Design On IP Multicasting Based Stream Media Living System And Realization

With the rapid development of Internet, the applications of networkmultimedia have been spread up and become a popularization. However,traditional multimedia files should be downloaded entirely first so that it could be played. That makes conflict with the limitation of the network bandwidth. So the Stream Meida, a technique providing playing with downloading multimedia data, comes into being. The technology of multicast in Stream Media has more advantages when it is applied for the application of direct living broadcast through IP network or IP television. It can make the media server send continuous data to more than one customer client synchronously without any delay or broadcast storm. Therefore it can improve the availability of the network system. This paper aims at such applications and designs a scheme of video stream media application based on IP multicast.This paper is based on the research of the basic theory of video stream media, proposes the whole frame of the video stream media IP multicast scheme, and seperately explains in detail the research, design and implementation of the media server, customer client .In the part of the design and implementation of stream media server,this paper stressly researches the IP multicast technolog, the double buffer technolog,SOAP technolog, stream media schedule technolog,XML technolog ,and thread pool technolog.Furthermore, it completes the arithmetic design of the sending and receipt of the multicast data by video sending filter and video receipting filter, the feedback obstructs control strategy and realizes the whole functions of the video stream media server. For raising the efficiency of server as far as possible, this text still adopts a line distance pond to manage a set to sow the line distance that the video frequency flows.In the part of the customer client design, this paper especially discusses how to join the multicast group, the realization with double buffer technolog,and audio frequency and the video frequency synchronous problem. It also introduce the MPEG-4 technology,the directshow technology.