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SoftCast: clean-slate scalable wireless video

Published: 20 September 2010 Publication History

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 support the chosen bit rate.
This paper presents 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.

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      cover image ACM Conferences
      S3 '10: Proceedings of the 2010 ACM workshop on Wireless of the students, by the students, for the students
      September 2010
      70 pages
      ISBN:9781450301442
      DOI:10.1145/1860039
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      Published: 20 September 2010

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      Author Tags

      1. joint source-channel coding
      2. scalable video communications
      3. wireless networks

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      • (2020)Channel Impulsive Noise Mitigation for Linear Video Coding SchemesIEEE Transactions on Circuits and Systems for Video Technology10.1109/TCSVT.2019.293745130:9(3196-3209)Online publication date: 1-Sep-2020
      • (2019)Deep Joint Source-Channel Coding for Wireless Image TransmissionIEEE Transactions on Cognitive Communications and Networking10.1109/TCCN.2019.29193005:3(567-579)Online publication date: Sep-2019
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      • (2019)Channel Impulsive Noise Mitigation for Linear Video Coding SchemesICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)10.1109/ICASSP.2019.8682699(2347-2351)Online publication date: May-2019
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