摘要
正确分离行、场同步脉冲信号和消隐脉冲信号是视频图像得以正确显示的关键。目前分离标准复合电视信号多是用硬件电路实现,如专用电子集成芯片LM1881等,而对于非标准的电视图像信号,无法用这种专用于标准图像信号的电子集成芯片,为解决这个问题,提出了脉冲序列信号检测方案,利用FP-GA搭建的硬件平台上,通过VHDL语言编程,从某红外相机输出的非标准的复合同步视频脉冲信号中,分离出显示红外图像所需的行、帧同步脉冲控制信号,并用QuartusⅡ7.2设计软件仿真,验证了其正确性。
It is the key of displaying image video signals to detach exactly synchronization pulse signal and blanking pulse signal.Now the hardware circuit consist of electron integrated chip such as LM1881 is used to separate the standard composite image video signals.But it can not deal with the non-standard composite sync pulse output signal.In order to solve the problem,the proposal for pulse sequence signal detection is designed based on the hardware of FPGA and VHDL programming language,with which the frame sync and line sync pulse signals which is required to display infrared image is separated from the non-standard composite sync pulse output signal of one infrared camera.The design is verified with the simulation of Quartus Ⅱ 7.2 design software.
出处
《机械设计与制造》
北大核心
2011年第5期203-205,共3页
Machinery Design & Manufacture
