MPEG-2 Video Services over Packet Networks: Joint Effect of Encoding Rate and Data Loss on User-Oriented QoS

We address the problem of video quality prediction and control for high resolution video transmitted over lossy packet networks. We analyze how the user-perceived quality is related to the average encoding bitrate for VBR MPEG2 video. We then show why simple distortion metrics (e.g., PSNR) may lead to inconsistent interpretations. Furthermore, for a given coder setup, we analyze the effect of packet loss on the user-level quality. We then demonstrate that, when jointly studying the impact of coding bit rate and packet loss, the reachable quality is upperbound and exhibits one optimal coding rate for a given packet loss ratio.

[1]  Gunnar Karlsson,et al.  Asynchronous transfer of video , 1996, IEEE Commun. Mag..

[2]  Masayuki Murata,et al.  On flow aggregation for multicast video transport , 1998, 1998 Sixth International Workshop on Quality of Service (IWQoS'98) (Cat. No.98EX136).

[3]  Olivier Verscheure,et al.  Perceptual quality measure using a spatiotemporal model of the human visual system , 1996, Electronic Imaging.

[4]  James Roberts,et al.  Network Performance Considerations in the Design of a VBR Codec , 1991 .

[5]  Arun N. Netravali,et al.  Digital Video: An introduction to MPEG-2 , 1996 .

[6]  S. Comes.  Les traitements perceptifs d'images numérisées , 1993 .

[7]  C. van den Branden Lambrecht.  A working spatio-temporal model of the human visual system for image restoration and quality assessment applications , 1996, 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings.