(Today, the concept of networked video surveillance is more and more widely accepted by the masses. At the same time, the digitalization and networking trend of security monitoring office is also irresistible. The so-called network video surveillance refers to the digital encoding of the monitored video images through digital and networked video front-end devices, such as network cameras or video encoders, and then transmitted to the terminal's office station and server through the computer network for browsing. .)