A Robust Error Resilience Scheme for Wireless Video Transmission

摘要

With the development of communication technology, wireless video transmission is welcomed in wider field. However, the quality of received video is still unsatisfied. This may be caused by wireless channel fading, Doppler phenomenon, limited bandwidth, Internet congestion, which may lead to bit errors and packet loss. In order to deal with bit errors and packet loss in the transmission and enhance the received video quality, a robust error resilience scheme of video transmission over wireless networks, which is based on Rate Compatible Punctured Convolutional (RCPC) and Forward Error Correction (FEC), is proposed in this paper. In the scheme, the RTCP feedback information to the sending end which carries bit error rate, network packet loss rate and transmission delay, is used to adjust the RCPC and FEC parity encoding. At the same time the packet video data is packed into the same size. The experiment shows that this scheme can provide more satisfied video playback quality in 3G wireless networks with different bit error rate and packet loss rate, and also can improve overall network utilization efficiency, end to end delay, and smaller packet loss rate.