Joint Wyner-Ziv/dirty-paper coding by modulo-lattice modulation
IEEE Transactions on Information Theory
Sora: high-performance software radio using general-purpose multi-core processors
Communications of the ACM
Joint source channel coding with side information using hybrid digital analog codes
IEEE Transactions on Information Theory
A cross-layer design for scalable mobile video
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
Design and performance of VQ-based hybrid digital-analog joint source-channel codes
IEEE Transactions on Information Theory
Theoretical limitations on the transmission of data from analog sources
IEEE Transactions on Information Theory
To code, or not to code: lossy source-channel communication revisited
IEEE Transactions on Information Theory
Motion-compensated 3-D subband coding of video
IEEE Transactions on Image Processing
Image Denoising by Sparse 3-D Transform-Domain Collaborative Filtering
IEEE Transactions on Image Processing
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
Barbell-Lifting Based 3-D Wavelet Coding Scheme
IEEE Transactions on Circuits and Systems for Video Technology
Analog Matching of Colored Sources to Colored Channels
IEEE Transactions on Information Theory
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This paper challenges the conventional wisdom that video redundancy should be removed as much as possible for efficient communications. We discover that, by keeping spatial redundancy at the sender and properly utilizing it at the receiver, we can build a more robust and even more efficient wireless video communication system than existing ones. In the proposed framework, inter-frame (temporal) redundancy in video is removed at the encoder, but intra-frame (spatial) redundancy is retained. In doing so, pixel values after a transform-domain scaling are directly transmitted with amplitude modulation. At the receiver, spatial redundancy is utilized by image denoising. Note that denoising in our decoder is not a post-processing, but have to be immediately performed on channel output. We implement the video communication system called Cactus on SORA platform, and make the denoising processing real-time through GPU implementation. Cactus is evaluated in 802.11a/g WLAN environment. On average, Cactus outperforms SoftCast by 4.7 dB in video PSNR and is robust to packet losses.