Error Concealment Techniques in H.264/AVC for Wireless Video Transmission in Mobile Networks

Nowadays audio-visual and multimedia services are seen as important sources of the traffic within mobile networks. An important characteristic of such networks is that they cannot provide a guaranteed quality of service (QoS) due to issues like interfering traffic, signal to noise ratio fluctuations etc. One of the limitations within the mobile networks is the low transmission bit rate which demands the reduction of the video resolution and an efficient video compression technique such as H.264/AVC [8] standard, which provides a high compression gain. There is however a concern regarding video transmission over RF, i.e. the presence of packet loss and jitter (packet delay-variance). In this paper we analyze the error concealment algorithms proposed in the H.264 standard. Then this strategy is modified to suit our application in a wireless environment. Subjective quality of the error concealed images is analyzed based on PSNR, MSE and SSIM. Comparative conclusions are drawn based on the effect of the amount of packet loss or jitter on a particular Error Concealment technique at the decoder.