A design of bandwidth adaptive multimedia gateway for scalable video coding

Delivering multimedia streaming on Internet remains several limitations, such as bandwidth fluctuations and network conjunction. We present a multimedia gateway design including dynamic bandwidth estimation, SVC extractor and buffer management to resolve the limitations. The dynamic bandwidth estimation not only selects the appropriate SVC sub-stream, but also measures the change of bandwidth and packet loss with multimedia transmission. When the network congestion happened, the buffer management picks the important one from all packets. Weighted Random Early Detection (WRED) is used to increase peak signal-to-noise ratio (PSNR) of video stream. Comparing four WRED schemes, we figure out that “Disjoint” setting can get higher average of PSNR. The result shows that PSNR is elevated in the system proposed by us.