Effects of frame rate, frame size and MPEG2 compression on the perceived compressed video quality transmitted over lossy IP networks

The purpose of this paper is to analyze the relationship between viewer-perceived quality and encoding schemes. The encoding schemes depend on transmission bit-rate, on MPEG compression depth, on frame size and on frame rate in a constant bit-rate (CBR) video transmission of a MPEG2 video sequence. The compressed video sequence is transmitted over a lossy communication network with quality of service (QoS) and a certain IP loss model. On the end-user side, viewer-perceived quality depends on changes in the network conditions and on video complexity. We demonstrate that, when jointly considering the impact of coding bit rate, packet loss and video complexity, there is an optimal encoding scheme, which depends on the video content. This optimal encoding scheme maximizes the viewer-perceived quality.