The Research Of VoIP Network Information Filtering And The Analysis Technology Based On SIP

With the globalization of economy and information, information technology hasbeen changing the traditional production, business and life style. Informationtechnology, information industry and information network have played increasinglyimportant roles in all realms, and gradually lead the development processes of societyand national economy. Meanwhile, with the advance of network technology, voicecommunication and voice transmission on IP network has been the emergingtechnique, i. e., so called VoIP. Right now most applications using this technique aretools for chatting over internet, the people enjoyed at the technology which took to ushappily to live, at the same time, open environment has brought the disorder andchaotics to the network. Increasing to track and supervise the network activity andsharpen the ability of filtering the network information, which becomes one kind ofintense demand.The intention of this paper is to discuss the VOIP technique by introducing itstechnical basis and the related SIP protocol and discuss the architecture ofsurveillance system over internet; furthermore it analizes the theory of IP networkvoice processing technique and demonstrates the existing problems, its causes, andtheir solutions. Based on the practical requirements, it proposes the architecture fora surveillance system over the internet; its high level designs and implementation.Finally this paper is conclueded by giving the achivements of the VOIP applications,facing difficulties and future direction.