【摘要】 在监控系统中,常常需要在原始视频中叠加上一些字符信息,以便事后分析判读。本文提出了一种基于UPD6464的视频字符叠加电路设计。详细介绍了字符叠加的原理、字符叠加电路的具体设计、显示信息的远程通信。通过多次实验,证明本文提出的字符叠加电路具有实现简单、工作可靠、屏幕显示信息可通过远距离高速传输到字符叠加电路上且传输信号抗干扰性强的特点。更多还原

【Abstract】 Sometimes it is necessary to overlap some characters sign in original video information in monitoring system,so as to analyze images afterward.A circuit design for character sign overlapping based on UPD6464 is proposed in this paper.The principle of character sign overlapping,electronics design of character sign overlapping,and the remote communications of the display message are presented in detail.The experimental results demonstrate that the designed circuit features simple to realize,stable to work,and the display message can be transmitted to character sign overlapping circuit through remote highspeed transmission without interference.更多还原