Cooperative source and channel coding for wireless multimedia communications

Hoi Yin Shutoy, Deniz Gündüz, Elza Erkip, Yao Wang

Research output: Contribution to journalArticle

Abstract

Past work on cooperative communications has indicated substantial improvements in channel reliability through cooperative transmission strategies. To exploit cooperation benefits for multimedia transmission over slow fading channels, we propose to jointly allocate bits among source coding, channel coding and cooperation to minimize the expected distortion of the reconstructed signal at the receiver. Recognizing that, not all source bits are equally important in terms of the end-to-end distortion, we further propose to protect the more important bits through user cooperation. We compare four modes of transmission that differ in their compression and error protection strategies (single layer or multiple layer source coding with unequal error protection, with versus without cooperation). Our study includes an i.i.d. Gaussian source as well as a video source employing an H.263+ codec. We present an information theoretic analysis for the Gaussian source to investigate the effects of the modulation scheme, bandwidth ratio (number of channel uses per source sample), and average link signal-to-noise ratios on the end-to-end distortion of the four modes studied. The information theoretic observations are validated using practical channel coding simulations. Our study for video considers error propagation in decoded video due to temporal prediction and jointly optimizes a source coding parameter that controls error propagation, in addition to bits for source coding, channel coding and cooperation. The results show that cooperation can significantly reduce the expected end-to-end distortion for both types of source and that layered cooperation provides further improvements and extends the benefits to a wider range of channel qualities.

Original languageEnglish (US)
Pages (from-to)295-307
Number of pages13
JournalIEEE Journal on Selected Topics in Signal Processing
Volume1
Issue number2
DOIs
StatePublished - Aug 2007

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Channel coding
Communication
Cooperative communication
Information analysis
Fading channels
Telecommunication links
Signal to noise ratio
Modulation
Bandwidth

Keywords

  • Joint source channel coding
  • Layered source coding
  • Unequal error protection
  • User cooperation
  • Wireless video

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Cooperative source and channel coding for wireless multimedia communications. / Shutoy, Hoi Yin; Gündüz, Deniz; Erkip, Elza; Wang, Yao.

In: IEEE Journal on Selected Topics in Signal Processing, Vol. 1, No. 2, 08.2007, p. 295-307.

Research output: Contribution to journalArticle

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