摘要
针对当前嵌入式领域中多路视频采集显示系统的问题,提出了一种基于FPGA的新方案。给出了系统的组成结构,详细分析了设计原理和关键性问题。使用状态转移机实现了I2C总线协议和TFT-LCD控制时序信号的产生,基于分时复用技术实现了对多路视频信号采集的同步,利用双SRAM切换技术解决了读写显示缓存的冲突问题,采用组帧技术完成了隔行扫描到逐行扫描的变换。经工程化验证,系统具有采集显示效果好、成本小、功耗低等优点。
Aimed at the problem of the embedded multi-channel video acquisition and display system,a new one based on FPGA is put forward.The configuration of the system is given.The principle and key issue are analyzed.Using the status shift mechanism,the protocol of I2C is realized and the controlling time sequence signals of TFT-LCD are produced.The synchronization among multi-channel video acquisition is achieved by using time-division multiplexing technology.The problem of conflict between reading and writing frame cache is solved through the two SRAM switch.The frame composition technology is applied to accomplishing the change from interlaced scanning to progressive scanning.The result of project application shows the virtues of system,such as good effect of acquisition and display,low cost and low power consumption.
出处
《液晶与显示》
CAS
CSCD
北大核心
2010年第6期831-835,共5页
Chinese Journal of Liquid Crystals and Displays
基金
武警工程学院基础研究基金项目(No.WJY202017)
关键词
多路视频采集显示
状态转移机
分时复用技术
双SRAM切换
组帧技术
multi-channel video acquisition and display
status shift mechanism
time-division multiplexing technology
two SRAM switch
frame composition
