ACM Transactions on Computer Systems (TOCS)
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
Hourglass multimedia content and service composition framework for smart room environments
Pervasive and Mobile Computing
Architecture for dynamic and fair distribution of bandwidth
International Journal of Network Management
Applying Coordination for Service Adaptation in Mobile Computing
IEEE Internet Computing
System support for bandwidth management and content adaptation in internet applications
OSDI'00 Proceedings of the 4th conference on Symposium on Operating System Design & Implementation - Volume 4
Dynamic algorithms to provide a robust and scalable overlay routing service
ICOIN'06 Proceedings of the 2006 international conference on Information Networking: advances in Data Communications and Wireless Networks
Dynamic rate shaping of compressed digital video
IEEE Transactions on Multimedia
End-to-end quality of service for high-end applications
Computer Communications
Architectures for MPEG compressed bitstream scaling
IEEE Transactions on Circuits and Systems for Video Technology
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Accessing multimedia services via fixed and wireless networks has become common practice. These services are typically much more sensitive to packet loss, delay and/or congestion than traditional services. In particular, multimedia data is often time critical and, as a result, network issues are not well tolerated and significantly deteriorate the user's Quality of Experience QoE. Therefore, the authors propose a QoE optimization platform that is able to mitigate problems that might occur at any location in the delivery path from service provider to customer. More specifically, the distributed architecture supports overlay routing to circumvent erratic parts of the network core. In addition, it comprises proxy components that realize last mile optimization through automatic bandwidth management and the application of processing on multimedia flows. This paper introduces a trans-coding service for this proxy component which enables the transformation of H.264/AVC video flows to an arbitrary bitrate. Through representative experimental results, the authors illustrate how this addition enhances the QoE optimization capabilities of the proposed platform by allowing the proxy component to compute more flexible and effective bandwidth distributions.