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International Journal of Digital Multimedia Broadcasting
Volume 2009, Article ID 709813, 7 pages
http://dx.doi.org/10.1155/2009/709813
Research Article

An Adaptive Systematic Lossy Error Protection Scheme for Broadcast Applications Based on Frequency Filtering and Unequal Picture Protection

Département d'Opto-Acousto-Electronique, Institut d'Electronique de Microélectronique et de Nanotechnologie, UMR 8520, Université de Valenciennes, Le Mont Houy, 59313 Valenciennes, Cedex 9, France

Received 30 May 2008; Accepted 22 September 2008

Academic Editor: Susanna Spinsante

Copyright © 2009 Marie Ramon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Systematic lossy error protection (SLEP) is a robust error resilient mechanism based on principles of Wyner-Ziv (WZ) coding for video transmission over error-prone networks. In an SLEP scheme, the video bitstream is separated into two parts: a systematic part consisting of a video sequence transmitted without channel coding, and additional information consisting of a WZ supplementary stream. This paper presents an adaptive SLEP scheme in which the WZ stream is obtained by frequency filtering in the transform domain. Additionally, error resilience varies adaptively depending on the characteristics of compressed video. We show that the proposed SLEP architecture achieves graceful degradation of reconstructed video quality in the presence of increasing transmission errors. Moreover, it provides good performances in terms of error protection as well as reconstructed video quality if compared to solutions based on coarser quantization, while offering an interesting embedded scheme to apply digital video format conversion.