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The impact of inter-layer network coding on the relative performance of MRC/MDC WiFi media delivery

Published: 01 June 2011 Publication History

Abstract

A primary challenge in multicasting video in a wireless LAN is to deal with the client diversity -- clients may have different channel characteristics and hence receive different numbers of transmissions from the AP. A promising approach to overcome this problem is to combine scalable video coding techniques such as MRC or MDC, which divide a video stream into multiple substreams, with inter-layer network coding. The fundamental challenge in such an approach is to determine the strategy of coding the packets across different layers that maximizes the number of decoded layers at all clients. In [7], the authors showed that inter-layer NC indeed helps the delivery of MRC coded media over the WiFi, and proposed how to efficiently search for the optimal coding strategies online.
In this paper, we study (1) how NC can help with WiFi delivery of MDC media, and (2) in particular, due to the different decoding requirements of MDC from MRC, whether WiFi delivery of MDC media can benefit more from NC compared to that of MRC media. Our simulation results are somewhat surprising. Even though MDC is generally shown to outperform MRC in lossy channels, most of the benefit of MDC over MRC is lost after applying NC to both schemes.

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Cited By

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  • (2014)Multiple Description CodingAcademic Press Library in signal Processing - Image and Video Compression and Multimedia10.1016/B978-0-12-420149-1.00008-9(251-294)Online publication date: 2014
  • (2011)Multicasting MDC videos to receivers with different screen resolutionACM SIGMETRICS Performance Evaluation Review10.1145/2160803.216087839:3(122-124)Online publication date: 21-Dec-2011

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  1. The impact of inter-layer network coding on the relative performance of MRC/MDC WiFi media delivery

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      cover image ACM Conferences
      NOSSDAV '11: Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video
      June 2011
      138 pages
      ISBN:9781450307772
      DOI:10.1145/1989240
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      Published: 01 June 2011

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      Author Tags

      1. mdc
      2. mrc
      3. network coding
      4. streaming media
      5. wifi

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      • (2014)Multiple Description CodingAcademic Press Library in signal Processing - Image and Video Compression and Multimedia10.1016/B978-0-12-420149-1.00008-9(251-294)Online publication date: 2014
      • (2011)Multicasting MDC videos to receivers with different screen resolutionACM SIGMETRICS Performance Evaluation Review10.1145/2160803.216087839:3(122-124)Online publication date: 21-Dec-2011

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