Clearly, in such cases, a digital system is not necessary. Is enough simple switching-adder type quad, multiplexer, and even a simple switcher (device allows consistent access to multiple channels). But of course neither of which increase the system in this case, however.
Camera - image source object selected for monitoring or protection. We all know how much of CCTV cameras depends on, which is a key element of these systems. Well chosen camera provides high quality images, and is the main, if not the only requirement to get the desired image on the screen of the operator security system.
The role of the camera in the analog video surveillance systems is obvious and does not require much explanation. But in digital video surveillance and recording, which is now becoming the dominant role of camera is no less, and perhaps even more important. Any, even the most intelligent software can not improve the poor quality of the image obtained with the correctly selected for the service condition camera. In this case, important information will be lost forever. And given the subsequent compression of the video and a low rate, which provides further information loss and reduced quality (depending on the algorithm and compression), it becomes apparent that in professional digital video surveillance camera role should not be underestimated in any case.
Typically, the choice of camera specialists CCTV preferred picture quality, design models (since there are many to choose from) and a minimum set of cameras needed for the task. However, the correct choice of a camera does not solve all problems. Do not forget that improper installation can bring cameras to "no" all the benefits of the model.
There are plenty of practical advice (of which we will discuss below) to install a camera, depending on the specific conditions of the object. But one can say with certainty: Building - a task for professionals, and it must be solved in a professional manner. If the budget deficit is a decision can be implemented in several stages, but, nevertheless, its implementation should remain at a high level. Such a solution is possible only if you use quality equipment. In the Russian reality avaricious pays twice and still poses a threat to the security of the facility, with its complex infrastructure.
After the rapid introduction of CCTV in Russia in 1991, has seen many changes. Outdated cameras with a resolution of 400 TV lines and a low sensitivity of 1 lux replaced by others.
They are designed with modern concepts of image quality and are manufactured using the latest technology. The last two years have shown a significant development capabilities of the equipment used in the field of CCTV. More rapidly developing new digital processing, transmission and storage of large amounts of video quality. Therefore, the average image quality and a minimum set of cameras ceased to satisfy the experienced user. And the companies that supply equipment to the market CCTV, have something to offer them.
Currently on the market a wide range of CCTV models in which it is difficult to understand the uninitiated user. Range of problems which can solve these cameras is very wide. From the simple, such as visual observation came the guest, to complex, such as remote access to cameras of any object through the global Internet. In each case, depending on the task (observation area, protection of territory, identifying the offending site and track the development of the situation with a high degree of information content), you need to find a compromise between a set of required parameters, the opportunity to choose the model and its costs, especially in confined budget. We will try to familiarize readers with the modern market cameras and their applications.
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