Design And Implementation Of Campus Network Based Screen Teaching System

During the last few years, with the rapid development of applying technology in computer science, network teaching based on network and multimedia technology is gradually changing the traditional teaching style. Network teaching technology enables sharing and optimizing of learning resources, it extends the number of students that teachers work on, it provides learners a way that helps them to obtain rich knowledge, it extremely alleviates the contradiction between rapid increasing knowledge requirement and lacking of teaching resources. Now network teaching is an important component in modern teaching hierarchy. So implementing an efficient, stable, low delaying and interactive network teaching system has a crucial important meaning.Campus network screen broadcast teaching system is a kind of video conference like system with real-time feature. Because multimedia information such as desktop screen, video and sound generated at teacher's computer when a teacher is holding an active class sends to student's computer in time. By using our system teacher can create network active class, students can join in the class created by their teacher via campus network, so traditional classes has no teaching location limitation any more, it extremely extends the number of taught students.In this paper we analyze functions and features of current popular teaching system at the beginning and point out their limitation. After that we propose a multimedia data transmission model based on application layer multicasting technology, and we design and implement a screen broadcast teaching system based on the transmission model. During the process of designing and implementing the system, we choose efficient solutions by comparing current common used multimedia technologies. Finally, we make a conclusion that look forward to future edition of the system.