Elements of information theory
Elements of information theory
FOCS '02 Proceedings of the 43rd Symposium on Foundations of Computer Science
Fundamentals of wireless communication
Fundamentals of wireless communication
IEEE/ACM Transactions on Networking (TON) - Special issue on networking and information theory
PPR: partial packet recovery for wireless networks
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Cross-layer wireless bit rate adaptation
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
Design and implementation of an "approximate" communication system for wireless media applications
Proceedings of the ACM SIGCOMM 2010 conference
Low-complexity video coding for receiver-driven layered multicast
IEEE Journal on Selected Areas in Communications
A digital fountain approach to asynchronous reliable multicast
IEEE Journal on Selected Areas in Communications
An image multiresolution representation for lossless and lossy compression
IEEE Transactions on Image Processing
IEEE Transactions on Circuits and Systems for Video Technology
Multicast and unicast real-time video streaming over wireless LANs
IEEE Transactions on Circuits and Systems for Video Technology
MuVi: a multicast video delivery scheme for 4g cellular networks
Proceedings of the 18th annual international conference on Mobile computing and networking
ParCast: soft video delivery in MIMO-OFDM WLANs
Proceedings of the 18th annual international conference on Mobile computing and networking
An information-aware QoE-centric mobile video cache
Proceedings of the 19th annual international conference on Mobile computing & networking
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Video streaming performance on wireless networks is choppy. The culprit is the unpredictable wireless medium, whose fluctuations results in fluctuating throughput and bit errors. Current video codecs are not equipped to handle such variations since they exhibit an all or nothing behavior. If the channel is strong and above a threshold, the video stream gets decoded perfectly. If not, typically nothing gets decoded. Thus, there is no graceful degradation with wireless conditions. In this paper, we present a new technique FlexCast, that delivers a video reconstruction whose quality automatically varies with the channel conditions. The key idea is a novel joint-source channel code, that allows the sender to continuously transmit video bits, and the receiver to decode a video quality corresponding to the number of bits it receives and the instantaneous wireless channel quality. We show via experimental evaluation that name performs almost as well as the optimal scheme, and outperforms the state of the art graceful video delivery systems by nearly 6dB PSNR.