SoftCast: Clean-slate scalable wireless video
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tr2.pdf
Description
Accepted version
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746.57 KB
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Adobe PDF
Checksum (MD5)
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Author(s)
Jakubczak, Szymon Kazimierz
Katabi, Dina
Date Issued
February 2011
Journal
48th Annual Allerton Conference on Communication, Control, and Computing
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Jakubczak, Szymon, and Dina Katabi. “SoftCast: Clean-Slate Scalable Wireless Video.” 2010 48th Annual Allerton Conference on Communication, Control, and Computing (Allerton), September, 2010, Allerton, Illinois, IEEE, 2010: 530–33.
Version
Author's final manuscript
Abstract
Video broadcast and mobile video challenge the conventional wireless design. In broadcast and mobile scenarios the bit rate supported by the channel differs across receivers and varies quickly over time. The conventional design however forces the source to pick a single bit rate and degrades sharply when the channel cannot not support the chosen bit rate. This paper presents an overview of SoftCast, a clean-slate design for wireless video where the source transmits one video stream that each receiver decodes to a video quality commensurate with its specific instantaneous channel quality. To do so, SoftCast ensures the samples of the digital video signal transmitted on the channel are linearly related to the pixels' luminance. Thus, when channel noise perturbs the transmitted signal samples, the perturbation naturally translates into approximation in the original video pixels. Hence, a receiver with a good channel (low noise) obtains a high fidelity video, and a receiver with a bad channel (high noise) obtains a low fidelity video.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1109/allerton.2010.5706952
