@InProceedings{Schojer2002, author = {Schojer, Peter and Böszörmenyi, Laszlo and Hellwagner, Hermann}, booktitle = {Distributed and parallel systems: cluster and grid computing. Proceedings of International Conference on Distributed and Parallel Systems (DAPSYS 02), Linz, Austria.}, title = {An Adaptive MPEG-4 Proxy Cache}, year = {2002}, address = {Boston [u. a.]}, editor = {Kascuk, Péter and Kranzlmüller, Dieter and Németh, Zsolt and Volkert, Jens}, month = aug, pages = {149-156}, publisher = {Kluwer Academic Publishers}, series = {The Kluwer international series in engineering and computer science}, abstract = {Multimedia is gaining ever more importance on the Internet. This increases the need for intelligent and efficient video caches. Typical Web proxies were not designed to efficiently support the caching of videos. A promising approach to improve caching efficiency is to adapt videos. With the availability of MPEG-4 it is possible to develop a standard compliant proxy that allows fast and efficient adaptation. We propose a modular design for an adaptive MPEG-4 video proxy that supports efficient full and partial video caching in combination with filtering options that are driven by the terminal capabilities of the client. We use the native scalability operations provided by MPEG-4 and use the emerging MPEG-7 standard to describe the scalability options for a video. The proxy parses the MPEG-7 description and decides, based on this description and the terminal capabilities of the client, which adaptation step to choose. Simple MPEG-4 audio-visual streams are supported by filter operations in the compressed domain that realize several temporal scaling algorithms and color reduction. In this paper, we will restrict ourselves to full video caching. The combination of adaptation with MPEG-4, MPEG-7 and client terminal capabilities is to the best of our knowledge unique and will increase the quality of service for end users.}, issn = {1-4020-7209-0}, keywords = {adaptation, MPEG-4, MPEG-7, adaptive proxy, caching}, language = {EN}, pdf = {https://www.itec.aau.at/bib/files/An Adaptive MPEG-4 Proxy Cache.pdf}, talktype = {none} }