The embedded codestream structures, associated with a variety of progressive image compression methods, suffer from severe error sensitivity when transmitted over wireless channels. In addition to employing forward error correction (FEC) codes, joint source-channel coding (JSCC) is a typical approach to combat the significant quality degradation. In this paper, a joint source-channel decoding (JSCD) method is designed when transmitting the JPEG2000 codestream over uncorrelated flat fading channels using low-density parity-check (LDPC) codes. Error resilience modes implemented in the JPEG2000 codec makes it possible to provide new messages as feedback to the channel decoder. Thus, the log-domain sum-product decoding procedure for LDPC codes is updated during each iteration according to the feedback information from the JPEG2000 decoder. Two adaptive modification algorithms are proposed to update the log-likelihood ratio (LLR) of the bit nodes at the receiver with and without channel side information (CSI), respectively. Simulation results show that the joint source-channel decoding methods not only improve the quality of the reconstructed image greatly but also reduce the number of iterations significantly.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Joint source-channel decoding for JPEG2000 codestream transmission over flat fading channels


    Beteiligte:
    Weiliang Liu, (Autor:in) / Daut, D.G. (Autor:in)


    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    161392 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Joint Source-Channel Decoding for JPEG2000 Codestream Transmission over Flat Fading Channels

    Liu, W. / Daut, D. G. | British Library Conference Proceedings | 2005


    Transmission of JPEG2000 code-streams over mobile radio channels

    Natu, A. / Fresia, M. / Lavagetto, F. | IEEE | 2005


    Transmission of JPEG2000 Code-Streams over Mobile Radio Channels

    Fresia, A. N. M. / Lavagetto, F. | British Library Conference Proceedings | 2005


    Modeling, capacity, and joint source/channel coding for Rayleigh fading channels

    Wang,H.S. / Moayeri,N. / The Chinese Univ.of Hong Kong,CN et al. | Kraftfahrwesen | 1993


    Unequal error protection and progressive decoding for JPEG2000

    Lingling Pu, / Marcellin, M.W. / Vasic, B. et al. | IEEE | 2005