论文部分内容阅读
在高频有线电视网(HFC)中,针对如何防止非法节目入侵问题,本文提出了一种有线电视节目保护系统,它是有线电视网络管理系统的一个子系统,以载波频率为87MHz的FSK方式实行密码通信,可靠性高,抗干扰性强,并且不影响正常有线电视节目的收看,从而有效地达到了保护有线电视节目的目的。
In the high-frequency cable television network (HFC), aiming at how to prevent the intrusion of illegal programs, a cable TV program protection system is proposed in this paper. It is a subsystem of the CATV network management system. Based on FSK with a carrier frequency of 87 MHz, The implementation of password communications, high reliability, strong anti-interference, and does not affect the normal viewing of cable programs, which effectively protected the purpose of cable television programs.