摘要
视频切换技术广泛应用于监控系统、现场转播、广播电视、多媒体教学监控系统等诸多领域,需要从众多的视频信号中正确、快速、无失真的选择出一路信号传送到输出设备上。系统以AT89C51单片机为核心,通过识别键盘按钮开关发出相应选择信息,从而控制MAX440中心控制元件完成所需要的视频切换功能。主要研究视频线的选择、视频切换接口电路、通道显示电路及程序设计以及系统调试。经过测试系统性能良好,为实际视频矩阵切换系统的设计提供了有价值的参考。
Video switching technology is widely applied in monitoring system, radio and television, the multimedia teaching monitoring system, etc. The system should choose signal to the output device correctly, fast and without distor-tion. This system usesAT89C51 single-chip microcomputer as the core and it sends out corresponding choice information through the recognition of keyboard button switch so as to control MAX440 center control element complete video switch-ing function. The main research includes the video line selection, video switch interface circuit, channel display circuit and program design and system commissioning. Performance of the system is good after test, and it provides valuable ref-erence for the design of actual video matrix switching system.
出处
《科技通报》
北大核心
2014年第2期62-64,共3页
Bulletin of Science and Technology
基金
江苏省科技型企业技术创新资金项目(SBC201010125)
南京市科技人才创新创业专项(2010sc124018)
