A particular USB source filter is designed to send USB capture data to DirectShow system, and a capture filter and a compressing filter are added to the system to complete the software function. 本文设计了专门的USB源过滤器,将USB采集的数据送到DirectShow系统中,并向其中加入采集过滤器、压缩过滤器等,从而实现了软件功能。