Joint source-channel coding and power adaptation for energy efficient wireless video communications

Fan Zhai*, Yiftach Eisenberg, Thrasyvoulos N. Pappas, Randall Berry, Aggelos K. Katsaggelos

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We consider efficiently transmitting video over a hybrid wireless/wire-line network by optimally allocating resources across multiple protocol layers. Specifically, we present a framework of joint source-channel coding and power adaptation, where error resilient source coding, channel coding, and transmission power adaptation are jointly designed to optimize video quality given constraints on the total transmission energy and delay for each video frame. In particular, we consider the combination of two types of channel coding - inter-packet coding (at the transport layer) to provide protection against packet dropping in the wire-line network and intra-packet coding (at the link layer) to provide protection against bit errors in the wireless link. In both cases, we allow the coding rate to be adaptive to provide unequal error protection at both the packet and frame level. In addition to both types of channel coding, we also compensate for channel errors by adapting the transmission power used to send each packet. An efficient algorithm based on Lagrangian relaxation and the method of alternating variables is proposed to solve the resulting optimization problem. Simulation results are shown to illustrate the advantages of joint optimization across multiple layers.

Original languageEnglish (US)
Pages (from-to)371-387
Number of pages17
JournalSignal Processing: Image Communication
Volume20
Issue number4
DOIs
StatePublished - Apr 2005

Keywords

  • Cross layer
  • Error concealment
  • Error resilience
  • Multimedia streaming
  • Product FEC
  • QoS
  • Unequal error protection (UEP)

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering

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