摘要
为防止视频信号传输线路被随意改动而导致伪图像的引入,采用了对视频信号进行实时同步检测的机制,一旦发现视频信号异常,及时报警.该同步检测机制的基本原理为:首先产生一套伪随机符号序列,按照伪随机符号序列,在视频采集端叠加符号,然后在主监控端对该符号进行同步检测确认,从而防止伪视频信号的引入.
In order to prevent the introduction of pseudo-signal caused by arbitrary changes of the video signal transmission line,we use a mechanism of real-time synchronous detection.Once the video signal is abnormal,it will give a warning in time.The principle of synchronous detection mechanisms are summarized below： firstly,generate a pseudo-random sequence of symbols,and superimpose symbol in the video capture terminal in accordance with the pseudo-random sequence,secondly,recognize the symbol synchronously,thus prevent the introduction of pseudo-video signal.
出处
《苏州大学学报（自然科学版）》
CAS
2010年第2期39-43,共5页
Journal of Soochow University(Natural Science Edition)
关键词
随机队列
同步检测
视频防伪
random queue
synchronous detection
video security
