Circuit is a term that comes from the Latin circuitus and refers to ride closed curve, the route previously set that ends at the starting point or the included land within a perimeter. Cerrado, on the other hand, is something which has no outlet or it is strict.
The concept of closed circuit, therefore, relates to the interconnection of two or more components with at least one closed path. The closed circuit in the electricity involves a set of sources, switches, resistors, semiconductors, inductors, capacitors and cables, among other components.
The closed circuit, the flow of electric current flows between components. Usually, a circuit of this type has producers or consumers current apparatus interleaved manner.
A CCTV, also known by the acronym CCTV ( Closed Circuit Television ) is a technology that allows viewing different environments for surveillance. Its name originates from the issuance of the images is for a limited number of viewers, unlike traditional TV.
It is possible to assemble a closed circuit television with one or more video cameras connected to one or more TVs or monitors, which are responsible for reproducing images. If a recorder is added, the videos can be stored.
The CCTVs are common in companies. Many choose to install cameras at the entrance, reception, offices, factory and warehouse, with monitors placed in a special room by a person surveillance, who must intervene or notify the police in the case of detect any unusual movement.
Depending on the technology and brand, among other factors, the cameras used to set up a closed circuit are very variable pricing, and performance are also very different from each end of the range of alternatives. Deals equipment usually offer images every few seconds, instead of a sequence of video without interruption, although this does not always depend on the camera used.
When monitoring is remote, or that one or more people assume the task of monitoring all movements of an address from another geographic point, the fluidity of the images responds in part to the speed Internet connection available in the position you want monitored. On the other hand, it is noteworthy that even in cases where normal videos are sent there some delay, since the information must travel from one place to another.
While today in many cities already have connections 100Mb / s, there is still a large percentage of the world population that barely exceeds 3Mb / s; in addition, the stability of the signal is usually quite poor for most users of the Internet, and this is directly related to the technology offered by the service provider, but also with issues such as congestion and climate.
Therefore, even in an era in which many enjoy streaming videos high quality, it is not a general situation, and this is also reflected in the surveillance systems of small and medium enterprises that rely on technology antiquated.
In addition to the fluidity of the images, a very important factor of a CCTV is the quality of them. One should not forget that to know in detail the movements of a shop, for example, a place where there are often many people over several hours, it is necessary to have a good resolution, good refresh rate and system compression that does not cause significant losses in the tables.