基于Android的屏幕分享控制系统的研究-检测技术与自动化装置专业论文.docxVIP

Research Research on screen sharing control system based on Android Discipline：Detection technology and automation device Student Signature： №‰17M 厂 ／- Supervisor Signature： b鲫。_ Abstract For the problem in multi—screen interactive real—time multimedia transmission，tlliS article describes three kinds of currently existing real—time multimedia transmission scheme，and compare these programs．By comparing the advantages and disadvantages of these programs， designed a scheme which based on the Android system and use WiFi Display standard real-time multimedia transmission．T11is article adopts the WiFi Direct as transport programme,So the devices can complete point--to-point high·-speed transmission do not rely on AP．In the Android system，using the latest WiFi Display standard for multimedia real—time transmission，that need to use the TCP protocol for communication between the parameters of transmission equipment before transmission,then send the data by the UDP protocol after decide the parameters． The system includes Source device(Send device)and Sink device(Receive device)．Source device’S main functions includes：to search and find Sink device；establish a connection with Sink device by WiFi Direct；via TCP to obtain screen display parameters of the Sink device；capture the video from the Source device and compress it in H．264 standard；send the video data by UDP protoc01．Sink device’S main functions includes：to accept connection requests ofWiFi Direct from Source device and establish the connection with the Source device； to obtain the transmit data parameters from the Source device by TCP；receiving the transmission wim the data of Source device and output on a display device． In summary．the main work and innovations are as follows： 1)This article adopted the W谭i Direct for point to point transmission．the traditional methods of data transmission include Bluetooth and WiFi，Bluetooth Can make point to point transmission but that iS relatively slow,The transmission speed of