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目前阻止非法信号入侵的方法主要是在卫星地面站进行卫星信号的监测。基于对DVB的TS流分析的非法信号防范系统,能够实现多路TS流的实时监测和图像异常监测,在电视台前端就能防止非法信号的入侵与播出,是现有防范体系一个很好的补充。此外,延时播出功能大大延长了出现问题后的反应时间,如果监测到卫星信号受到非法信号攻击,可自动或手动将输出切换到备用节目源。
The current method of preventing the intrusion of illegal signals is mainly the monitoring of satellite signals at satellite ground stations. Based on the DVB TS stream analysis of illegal signal guard system, to achieve real-time multi-channel TS stream monitoring and image anomaly monitoring, in front of the TV station to prevent illegal signal intrusion and broadcast, the existing preventive system is a good supplement. In addition, the delayed play function greatly prolongs the reaction time after the problem occurs. If it is detected that the satellite signal is attacked by an illegal signal, the output can be switched to the standby source automatically or manually.