摘要： 通过对以软件方式实现的视频会议系统介绍，该文提出了如何利用声卡简单音频设备来实现音频的实时的采集、回放，并介绍了使用多缓冲区技术的实现方法和音频的传输、消噪以及关键技术。

关键词: 视频会议系统；媒体控制接口；音频；多缓冲；实时传输；消噪

Abstract: Through the introduction of videoconference system designed by software method, the paper applies how to use the sound card as a simple audio device to implement audio real-time collection, play-back, and points out the designing methods and key points in audio implementation, transmission and noise cancellation using multi-buffer technology

Key words: Videoconference; Media control interface(MCI); Audio; Multi-buffer; Real-time transmission; Noise cancellation