| With the development of multimedia and network technology and appearance of the communication requirement of the multimedia, the research of the Multimedia Meeting Communication System is attracting more and more attention. Especially since ITU proposed H.323 protocol, it have given the support of the meeting of the multimedia on the net based on packet exchanging, which promots the research and development of the Multimedia Meeting Communication System further. The potential growth momentum of multimedia meeting let some domestic and international famous enterprise pour into extensive passion in developing Multimedia Meeting Communication System. As the famous communication equipment developer, the company has already taken the lead in researching and developing its own a set of H.323 multimedia meeting communication system. Under the support of H.323 protocol, this system has already been easy to realize long-range multimedia mutual communication based on IP packet exchanging network, meeting of system. But today, as network security is being paid more and more attention to, how to offer consumers a set of multimedia meeting system has not been able to satisfy actual demand of user completely. A set of multimedia meeting systems that can ensure the communication security are the meeting communication system that numerous users need more urgently. For this reason, a problem badly in need of solution that the meeting system faces is: How to guarantee the meeting system secure communication? The designing and developing of the Video-information Cipher Machine ultimately offers the answer for settlement of the security problem. Video-information Cipher Machine is a outboard machine that can work independently from multimedia terminal. Its design purpose is to ensuring media's communication security among the multimedia terminal stations (such as the multimedia meeting terminal station ). Its realization way is through such important... |
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