Data supervision for adaptively transcoded video surveillance over wireless links

This paper describes a solution for on-the-fly adapting the parameters of a video surveillance streams to system varying conditions, both in terms of data to be transmitted (number of streams to be sent) and of transmission conditions (quality of the available wireless link). This solution has been inserted in the system architecture of the EUREKA CELTIC BOSS project for enhancing the security of passengers inside commuter trains. The dynamic adaptation solution proposed allows to offer better quality of service (QoS) for critical streams, as well as enhanced robustness to channel conditions variations. Simulation results as well as integration of this feature in the BOSS project demonstrator are presented to illustrate the gains this approach can offer.