A multilevel unequal protection scheme for robust H.264/AVC video transmission over wireless channels

  • Authors:

  • Anuj Bhatnagar;Sunil Kumar;Aparna Janarthanan;Annamalai Annamalai, Jr.;Michael Medley;John Matyjas

  • Affiliations:

  • Electrical and Computer Engineering Department, San Diego State University, San Diego, CA;Electrical and Computer Engineering Department, San Diego State University, San Diego, CA;Electrical and Computer Engineering Department, San Diego State University, San Diego, CA;Electrical and Computer Engineering Department, Prairie View A&M University, Prairie View, Texas;Air Force Research Laboratory, Rome, NY;Air Force Research Laboratory, Rome, NY

  • Venue:
  • MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
  • Year:
  • 2009

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Abstract

We present a cross-layer and multilevel unequal error protection (UEP) approach for robust video transmission over noisy wireless channels. We combine the UEP schemes at the application layer (i.e., multi-level unequal importance of compressed H.264/AVC video data) and physical layer (multi-resolution asymmetric 8-PSK modulation). The proposed scheme multiplexes the video data by mapping it to the unequally protected asymmetric PSK signal constellation, such that the most significant bits have a lower probability of error than the least significant bits. This scheme provides a graceful degradation of reconstructed video data during short deep fades in a point to point wireless communication system.