【摘要】 本文论述了数字式电视特技图形的产生原理和实现方案,并对具体实现方法进行了分析,如图形存贮器的构成,数据读出方法,提高移位寄存器的利用率,扫换图形筛选电路的组成等。最后还给出了能产生箭头、方形、菱形圆形等的实用的,国产集成电路可实现的系统的方框图。更多还原

【Abstract】 In this paper we describe the principle,design and implementation of generation of digital TV special-effect figure.Several problems,e.g.,the constitution of figure memory,the way of data readout,the utilization ratio of the shift register,and the construction of wipe figure choosing circuit,are discussed in detail.Finally,a block diagram of practical generator which can produce arrow,square,rhombic,and circular figures is presented.更多还原