IP可视电话视频会议系统设计与实现

从H．323协议族和MCU系统的软硬件结构设计出发，讨论了一种基于H．323协议的IP可视电话视频会议系统。它是一个针对特殊需求而设计的嵌入式系统，在网络层采用分组交换技术，以提高网络资源的利用率；硬件采用双板结构，将音／视频编／解码、数据封装等支撑硬件放在母板上，将网络通信等功能放在子板上；板间通信采用了流机制，软件系统采取了数据驱动的方式。上述方案能够为视频会议系统提供高可靠性、低廉的成本以及较好的可移植性，对类似的小型视频会议系统的研究和开发提供了一定的参考价值。

Design and realization of conference system based on IP video phone

Beginning from the ITU H.323 multimedia communication protocol and the hardware and software architecture of a MCU system, a IP video phone conference system based on the H. 323 protocol was introduced, which is a embedded system de-signed for special requirement. To enhance the utilization performance of network resource, the grouping exchange technology was applied in the network layer in this system. It was specially put forward a double process boards hardware structure-the sup-port hardware for audio/video encode and decode, data encapsulate etc was integrated in the mother board and the communication function with the network in the subsidiary board. The two boards communicate with data stream mechanism and the software system was also drived by data stream. High reliability , low cost and good transplantation to the realization of IP video phone conference system were provided, which was meaningful used to reference by similar small video conference system research and development.