MPEG: a video compression standard for multimedia applications
Communications of the ACM - Special issue on digital multimedia systems
Elements of information theory
Elements of information theory
A guide to data compression methods
A guide to data compression methods
Digital Image Compression Techniques
Digital Image Compression Techniques
OFDM Wireless LANs: A Theoretical and Practical Guide
OFDM Wireless LANs: A Theoretical and Practical Guide
H.264 layered coded video over wireless networks: channel coding and modulation constraints
EURASIP Journal on Applied Signal Processing
Layered video transmission on adaptive OFDM wireless systems
EURASIP Journal on Applied Signal Processing
Efficient channel-aware rate adaptation in dynamic environments
Proceedings of the 6th international conference on Mobile systems, applications, and services
Proceedings of the 14th ACM international conference on Mobile computing and networking
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
Hybrid digital-analog (HDA) joint source-channel codes for broadcasting and robust communications
IEEE Transactions on Information Theory
Hybrid Digital–Analog Source–Channel Coding for Bandwidth Compression/Expansion
IEEE Transactions on Information Theory
Diversity Embedded Space–Time Codes
IEEE Transactions on Information Theory
The source-channel separation theorem revisited
IEEE Transactions on Information Theory
Three-dimensional subband coding of video
IEEE Transactions on Image Processing
IEEE Transactions on Circuits and Systems for Video Technology
D-cast: DSC based soft mobile video broadcast
Proceedings of the 10th International Conference on Mobile and Ubiquitous Multimedia
RPT: re-architecting loss protection for content-aware networks
NSDI'12 Proceedings of the 9th USENIX conference on Networked Systems Design and Implementation
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
LEAD: leveraging protocol signatures for improving wireless link performance
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
Understanding user behavior at scale in a mobile video chat application
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
An information-aware QoE-centric mobile video cache
Proceedings of the 19th annual international conference on Mobile computing & networking
Cactus: a hybrid digital-analog wireless video communication system
Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems
A wireless application overlay for ubiquitous mobile multimedia sensing and interaction
Proceedings of the 5th ACM Multimedia Systems Conference
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Today's mobile video suffers from two limitations: 1) it cannot reduce bandwidth consumption by leveraging wireless broadcast to multicast popular content to interested receivers, and 2) it lacks robustness to wireless interference and errors. This paper presents SoftCast, a cross-layer design for mobile video that addresses both limitations. To do so, SoftCast changes the network stack to act like a linear transform. As a result, the transmitted video signal becomes linearly related to the pixels' luminance. Thus, when noise perturbs the transmitted signal samples, the perturbation naturally translates into approximation in the original video pixels. This enables a video source to multicast a single stream that each receiver decodes to a video quality commensurate with its channel quality. It also increases robustness to interference and errors which now reduce the sharpness of the received pixels but do not cause the video to glitch or stall. We have implemented SoftCast and evaluated it in a testbed of software radios. Our results show that it improves the average video quality for multicast users by 5.5dB, eliminates video glitches caused by mobility, and increases robustness to packet loss by an order of magnitude.