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inria-00629001, version 1

Lossy Compression of Distributed Sparse Sources: a Practical Scheme

Giulio Coluccia 1, Enrico Magli 1, Aline Roumy () 2, Velotiaray Toto-Zarasoa () a2

2011 European Signal Processing Conference (EUSIPCO‐2011) (2011)

Résumé : A new lossy compression scheme for distributed and sparse sources under a low complexity encoding con- straint is proposed. This architecture is able to exploit both intra- and inter-signal correlations typical of sig- nals monitored, for example, by a wireless sensor net- work. In order to meet the low complexity constraint, the encoding stage is performed by a lossy distributed compressed sensing (CS) algorithm. The novelty of the scheme consists in the combination of lossy distributed source coding (DSC) and CS. More precisely, we pro- pose a joint CS reconstruction lter, which exploits the knowledge of the side information to improve the qual- ity of both the dequantization and the CS reconstruction steps. The joint use of CS and DSC allows to achieve large bit-rate savings for the same quality with respect to the non-distributed CS scheme, e.g. up to 1.2 bps in the cases considered in this paper. Compared to the DSC scheme (without CS), we observe a gain increasing with the rate for the same mean square error.

  • Collaboration : PRIN project ARACHNE funded by the Italian Ministry of Education, University and Research
  • Domaine : Sciences de l'ingénieur/Traitement du signal et de l'image
    Informatique/Traitement du signal et de l'image
 
  • inria-00629001, version 1
  • oai:hal.inria.fr:inria-00629001
  • Contributeur : 
  • Soumis le : Mardi 4 Octobre 2011, 16:29:16
  • Dernière modification le : Jeudi 6 Octobre 2011, 15:26:23
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