Abstract
For reducing cost of wireless gadgets and taking advantage of mobility offered by wireless network, the 802.11 wireless local area networks (WLANs) has become popular in recent years. Although current WLANs are predominantly used for data transfer, the higher bandwidth provided by new WLAN technologies will lead to increasing use for multimedia transmissions. But to transmit a video stream over the WLANs poses several challenges, including bandwidth variation and data loss. In order to provide a reliable and efficient transmission of compressed video over WLANs, we propose to employ Fine-Granular-Scalability (FGS) coding for the compression of video data. The video coded with FGS can provide a continuous video quality adapting to bandwidth variations. Furthermore, we propose a novel strategy which incorporates with unequal error protection for packets of FGS enhancement layer and post-processing for decoded video data. Usually the compressed data of FGS enhancement layer in each packet has different priority. We protect part of data with higher priority, and recover the most important information when a packet is lost during transmission. From the simulation results, we find that the proposed error protection strategies can improve the error resilience and enhance the video quality under the packet loss.