Organization and Design of Video Surveillance Systems Taking into Account the Latest Developments and Trends

The security industry is currently experiencing a boom in digital video recorders which, like any new trend, have rapidly entered our lives and replaced old, outdated surveillance systems. Modern technologies have made it possible to fundamentally rebuild the processing of digital signals using the PolyVision product line, with channel counts from 4 to 32. Professional video equipment is equipped with a set of functions that help conduct surveillance using several color or budget high-resolution black-and-white cameras.

The cameras are intended for indoor and outdoor installation, where they are protected from external influences by a special protective thermal housing. The software allows remote administration via a computer. Video information is recorded to a hard drive or other media. The latest PolyVision DVR models automatically record moving objects.

Video signal processing devices handle information coming from cameras connected to the video inputs and transmit the image to a monitor. Connecting two or more monitors allows simultaneous monitoring from several dozen or even hundreds of cameras installed in different rooms and on the territory adjacent to the secured facility.

Signals are registered and events are recorded in real time. At the same time, recording is performed in MPEG4 format with subsequent archiving and storage on a hard drive. However, if necessary, daily recording can be carried out at 6–8 frames per second, which still enables the detection of unauthorized entry and identification of intruders. Simplex DVRs play back and record images, with archive operations performed separately. Triplex DVRs allow simultaneous recording — possibly at different frame rates — of events, real-time playback, and working with previously archived files on a separate monitor or in one of the quad windows.

Video images from cameras can be received not only on a monitor but also on a mobile phone when remote administration is used. Recording to the hard drive is performed at a resolution of 704x288 pixels using MPEG4 compression. If power is lost, recording resumes automatically.