同时具备数字音视频录像机（DVR）和数字音视频服务器（DVS）的功能。
With digital audio and video recorders (DVR) and digital audio and video servers (DVS) function.
目前的视频会议系统大多基于H . 323协议，在系统中由视频服务器来接收、转发音视频数据。
Most of existing video conferencing systems comply with H. 323 protocol, and have a video server to receive and transfer the voice and video.
典型产品有：智能广播服务器、智能数字控制器、数字音视频处理设备、无线通讯模块、人体检测系统等。
The typical products are: server of intelligent broadcasting, intelligent digital controller, digital audio processing units, wireless communication parts, human inspection system.
由于视频服务器的CPU、内存、网络带宽的资源有限性，当用户数目增多时，音视频的质量急骤下降。
Because of the limitation of CPU, memory and bandwidth resource of the server, the quality of video and voice in conferencing gets worse quickly when the number of clients increases.
由于视频服务器的CPU、内存、网络带宽的资源有限性，当用户数目增多时，音视频的质量急骤下降。
Because of the limitation of CPU, memory and bandwidth resource of the server, the quality of video and voice in conferencing gets worse quickly when the number of clients increases.
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