Performance improvement schemes for the transport of MPEG video streams over ATM networks.

Abstract

In this thesis, the use of three different schemes are studied to overcome the loss of information when transferring MPEG video sequences through ATM networks. In the first scheme, the prioritization algorithm assigns different priorities to the video stream based on the different types of video frames. In the second scheme, the use of dummy cells to replace lost ATM cells is investigated in the ATM adaptation layer. For this second scheme, different patterns to be used for the dummy cells are investigated. In the third scheme, the data size of slices and the number of slices are controlled based on the different types of video frames and the order in a group of pictures. The experimental results show the effectiveness of these schemes to overcome the loss of information when transferring packetized video streams. Statistics of the signal to noise ratio (SNR) for different cell loss ratios (CLR) in each case are presented. Statistics gathered from the three types of schemes can be applied in several ways for network design and operation.