Abstract: The transmission and display of video is an essential part in the e-learning system. Because of the great capacity of video data and durative transmission, the efficiency of the processing on the transmission and display module directly decides the stability and usability of the system. This thesis proposes a double-deck structure in which command and data are transmitted separately, as well as an idea which could solve the problems of the user mode through kennel mode. This thesis presents the feasibility of applying the virtual camera in e-learning system based on H.323, and gives a realization method furthermore.

Key words: e-learning, H.323, virtual camera, DirectShow

摘要： 视频的传输和显示是现代远程教学系统中的基本组成部分。由于视频数据的数据量大，传输具有持续性的特点，因此视频传输和显示模块的处理效率直接决定了系统的稳定性和可用性。该文提出了远程教学系统中信令和数据传输分离的两层体系结构，以及利用内核模式解决用户模式问题的新思路，阐述了虚拟摄像头在基于H.323的远程教学系统中应用的可行性，进一步给出了该方案的具体实现方法。

关键词: 远程教学, H.323, 虚拟摄像头, DirectShow

CLC Number: 

• TP311