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Proceedings Paper

Statistical characterization of MPEG VBR video at the slice layer
Author(s): Michael R. Izquierdo; Douglas S. Reeves
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Paper 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.

Paper Details

Date Published: 14 March 1995
PDF: 12 pages
Proc. SPIE 2417, Multimedia Computing and Networking 1995, (14 March 1995); doi: 10.1117/12.206053
Show Author Affiliations
Michael R. Izquierdo, IBM Corp. (United States)
Douglas S. Reeves, North Carolina State Univ. (United States)

Published in SPIE Proceedings Vol. 2417:
Multimedia Computing and Networking 1995
Arturo A. Rodriguez; Jacek Maitan, Editor(s)

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