Centralized Camera Selection in Free Viewpoint Video Systems

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Dr. Huszák Árpád
Department of Networked Systems and Services

In the history of television, the format remains the same from the very first televisions, until nowadays. We all watch the same edited, linear broadcast worldwide. To improve customer experience, some new technologies appeared, for example 3D television, or online nonlinear streams. But a bigger step, a great innovation is FVV (Free Viewpoint Video) technology, where the viewer can choose his own point of view in a defined environment, from any position or angle.

FVV means a lot of technological challenges for engineers because a free viewable picture has to be generated in real time from multiple cameras. For the flawless user experience, it has to be made on the client side of the network. Delivery of several cameras streams over the network causes huge traffic that must be optimized in order to avoid quality degradation due to congestion in the network. Network channels are limited, especially at wireless or mobile networks. Plus, mobile devices processing capabilities are limited too, therefore usually they cannot handle multiple streams simultaneously.

The topic of my thesis is the investigation of the optimization of network traffic. Basically, I investigate possibility of the centralized control of transmitted camera streams to reduce traffic in the network. The thesis summarize the theoretical knowledge needed for the research work, staring with the FVV technology. Based on the presented backgrounds, I have introduced several approaches that can minimize the network traffic. I introduced optimization algorithms and I made performance measurements. A traffic simulation software was created in order to evaluate the proposed methods. In the last section of my thesis, I analyse the results and conclude my work.


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