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Communication of degradable signals in networks: An approach based on diversity coding and routing.

机译:网络中可降解信号的通信:一种基于分集编码和路由的方法。

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摘要

This work opens up a new line of enquiry into networked signal communications, which we call joint network-source coding (JNSC). JNSC puts the research on network coding in a rate-distortion perspective and can be con sidered as the extension of network coding to communication of degradable signals. We show that higher overall bandwidth economy can be achieved by allowing network clients to reconstruct a source signal at different fidelities, rather than insisting on an identical reconstruction at all sinks as in lossless network coding. We then introduce a constructive algorithmic approach to solving the JNSC problem via collaborative multiple description diversity coding and diversity routing. We also study information-theoretical limiting behaviors of the proposed design. Unlike existing works on network coding, our JNSC approach respects the existing network hardware design and protocols. Considering that the bulk of network traffic is for signal communications with fidelity (e.g., multimedia streaming), efficient solutions to JNSC problem, such as those proposed by this thesis, have the potential to improve the quality of network services.
机译:这项工作为网络信号通信开辟了一条新的查询线,我们称其为网络源代码联合编码(JNSC)。 JNSC从速率失真的角度对网络编码进行了研究,可以认为它是网络编码对可降解信号通信的扩展。我们表明,通过允许网络客户端以不同的保真度重构源信号,而不是像在无损网络编码中那样坚持在所有接收器处进行相同的重构,可以实现更高的整体带宽经济性。然后,我们介绍一种通过协作的多描述分集编码和分集路由来解决JNSC问题的建设性算法。我们还研究了提出的设计的信息理论限制行为。与现有的网络编码工作不同,我们的JNSC方法尊重现有的网络硬件设计和协议。考虑到大量的网络流量是用于保真度高的信号通信(例如,多媒体流),因此针对JNSC问题的有效解决方案(如本论文提出的解决方案)具有改善网络服务质量的潜力。

著录项

  • 作者

    Sarshar, Nima.;

  • 作者单位

    McMaster University (Canada).;

  • 授予单位 McMaster University (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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