汽车防撞系统中视频图像采集系统的设计实现

Design of image acquisition system in automobile anti-collision system and its realization

提出一种用于汽车防撞系统的快速视频图像采集系统。利用PHILIPS公司的视频处理芯片SAA7111A作为图像采集芯片,在单片机和CPLD的控制下将采集到的图像数据写入帧存储器中供后续DSP对视频数据进行分析处理;针对汽车防撞系统对实时性的要求,帧存储器的设计采用两级级联的形式,达到了采集和数据处理的并行运行。

A high-speed image acquisition system in the automobile anti-collision system is presented. The Philips＇ SAA7111A IC is used to gather the digital video signal and save the data into the frame memory under the control of CPLD and SCM. It is processed and analyzed by the DSP. According to the requirement of the real-time anti-collision system the frame memory system uses two-steps of SRAM to achieve the parallel process between the data gathering and process.