Reference equipment of cross-layer control for live video transmission on various physical links

The purpose of this study is to verify our live video transmission specifications in a real environment. We implemented a high-definition video transmitter that adjusts the video encoding rate according to the physical link status using a cross-layer rate control scheme. The transmitter will be used as reference equipment to practically evaluate the many simulated algorithms, because rate-control algorithms can be implemented in software regardless of the kind of physical layer. First, we explain the transmitter architecture, and then, report on our evaluation of the effectiveness of our cross-layer rate-control algorithm in comparison with a single application layer rate-control algorithm. We verified our algorithm can more quickly and accurately follow the link status than the single application layer rate-control algorithm using the implemented transmitter. Furthermore, we introduce an example in which the equipment can be easily used for other physical links because the reference equipment architecture abstracts the physical layer.