Monday, 2 January 2012

CCTV Camera

CCTV stands for closed circuit television. By definition, it is a television system in which the signal (video and audio) is not publicly broadcast but limited to a specific area or network. CCTV is most often used for surveillance purposes. It consists of a CCTV camera or a series of cameras which are interlinked and all send their signal to a central receiver. 

The earliest known instance of its use was in 1942 in Germany. It was used to monitor rocket launch tests. This was because it was detrimental to the health of humans to be too close to the launch sites. It also provided a means of monitoring and studying the launches carefully so as to make improvements on the rocket design an launch sequence. It didn’t hit the American coasts until 1949 where a company called Vericon started marketing it commercially. 

From its beginnings where it was used only in special locations like military bases and the like where there was an extremely high level of security required, CCTV has grown in use where it is now found in different applications such as home security, public surveillance such as in countries like the UK where it’s estimated that there is one camera for every 32 people, to convenience stores, banks, shopping malls, schools, stadiums, prisons, you name it. It has become a common feature of modern day society. It’s application is also used in the education field where it used for distant education. 




Its use is also common in situations where it is not suitable for humans to operate. As stated earlier, the average CCTV Camera network consists of a camera or cameras that are connected to a central receiver, which in some cases is a monitor or a set of monitors. For those on the market for a CCTV Camera system, There are CCTV Camera systems which come as a package which contains a Camera or Cameras, a Digital Video Recorder (DVR), Central Monitor Software, remote view software, remote control and the basic accessories like power supplies and cabling plus more accessories. Your complete CCTV Camera system in a box, if you will. We are now going to look at some of these accessories one by one. 

Firstly we will look at:

There are different cameras available to choose from for your CCTV network. We are not going to cover them all here but will go through the basic categories of cameras that are found on a CCTV Camera network. The first category of CCTV camera is the fixed type. The fixed type of camera is one that faces a fixed direction. The other category of cameras is known as the pan, tilt and zoom or PTZ cameras. This is a category of cameras that allows you to control the direction that the camera is facing and also allows you to zoom in for detailed monitoring of an area. This allows for less cameras to cover a wider area in comparison to fixed cameras.



A Closed Circuit Television Digital Video Recorder or CCTV DVR is a device that records analogue video and audio footage from a single camera or a network of cameras and turns it into a digital signal and then compresses it. This compressed video is then stored on a hard drive. In the case where a single camera is used, the DVR is built into the camera and there is no need to have  a separate recorder to capture footage. 

In situations where cameras are networked, the DVR is usually a stand alone device with an internal hard drive where video and audio footage is captured to. DVR units come in a range of different sizes namely 4, 8, 9 or 16 channels and sometimes more. These channels indicate the number of cameras which can be attached to  the particular DVR unit. 

The DVR revolutionized the CCTV industry in that there was no longer any need for numerous tapes and disks which needed to be replaced. Older systems involved the periodic changing of tapes or disks. The average DVR has storage space equivalent to 30 or more disks or tapes so they really offered a lot of convinience. Over and above this, it also has an array of other  impressive features, chief among which is crisp, clear video quality. Because the signal is digital and not analogue, you are able to get very clear video and audio quality from your CCTV Camera.

The CCTV network running a DVR also needs what is known as central monitor software. This software is what is used to control different aspects of surveillance such as panning and zooming e.t.c. Newer versions of CCTV camera are now self contained units that have everything, including the software, contained in the camera. 

They record directly to a central capturing unit (CCU). PC based versions of the central monitor software are loaded directly onto a computer and all the monitoring is done centrally from a monitor of set of monitors. Some versions of central monitor software like i-catcher console can connect up to 3 monitors on a single PC allowing for images from 18 or more different cameras to be centrally viewed. Most of these software programmes can also allow for a different mix of cameras to be connected on a single network therefore offering greater flexibility.

The advancement in technology and the wider use of the internet has not escaped the security camera industry. Faster internet speeds have allowed for remote access to your CCTV camera and camera networks from a remote PC or smart phone. This technology makes it possible to log in and view your home or business security cameras from anywhere in the world. 

All the user needs to do to access their security camera is log in to their security camera network using remote view software loaded onto their smart phone or PC. This kind of setup uses what is known as an IP camera, IP being short for internet protocol. The IP camera can operate as a standalone camera or as part of an organization’s existing internet network, thereby eliminating the need for extensive (and expensive) cabling.

Sunday, 1 January 2012

Digital camera reviews

CCTV camera is the short form for closed circuit television that refers to broadcasting a signal to specific monitors. A set of monitor that receives the signal from security camera is very specific and its range is very limited. Unlike broadcast TV, these cameras do not transmit the signal openly. 

One of the most common features of these spy security system is that it is being placed for spying anywhere. These CCTV security cameras are commonly employed in the most crowded areas where security must be tight. These places are airports, banks, ATMs, military facilities,  etc. Additionally, these cameras should be placed exceedingly corners look or a gas station.



Although, highly effective close circuit TV are strictly employed on the airports and banks in order to tight-up security. It should also be also installed in the places which are not secure for the people, or for keeping vigil to maintain the record a process that's observed and also controlled from managers. 

This security monitoring devices is very important because it help ion keeping your eye on home, shop and business houses as well. Anybody can get installed security systems as it can be installed at the very cost-effective prices and also ensure the complete security satisfaction to those people who have access control.

Some of the companies also have installed CCTV camera in their cab so that violence against the any commuter can be avoided and the safety of passengers especially women and girls safety can be ensured because so many times it is found that driver violate the rule and harass the passengers when they found the female passenger is alone and help for her cannot be reached taxi driver.

These security cameras are also used in police vans when these are on a surveillance mission. Now-a-days security has become primary concern for every people of the world especially after 9/11, one of the most disastrous attacks ever in human history. So majority of people get installed CCTV camera because somehow it ensures security and safety to the people of the world. Even though, it is the best for home security for every people but many people avoid installing spy or security camera because they think that it violate their privacy.

Initially it used to placed within premise of governments but now time has changes so most of the people across Australia and other parts of the world also want to get enjoy their lives safely and securely. Presently, the use of CCTV has increased drastically because it helps them in maintaining safety and insecurity within their premises.

So if you want to get installed security camera, then just make a search on internet because there are many companies which are offering not only CCTV but also they also offer installation and repairing services for the same.

One of the most important parts of these CCTV cameras is that the result on detecting criminals is highly considerable and the photographs caught in CCTV security camera systems will be used to prosecute such criminals. Many time these camera help in catching the domestic whenever they involved in illegal activities. It also beneficial for those home in which only old people residing alone. It also helps in catching traffic violation and misconducts.

CCTV Cameras Are Only Part Of The Equation

When a CCTV camera system is installed, the CCTV cameras are only part of the design concept. Simply putting cameras into a location is not an adequate CCTV system. There are several factors involved in designing a CCTV system, location, problem areas and type of camera utilized are all parts of the equation for a successful CCTV camera installation.

The type of camera installed is a factor, and yes there are different types of CCTV camera. Where they are placed on the property is a factor. What type of coverage that they provide is a factor. If they provide too much area coverage, identification of individual people can be compromised. What type of camera to install is a final factor. 



Does the camera need to be in color or is black and white sufficient? Does the camera simply need to monitor the area or does the client need to identify individual people. When a CCTV camera system is in the design stages, the provider of the CCTV cameras needs to sit down with the client and identify all of these areas.

Position of the CCTV cameras on the property is critical. If the camera is not in the proper position, then the camera can not view the problem areas that the client is concerned about. If the CCTV cameras do not view the client's areas of concern then the CCTV cameras are worthless to the client. The preliminary discussion with the client should delineate exactly what the client wishes to view and the cameras should be placed accordingly.

Problem areas differ for each client. A convenience store has different problem areas than a department store does. Each CCTV camera installation is unique and has different requirements. When it comes to CCTV cameras and their installation, there is no "one size fits all". The provider of the CCTV cameras has the experience to have a general idea of what each particular installation will require pertaining to coverage. This knowledge can be applied during discussions with the client to provide CCTV cameras and their position and application with the client.



In any application, there are different requirements. A camera that is simply utilized to monitor traffic in a location does not need critically high resolution. The client's need is to simply determine how many people are entering or leaving a specific area. A requirement to monitor faces or license plates on vehicles will require a camera of much higher resolution. 

As with any other product, the more resolution the client needs, the higher the cost will be for the CCTV cameras. Less sophisticated cameras are more inexpensive than the highly sophisticated cameras on the market. Designing a system involving CCTV cameras requires a mix of both unsophisticated and sophisticated cameras that meet the client's needs.

Meeting the needs of the client is the goal of the designer of a system that utilizes CCTV cameras. Only by sitting down with the client and defining what the clients needs are can a CCTV system be successfully designed and implemented. In many cases the client has no knowledge of what the CCTV cameras can do for him and only has general ideas. Through a client meeting, the CCTV system designer can define the needs and design a system that utilizes CCTV cameras to fit those needs
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