Multi-object video error recovery over wireless networks

Abstract

In this paper, we investigate the use of a FEC-based error control mechanism for loss protection in wireless MO video systems. The Multi-Object video coding schemes enhances the traditional concept of video sequence and proposes a synchronized set of video objects (VO) organized in a flexible way. According to this new paradigm, wireless MO video delivery becomes one of the greatest challenges in the near future. Unfortunately, wireless networks are characterized by large number of packet losses because of fading communication channels. Thus, loss recovery mechanisms must be added to prevent video degradation. In this paper, we propose a video object-based unequal error protection mechanism, which allocate an optimal FEC redundancy ratio to each object. This FEC allocation is done according to video objects relevance, and the wireless network packet loss rate. This wireless packet loss rate is modeled using a Gilbert-Elliot model. Our results demonstrate that video quality degradation can be significantly reduced.