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Robust Video Streaming over VANET

Taghavi Nasrabadi, Afshin | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44645 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Ghanbari, Mohammad
  7. Abstract:
  8. In the recent years, emerging vehicular ad hoc networks offer a wide variety of applications, including safety, convenience and entertainment. One of the beneficial applications in these fields is video streaming. However, according to the features like high mobility and loss of links, establishment of video streaming which requires stringent Quality of Service is a daunting task. In this thesis, the goal is introducing approaches in two levels, one for resilient video coding and the other one for network routing. For resilient video coding, the concentration is on the scalable video coding, which supports various applications for users with different requirements. The introduced approach brings into play the Multiple Description Coding using Flexible Macroblock Ordering for each layer, which increases error resiliency. This method improves the PSNR up to 2 dB. Moreover, an error concealment method is proposed that inserts redundant motions vectors from base layer into enhancement layer to conceal the errors in thebase layer. In addition, two methods for calculating PSNR are investigated, and it has been demonstrated that using one of them is necessary in order to evaluate the quality of video in lossy channels. Using multipath routing besides Multiple Description Coding is very beneficial; therefore, a multipath routing protocol is introduced which applies multi-interface multi-channel for finding two pathsin spatial and frequency domain. The advantages of this protocol are the elimination of interference between two paths and taking into account the traffic situation of nodes, leading into the improvement of the packet delivery ratioup to 15 percent
  9. Keywords:
  10. Video Streaming ; Vehicular Ad Hoc Network (VANET) ; Multipath Routing ; Error Resilient ; Video Coding

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