基于DSP+CPLD的视频采集系统的设计与实现  

Design and realization of video capture system based on DSP and CPLD

作　　者：吴毅杰[1] 赵敏[1] 顾俊俊[1] 孙梦宇[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《电子测量技术》2009年第9期140-143,共4页Electronic Measurement Technology

摘　　要：以构建无人值守火灾监控报警系统的实际工程应用为背景,设计了基于DSP和CPLD的视频采集系统硬件平台,详细分析了视频A/D转换芯片SAA7111A的行、帧时序,以此为基础设计了采集图像大小可调的CPLD控制逻辑并给出仿真结果,最后给出了系统实际电路和采集结果。本系统采集图像的格式、大小可调,通用性得到增强;可独立于计算机工作,受环境限制小,使用灵活性得到提高。Serving for a practical engineering application of building unmanned fire monitoring and alarm system, a video capture system based on DSP and CPLD is designed in this paper,with the detailed analysis of HREF and frame timing output by the enhanced video input processor SAA71llA, then the CPLD control logic to capture different sizes images is designed aecoMing to the analysis and simulated, finally the paper shows the system circuit board and gives the experimental result sampled by the system. As the system can capture different formats and sizes images, system versatility is enhanced. Meanwhile the system can work independent of the computer, subject to environmental constraints is limited, so the flexibility to use is increased.

关 键 词：视频采集系统 复杂可编程逻辑器件 SAA7111A 采集控制逻辑 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]