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Video surveillance systems - purpose, principles of construction
Video surveillance systems are an important part of building an overall security system at the enterprise level. Its main purpose is visual observation, recording (video recording) of events in the section of the technological zone allocated for tracking. Installation of video surveillance allows continuous monitoring and recording of the situation in the surveillance area, if necessary, view the recorded images.
The construction of modern security systems is based on the widespread use of digital (information) technologies, including the use of the Internet. The configuration of video surveillance systems is based on the same principles. It includes video surveillance cameras, recorders, servers. Visual observation and registration can be used in local control and access systems such as video intercoms. Such complexes can include outdoor panels, electromagnetic locks, control sensors.
The most common configuration of an enterprise (office) video surveillance system has the following structure:
video cameras (analog, digital, including IP cameras, color, black and white)
DVRs (servers)
CCTV remote control with monitors (LCD, CRT)
auxiliary equipment (uninterruptible power supplies, routers, cables, brackets, housings).
Camcorders can be located outside the room and inside it. They can be swivel and fixed. Installation of video surveillance can be organized in an open or covert way. Outdoor CCTV cameras are usually housed in protective housings.
Digital video surveillance systems work with video signals in discrete (digital) form. This technology provides for the conversion of analog video signals into digital using video processors. This is necessary for its further computer processing and storage.
The IP CCTV camera has a built-in video processor in its design. The signal generated by the IP camera is directly transmitted to the server for processing. Here, the video signal is compressed (eliminated redundancy) and recorded for storage (archived). The archiving depth can range from several days to several months, depending on the number of Pasang CCTV Murah and the image quality (the degree of information compression).
The structure of specific surveillance systems depends on the goals that are set for it. Accordingly, the necessary equipment is selected for these purposes (wireless or hybrid data transmission). From this, the total cost of installing surveillance in an office or enterprise can vary greatly (from one to several thousand USD). Among the popular brands of equipment for organizing visual television surveillance are video cameras and digital video recorders (DVR) from J2000, Sunkwang, LCD monitors from JVC, etc.
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