Design and implementation of video monitoring system based on MB90092 special character superposition circuit

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Design and implementation of video monitoring system based on MB90092 special character superposition circuit [Copy link]

1 Introduction

With the expansion of monitoring sites and the increase in the number of probes, the image display system at the monitoring end often needs to receive external data and display the relevant information on the monitoring screen in real time together with the image, so that the user can know where the image information comes from and the relevant information, time, regional logo, and real-time data displayed on the screen. However, for monitoring personnel, the attack on the monitoring end is a problem worth worrying about. Therefore, improving technical solutions and enhancing security are an urgent requirement for the current situation. Monitoring personnel hope to see a verified real image, regardless of time, environment, probe position, angle and focal length must be guaranteed. In remote monitoring situations, monitors of relevant important departments are often not completely assured of the real-time and authenticity of the received images, especially if high-tech objects are monitored in real time. Then, when the monitor temporarily leaves the monitoring station for a period of time for some reason, because they do not know whether the monitored party has attacked the monitoring system, they often have the requirement to confirm that the probe is working properly and the authenticity of the image seen.

The author introduces the concept of confrontation to design a video surveillance system with security assurance. The system uses a method of superimposing dynamic pseudo-random symbols on the screen to prevent the monitoring head from being disassembled during system operation. Once the line is disassembled, the confirmation mark given by the main monitoring end will no longer be displayed, thereby detecting the behavior of the high-tech personnel of the monitored party to arbitrarily disassemble the monitoring head system, effectively preventing the introduction of pseudo images caused by the arbitrary modification of the signal transmission line. This system can be used in some special occasions with high requirements and the monitoring background does not have environmental characteristics, such as special occasions with blue sky, white walls and wilderness as the background, and some important departments.