In this work, the detector performance of a watermark-based error concealment (WEC) system proposed in C.B. Adsumilli is mathematically analyzed. The spread spectrum based WEC algorithm embeds a low resolution version of an image in itself during encoding. At the receiver, this embedded watermark is extracted and used as a reference to conceal the transmission losses in the reconstructed image. For the application of error concealment, the detector modelling varies from the conventional watermark detectors due to the fact that we use a full frame DCT to embed the watermark data and vary the strength of the watermark in accordance with the embedding coefficients to reduce the standard deviation of the resulting distribution. We further approximate the full frame DCT coefficients to follow a generalized Gaussian distribution (GGD) like in the case of modelling block-based DCT coefficients and consequently, we provide a comparison between the performance of this system and conventional block-based embedding strategies for various packet loss probabilities. Both analytical and simulation results show that our system of full frame DCT embedding is more effective for error concealment in detecting the embedded bits with lesser probability of error.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Detector performance analysis of watermark-based error concealment in image communications


    Contributors:
    Adsumilli, C.B. (author) / Mitra, S.K. (author) / Kim, Y.C. (author)


    Publication date :

    2005-01-01


    Size :

    309725 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Detector Performance Analysis of Watermark-Based Error Concealment in Image Communications

    Adsumilli, C. B. / Mitra, S. K. / Kim, Y. C. | British Library Conference Proceedings | 2005


    Hierarchical Image Analysis using Radon Transform: An Application to Error Concealment

    Colonnese, S. / Panci, G. / Sansone, C. et al. | British Library Conference Proceedings | 2005


    Hierarchical image analysis using Radon transform: an application to error concealment

    Colonnese, S. / Panci, G. / Sansone, C. et al. | IEEE | 2005


    Error Concealment for Motion JPEG2000

    Atzori, L. / Bilgin, A. / Marcellin, M. W. | British Library Conference Proceedings | 2005


    Novel Error Concealment Algorithm for Image Transmission in JPEG2000

    Jieyu, L. / Guizhong, L. / Long, L. | British Library Online Contents | 2004