【摘要】 在传统视频字符叠加系统的基础上 ,利用了 Microchip公司推出的单片机 PIC16C73和 NEC公司推出的专用字符叠加芯片 u PD645 3,开发了一种新型高度集成化的视频字符叠加系统 ,详细论述了该字符叠加系统的工作原理、硬件电路设计以及软件设计。该系统已在实践中得到成功应用 ,是视频字符叠加的一种较好的选择方案更多还原

【Abstract】 Based on the traditional video and character superposing systems, this paper designs a new kind of highly integrated video and character superposing system by taking advantage of PIC16C73 and uPD6453, and discusses the operating principle of the system, hardware circuit and software design in detail. This system has been successfully applied in practice, which is a preferable choice to the video and character superposition.更多还原