Video recorders record video onto a regular computer hard drive – this enables quick search of necessary records in the archive, no loss of video signal quality, and ensures reliability. Video recorders are used in systems of any level, from small systems, for example video surveillance for a dacha, to large corporate solutions.
Modern video recorders have many different functions, are easy to use, and some models allow viewing images from them over the Internet or a local network.
Today, visual surveillance is an integral part of any comprehensive security system: nowadays CCTV cameras are installed almost everywhere crowded. Filling offices, airports, and metro stations, they gradually move into private life, making it calm and comfortable. Nobody is scared or surprised by a lens that peeks from behind a cottage fence or rises above the entrance of a large building.
Purchasing a CCTV camera today is as natural as installing front doors with a reliable lock. It is not only because the cost of CCTV cameras is relatively low and any buyer with any income can afford such a device. Modern cameras also work via wireless technologies, providing wireless video surveillance.
A modern visual surveillance system allows monitoring events, recording their sequence, and pre-programming the expected response of the security system as a whole: CCTV cameras can register an alarm event, the system can recognize it within seconds and act according to instructions. For example, it can automatically lock doors, sending a signal to security about a robbery attempt, or start broadcasting a pre-recorded message. If the cameras for the video surveillance system were chosen correctly, the capabilities of the security system are truly limitless.
Specialists selling CCTV cameras conditionally divide the criteria for selecting video cameras into two groups – technical and functional. Functional criteria determine the required type of camera based on various characteristics of the area being protected; technical criteria determine the required image quality and additional capabilities.
Not all buyers can independently understand the functional and technical criteria for choosing video cameras. The huge variety of their types (classic, indoor, miniature, outdoor, dome) and main characteristics (sensor size, resolution, sensitivity, etc.) intimidate inexperienced users. Therefore, before purchasing a CCTV camera, it is recommended to consult specialists.
_