摘要
公共安全、工业控制、科学研究等领域对摄像机的分辨力和帧率提出了越来越高的要求。针对这一应用需求,本文提出了一种200万像素、每秒15帧高清高速数字摄像机的设计方案,给出了设计中关键技术的解决方法。该设计主要由ICX274、AD9923A、XC3S1200E、TE3310RPF和AT91RM9200等组成。AD9923A为ICX274提供垂直和水平驱动时序,放大ICX274输出的模拟视频信号,完成模拟视频信号的AD变换。XC3S1200E将AD9923A输出的数字Bayer信号转换为YUV格式数字信号送给TE3310RPF,并由TE3310RPF实现JPEG压缩。AT91RM9200通过网络将图像压缩数据传送到客户端。解决的关键技术包括CCD垂直、水平时序的产生,CCD信号相关双采样的控制,Bayer信号到YUV信号的转换,数据压缩以及压缩数据的采集与网络传输。实验结果表明,该设计方案每秒可以采集、压缩、传输200万像素图像15帧,图像质量较好。
A design method for high-resolution and high-speed digital video camera, which supported 2.0Mega Pixels and 15 frames per second, was presented. How to solve some problems of key technology on the video camera was introduced. ICX274 was used as CCD sensor, AD9923A was used as the analog front end and other chips included XC3 S 1200E and TE3310RPF. The AD9923A converted CCD analog signal to digital signal. The digital signal was sent to XC3S 1200E which converted Bayer signals to YUV signals. The YUV signals were inputted to TE3310RPF to generate JPEG data. AT91RM9200 sent the JPEG data to network. Many key technologies which included CCD timing control, Bayer signal to YUV signal conversion, TE3310RPF control, and data transmission in network were involved in this video camera design. How to solve these problems were also introduced. The testing results show that the design method can collect, compress and transmit 15 frame 2.0Mega pixels image per second.
出处
《光电工程》
CAS
CSCD
北大核心
2009年第5期117-121,共5页
Opto-Electronic Engineering
基金
国家自然科学基金重点项目(60736046)
国家863高技术研究发展计划项目(2006AA12A104)基金资助项目
