Precoded EWF codes for unequal error protection of scalable video

  • Authors:

  • Dejan Vukobratović;Vladimir Stanković;Lina Stanković;Dino Sejdinović

  • Affiliations:

  • University of Strathclyde, Glasgow, UK;University of Strathclyde, Glasgow, UK;University of Strathclyde, Glasgow, UK;University of Bristol, Bristol, UK

  • Venue:
  • Proceedings of the 5th International ICST Mobile Multimedia Communications Conference
  • Year:
  • 2009

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Abstract

Rateless codes are forward error correcting (FEC) codes of linear encoding-decoding complexity and asymptotically capacity-approaching performance over erasure channels with any erasure statistics. They have been recently recognized as a simple and efficient solution for packetized video transmission over networks with packet erasures. However, to adapt the error correcting capabilities of rateless codes to the unequal importance of scalable video, unequal error protection (UEP) rateless codes are proposed as an alternative to standard rateless codes. In this paper, we extend our recent work on UEP rateless codes called Expanding Window Fountain (EWF) codes in order to improve their UEP performance. We investigate the design of precoded EWF codes, where precoding is done using high-rate Low-Density Parity-Check (LDPC) codes, following the similar reasoning applied in the design of Raptor codes. The obtained results are presented in the context of UEP error correcting performance of EWF codes and applied on scalable video coded (SVC) transmission over erasure networks.