Implementation Of VOD Technique In Army's Multimedia Instruction

At present, the traditional "four ability" instruction is mainly adopted in the army instruction. Under this instruction method, the trainees can only accept knowledge passively, and cannot select related instruction contents according to their own characteristics. Thus the further advance of the army instruction level is limited to some extent. As a kind of rising instruction mode, multimedia instruction can effectively make up for the traditional instruction mode and improve the army's instruction level. And then the army attaches importance to multimedia instruction increasingly.In recent years, the development of army LANs is very rapid. The LANs construction in many troops has been extended to companies and some even to platoons. On this basis, only one multimedia server is required to realize multimedia instruction in the army LANs utilizing the VOD technology.Therefore, in this paper an implementation scheme of web-based VOD order program system is designed according to the practical situation of the army LANs. In this paper, we introduce some key technologies of VOD system in detail, analyze some problems in the developing process, and give some appropriate solutions to the actual problems, such as video compression, audio compression and the control of concurrent user number, etc.In the practical realization process, we utilize Real Server as the stream media server, JSP technology to create the system page dynamically, Tomcat as the Web page publishing environment, JSP and JDBC database interface technologies to separate the video server and the Web server logically, as well as the RTSP and HTTP protocols to transfer video files. Additionally, we also adopt COM technology to realize the embedment of the client player in the browser.The designed system can preliminarily realize the multimedia instruction function using VOD technology in the army's existing LANs. With the gradually improvement and optimization of the system, it will be definitely helpful to the daily training and teaching of our army.