The Design And Implementation Of Streaming Media Server Module In MoIP Gateway

With the improving demand of informational family, the concept of "Digital Home" arises at a historic moment. As the core equipment of digital home, RG (Residential gateway) is not only the bridge between home networking and external networks, but also the key point of various services and applications of digital home. Home media gateway is one of the implementations of RG equipments based on MoIP(Multimedia over IP)technology. And streaming media server is the basic platform of various functions of home media sever. Moreover, streaming media server based on embedded Linux system has extra advantages of small volume, low cost and well stability.With this background, this thesis has studied the realization principles of the streaming media technologies, and designed a streaming media server based on ARM9 SoC(System on Chip)platform.The thesis firstly introduces the relevant protocols and key technologies about streaming media. Secondly, a software system framework of the server side is designed according to the application demand and the hardware foundation of the MoIP gateway. Thirdly, transmission module and signaling control module are designed orderly. After that, the interfaces and relationships of each module are discussed and process flows are described in detail. In the end, the testing process is inroduced. The result shows that the embedded streaming server meets the design objectives. The quality of media is beyond excellent and communicates well with client.The innovation of the thesis lays in selecting suitable model, standards and protocols according to the demand and application scenarios of MoIP gateway, implementing the sreaming media server and putting it into the pratical application. The design not only ensures the compression capability, but also decreases the coupling relationship between software and hardware, so as to make the system be with good transplantation and expandability. The design is easy to be implemented and makes full use of the hardware resources. Right now the module supports unicast only. So futher research and development can be made based on current achievements.