Abstract: This disclosure describes a method of transmitting media data from a source device, the method comprising establishing, with the source device, a first communication session between the source device and a sink device comprising a vehicle head unit, wherein the first communication session conforms to a communication protocol. The method also comprises discovering, with the source device and by the first communication session, the sink device. The method further comprises, during operation of the first communication session, establishing with the source device a second communication session between the source device and the sink device, wherein the second communication session conforms to a wireless display protocol. The method also comprises transmitting, using the second communication session, media data from the source device to the sink device for output to an interface of the sink device.

Abstract: The present invention provides a method and system for improving video surveillance. The system comprises a video surveillance platform ViSS and a first server SVAS connected to the video surveillance platform. The video surveillance platform includes also a second server CSM and a gateway CSG. A user side camera captures the user's head motion and a user side DVS sends the captured video to the SVAS via the ViSS. The SVAS processes the video, analyzes the head motion and sends the result of analysis to the CMS, Then, the CMS sends a corresponding instruction to the CSG according to the result of analysis. Next, the CSG translates the received instruction into a PTZ control instruction and sends this PTZ control instruction to an on-site DVS. Finally, the on-site DVS indicates an on-site camera to perform a corresponding action according to the PTZ control instruction.