摘要
提出一种采用行逆扫方式的数字化加、解扰的方法。其主要特点是充分利用当今高速ＳＲＡＭ的特性，用一片ＳＲＡＭ实现数字化电视信号的读、写，简化了电路。介绍了系统原理和ＳＲＡＭ的读、写时序及相关电路的硬件设计。
A digital scrambling and descrambling method using horizontal blanking intervals is proposed in this paper.It features the sufficient utilization of the characteristics of high speed SRAM′s available currently,the use of a single chip of SRAM for both reading and writing digital TV signals,and the simplification of the circuit.The principle of the system,the timing sequence of reading and writing in SRAM and hardware design of related circuits are described in this paper.
出处
《电视技术》
北大核心
1998年第8期66-68,98,共4页
Video Engineering
关键词
有线电视
数字式加解扰
行逆程
CATV Digital scrambling and descrambling Horizontal blanking interval
