JOURNAL OF MULTIMEDIA (JMM)
ISSN : 1796-2048
Volume : 2    Issue : 3    Date : June 2007

Towards A Multi-Terminal Video Compression Algorithm By Integrating Distributed Source
Coding With Geometrical Constraints
Bi Song, Ertem Tuncel, and Amit Roy-Chowdhury
Page(s): 9-16
Full Text:
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Abstract
In this paper, we present a framework for multiterminal video compression (MTVC) that exploits the
geometric constraints between cameras with overlapping fields of view, and then uses distributed
source coding on corresponding points in two or more views. There are two main parts of the paper
- a Distributed Motion Estimation (DME) algorithm and a Distributed Source Coding (DSC)
algorithm. The novelty of the approach lies in the integration of these two parts. The overall
algorithm is developed such that future improvements in either of the two parts can be integrated
into it. We start by describing the algorithm for obtaining corresponding points followed by the
distributed coding strategy. Our experiments provide a benchmark on the upper bound of the gain
obtained through distributed coding of a pair of video sequences, as opposed to coding each of
them separately. We also show results on a reallife face video sequence obtained by a pair of
overlapping cameras. Through this experimental analysis, we show that at low bit-rates MTVC can
achieve very significant savings.

Index Terms
Video compression, Distributed source coding, Distributed Motion Estimation, Performance
evaluation