawnizcza Politechniki Wroclawskiej, 2004, pp 213-222. - ISBN 83-7085-808-2
Militzer, Michael ; Suchomski, Maciej ; Meyer-Wegener, Klaus: LLV1: Layered Lossless Video Format Supporting Multimedia Servers During Realtime Delivery. In: Vetro, Anthony ; Chen, Chang Wen ; Kuo, C.-C. J. ; Zhang, Tong ; Tian, Qi ; Smith, John R. (Ed.) : Multimedia Systems and Applications VIII (SPIE Optics East 2005 Boston, Massachusetts, USA 24.-26.10.2005). 2005, pp 60151A. (Proc. SPIE Vol. 6015)
Suchomski, Maciej ; Meyer-Wegener, Klaus ; Militzer, Michael: RETAVIC: Using Meta-Data for Real-Time Video Encoding in Multimedia Servers. In: Feng, Wu-Chi ; Mayer-Patel, Ketan (Ed.) : Network and Operating Systems Support for Digital Audio and Video (NOSSDAV'05, Proc. Int. Workshop Stevenson, Washington, USA 13.-14.6.2005). New York, NY, USA : ACM Press, 2005, pp 81-86.
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