Based on the structure of DirectX, VC++ program is used to control the USB interface, the video card and audio card, which has improved the speed and quality for capture and playback greatly.

• 研究了基于COM组件的DirectX技术架构,使用VC++开发工具编程,通过对USB接口、显卡和声卡的控制,实现了视音频信号的实时采集和高质量回放。