Statistical characterization of MPEG VBR video at the slice layer

Michael R. Izquierdo; Douglas S. Reeves

doi:10.1117/12.206053

14 March 1995 Statistical characterization of MPEG VBR video at the slice layer

Michael R. Izquierdo, Douglas S. Reeves

Proceedings Volume 2417, Multimedia Computing and Networking 1995; (1995) https://doi.org/10.1117/12.206053
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

In this paper, we statistically characterized four VBR encoded video sequences, containing I/B/P frames, at the Slice layer with the goal of developing an accurate source model to better understand the bit-rate behavior of these sources. We presented the cells/slice distributions and showed that it is 'heavy tailed' and fits the Pareto distribution better than Gamma. We showed that an 8-state Markov Chain fits the cells/slice distribution well, reaching steady state after 37 to 80 transitions (2 to 5 frames). We also showed that the autocorrelation function is quasi-periodic which is mostly due to the frame sequence pattern rather than spatial content. We discussed the impact to I/B/P sequences on multiplexing and dynamic bandwidth allocation and proposed a multiplexing method called Time Shifted Multiplexing (TSM); whereby, the multiplexer attempts to overlap I and P frames of one video stream with B frames of another. This tends to reduce both Peak-to-Mean-Ratio and Coefficient-of-Variation of the multiplexed output stream. We showed that coefficient-of-variation reduced in half and bandwidth requirements reduced by 41% using TSM.

Citation Download Citation

Michael R. Izquierdo and Douglas S. Reeves "Statistical characterization of MPEG VBR video at the slice layer", Proc. SPIE 2417, Multimedia Computing and Networking 1995, (14 March 1995); https://doi.org/10.1117/12.206053

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