Real-time video streaming exploiting the late-arrival packets

For real-time video applications, such as video telephony service, the allowed maximum end-to-end transmission delay is usually fixed. The packets arriving at the destination out of the maximum end-to-end delay are treated as late-arrival packets, and these packets are discarded in traditional video transmission systems. In this paper, in order to improve the system performance, we propose to exploit these packets to update the decoder reference buffer. Two schemes are proposed to exploit the late-arrival packets, one scheme is to use sliding-window updating, where the updating window is moving; another scheme is to use fixed-window update together with systematic Reed-Solomon code. The effectiveness of the two schemes are validated by simulation results without adding extra delay. It is found that in both schemes, the updating window size plays an important role on the system performance.