一种基于CPLD和PCI总线的视频采集卡的设计

Image collection card’s design based on CPLD and PCI interface

设计并实现了一种以CPLD为数据采集逻辑控制单元,以PCI总线为接口,采用视频专用处理芯片SAA7115来实现图像预处理的视频图像采集系统。详细讨论了CPLD的控制逻辑和图像预处理。采用CPLD实现视频图像信号采集,提高系统性能,同时具有适应性和灵活性强、设计、调试方便等优点。实验结果表明该系统实现了图像的实时采集。

An image acquisition system is designed. The chip SAA7115 especially for video deals with the image signal previously. PCI bus is used as the interface; and CPLD controls to realize the collection. The main point of CPLD control logic and disposal of image signal part is expanded in details. Using CPLD to realize video signal collection will enhance the system capability. It also has such advantages as adaptability, flexibility, easy to design and debug. Experiment shows that real image is obtained from this system.