Kernel-based MMSE Multimedia Signal Reconstruction and its Application to Spatial Error Concealment

Journal article


Publication Details

Author(s): Koloda J, Peinado A, Sánchez V
Journal: IEEE Transactions on Multimedia
Publication year: 2014
Volume: 16
Journal issue: 6
Pages range: 1729-1738
ISSN: 1520-9210
Language: English


Abstract

This paper proposes a novel approach for multimedia signal reconstruction based on kernel density estimation (KDE). We make use of a vector formalism in which vectors consist of a first subvector containing a set of missing samples and a second one containing a set of available context samples. The missing subvector is reconstructed by a minimum mean square error estimator which employs a probability density function (pdf) obtained by KDE. As in any kernel-based method, the main issue to deal with is the estimation of an appropriate kernel bandwidth. We propose an adaptive procedure for bandwidth estimation (BE) especially conceived for signal reconstruction. Thus, unlike general KDE or kernel-based regression, which try to obtain a general fit, the focus of this BE procedure is on the specific missing subvector. Also, in order to exploit local signal correlations, our BE proposal adopts a scaling approach in which the bandwidth is computed as the local covariance matrix scaled by two factors. These two scale factors are obtained by minimization of two different approximations to the reconstruction error. The resulting reconstruction methodology is tested on a spatial error concealment (EC) application in which intracoded images have been transmitted through an error prone channel. The experimental results show the superiority of the proposed approach over a wide range of existing EC techniques.


FAU Authors / FAU Editors

Koloda, Jan
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Koloda, J., Peinado, A., & Sánchez, V. (2014). Kernel-based MMSE Multimedia Signal Reconstruction and its Application to Spatial Error Concealment. IEEE Transactions on Multimedia, 16(6), 1729-1738. https://dx.doi.org/10.1109/TMM.2014.2330314

MLA:
Koloda, Jan, A.M. Peinado, and V. Sánchez. "Kernel-based MMSE Multimedia Signal Reconstruction and its Application to Spatial Error Concealment." IEEE Transactions on Multimedia 16.6 (2014): 1729-1738.

BibTeX: 

Last updated on 2019-20-04 at 18:38