Sometimes the company after a review of targets can be concluded about the low effectiveness of installing video surveillance systems. Often fails to protect the object, only setting the perimeter burglar alarm (sensors on windows, doors, hatches, three-dimensional sensors and motion detectors in hallways and premises). At the same time does not need a system of closed circuit television or CCTV, such systems typically act as the second auxiliary circuit security system. When somewhere in the facility triggered protective sensor (electrical, infrared or any other), that information goes to the dispatcher sitting at the remote central monitoring. Then he takes the monitor is to the nearest camera and assesses the situation.
Video surveillance can reduce the number of visits protection, false alarm caused by the first circuit. Just CCTV systems are typically used to secure the event for this using special analog and digital video recorders. Entries are analyzed in case of emergency. Some systems have the function of the active record: the tape included only in those moments when the camera or sensor enters the alarm. What's the use of fixation events, if the unlawful actions (trespassing, theft) were still committed? The camcorder can not grasp the offender's hand – this would require an immediate response-trained group or the duty which can cause a police outfit. If the rate is just that, seeing the camera, the criminals Retiro spent on Video surveillance is meaningless – just install dummy cameras. According to American experts about 70% of potential violations are stopped for another phase of their planning by a show of force service security. In fact, serious crimes are carefully planned.
And if the "scouts" will notice a high level of security infrastructure (same camera, barred windows, trained security), the offenders may opt out of original plans and move attention to some other object. "Digital" or "analog"? The advantage of digital systems can be formulated as follows: low-cost PC-based platform (based on the same Intel processors and operating system Windows). Performance processors and other components of the PC is growing so fast that it allows you to build a relatively inexpensive and very fast PC-platform professional digital security surveillance systems. What are the main differences between digital video surveillance systems? The camera is generally used analog, then the signal is transmitted to the computer where the input video card is worth sampling. Signal processing, encoded and the "sum" on the hard disk for storage. Digital systems often compress video by removing redundant information. Theoretically, it may happen that the operating system is not digital camera fix the fraction of a second, when there was the fact of "distortion of" or other fraudulent activities. Analog recording is excellent as evidence in court specialists can always determine whether the installation was carried out film, and specify the place, "gluing". Therefore, an analog system for a long time to be applied to the organization responsible for high-precision surveillance sites.