CCTV systems

In the recent years, people are really concerned about theft as the burglars are increasing everyday and causing harm both to public places and your own home. With the introduction of CCTV systems criminal activities can be prevented to a great extent. The CCTV systems consist of some powerful video cameras, which are able to identify a trespasser and thus decrease crime rates considerably. Though previously this system was used only in public places but at present it is also used at homes to ensure residential security.
CCTV or Closed Circuit Television is an elegant system, which is created with the most updated technologies. CCTV systems are mainly used for surveillance by employing its point-to-point wireless links. These powerful security systems are widely used in important areas, which need special security such as banks, casinos, airports, shopping malls or military installations, army bases etc. CCTV systems were invented with a motto of observing the launch and take off of v2 rockets. In addition, the CCTV systems are also used to monitor the launch pad, before the launch.
Nowadays, the CCTV cameras are also installed outside government offices. The said systems have proved to be great for maintaining security in banks. As a matter of fact, CCTV systems are now holding a superior position amongst all other security systems. It is expected that the CCTV systems would potentially develop into the greatest security system ever invented. CCTV systems can be purchased very easily as the prices are stipulated according to your comfort.
Whether it is at your home or office, CCTV systems are just the best with an entire television network devoted for assured security. Unlike broadcast television, the different components of CCTV systems are hooked directly to each other through cables or direct wireless means. CCTV systems offer you with useful features like Multiple channel audio input, Pan/tilt/zoom, USB backup and Multiple channel video input. These features help you to observe several areas in your home at the same time.
While installing CCTV systems, it is important to maintain the prescribed laws. To be on the safe side, you can consult with your local law enforcement or a lawyer to ensure that local, state, and federal CCTV laws are strictly followed by you. CCTV systems would offer you with a complete protection both at home and outside.
Feel free to get in touch with Alarm Broker.

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Making the Right Choice While Looking for Cctv Security Camera

There are normally six things to look at before Selecting a CCTV security systems;1. Camera Selection2. Recording Options3. Detection4. Time and Date Stamping5. Cable and Connectors6. Camera Protection1.0 Camera Selection1.1 LocationIs the camera to be located indoors or outdoors? If outdoors then you need to ensure that it is appropriate for the environmental conditions that are likely to be encountered such as rain, snow, sun-glare, low light etc. Outdoor CCTV camera security systems Outdoor cameras should either be classed as weather resistant or mounted in a special enclosure to provide protection. All CCTV outdoor cameras provided by Voltek are weather resistant and the cable entry points are sealed. The leads are of sufficient length to enable connections to be made inside the building.1.2 Light LevelsChoosing the right camera based on the amount of available light is very important for an effective security system. An ordinary colour or even monochrome camera will not give very good pictures in low light conditions although the monochrome will perform better than an equivalent colour one. Solutions available for low light conditions can include:* B&W cameras with built in IR illumination* Colour Day / Night cameras* Use of additional security lighting* Use of a separate IR illuminator in conjunction with a monochrome camera. When using IR illumination ensure that the range of the illuminators is adequate for your needs. Light levels are usually measured in lux and although full daylight can be around 10,000 lux, dusk can be as low as 1-10 lux, complete darkness is 0 lux and side street lighting can also be less than 1 lux in some cases. The closer a camera is rated to 0 lux the better its performance in low light levels.1.3 Colour, Black and White or Day Night CamerasB&W cameras generally provide better image quality than colour ones at lower light levels. They are also usually cheaper than colour ones of equivalent specification. Colour cameras require the availability of good lighting and will generally provide better recognition capability. Day Night cameras provide the best of both worlds in an external environment. They operate as colour cameras during the day (or in good light conditions) and automatically change to B&W when the light levels drop. All Voltek Day Night cameras are supplied with built-in Infra-red illuminators which enable the cameras to see in darkness.1.4 Wired or WirelessWireless CCTV cameras are easier to install. There is no cabling to run from the camera to the receiver and they are ideal for temporary applications, rapid deployment or where running cable is not desirable. TheDay Night wireless Security CCTV cameras cameras do however require a power source and whilst most will have the capability to be powered by batteries these do not have a very long life - a matter of hours in some cases. Wherever possible the cameras should be powered by the mains. Typical range for wireless camera systems is 100m free-space but this can reduce significantly to around 20 meters in a typical household environment. In some cases there is also the potential for interference when using wireless systems.1.5 Visible Deterrence or Covert / Discreet MonitoringFor visible deterrence the use of larger cameras housed in traditional enclosures are ideal. For covert or discreet applications Voltek supplies Discreet or Covert CCTV security cameras that are:* Very small and can be installed in covert locations, or* In enclosures designed to disguise the presence of a camera.Many of the cameras manufactured by Voltek are both stylish and discreet in the design of their enclosures and this makes them very suitable for domestic applications.1.6 AudioIf the ability to monitor or record sound is important then the camera needs to have a built-in microphone. This enables one-way audio monitoring. Some cameras such as the SuperCam2 from Voltek have a 2-way speech facility that enables you to speak with your visitor without answering the door.1.7 Camera Viewing QualityThe resolution, size and type of camera sensor will influence the quality of the viewable image.Resolution – This is expressed as the number of television lines (TVL) that the camera is capable of producing. The higher the TVL value the greater the resolution and hence the quality of the images. A typical entry-level camera will be around 300 TVL with higher resolution cameras having a value of 400+ TVL.Size – A larger image sensor will give a better image definition than a smaller sensor. For example, a 1/3” image sensor will produce a better image than a 1/4 ” sensor.Type – There are 2 types of image sensor. CMOS sensors are mass-produced and used in entry-level cameras to provide cost savings. CCD sensors are used in professional CCTV cameras and provide a higher quality image.It is important to remember that the quality of the recorder also influences the quality of the CCTV footage. For example, if you use a high-resolution camera but a low-resolution recorder then the CCTV footage that is captured will still be of low resolution.1.8 Single Camera or Multiple Camera SystemsDo you need to protect and view a single area or multiple areas? If you are likely to require protection of additional areas at a future date then consider buying a system that can be expanded as and when required. Voltek has a range of products that will allow you to connect and use up to 4, 8 or even 16 cameras. These include:Switchers - These are units that enable a multi-camera system to switch between the various cameras. The switching can be done in a number of ways:* Manually by the user* Automatic sequential switching between cameras* Upon detection of movement by a PIR camera.Multiple Security CCTV cameras with Switchers The cameras are connected to the switcher and the output from the switcher can be viewed on a TV or it can be connected directly to the recording device such as the VCR or DVD recorder. CCTV switchers can typically allow connection of upto 4 or 8 cameras. The Spectrum control units from Voltek also have additional built-in functionality such as automatic video activation and time and date stamp. It is important to remember however that using a switcher will only allow you to view and record one camera at a time.Standalone DVRs - Use of digital video recorders allows single or multi-camera systems to be viewed and / or recorded simultaneously.Voltek supplies a range of 4, 8 and 16 channel DVRs allowing you to install a very comprehensive cctv system.PC-Based Security Systems - These make use of a PCI card that is fitted inside your computer. They will allow connection of upto 4, 8 or 16 cameras and help turn your existing PC into a sophisticated cctv system.2.0 Recording OptionsIf you want to be able to record your CCTV footage then the following factors need to be taken into account:* Maximum length of recording time required* Quality of recording* Method of recording:o Continuouso Manualo Event Led - i.e. when your system detects motion * Recording Equipmento Analogueo Digital * Capability for storage, retrieval and transfer of cctv footage2.1 Domestic VCRThis is a simple and low cost option that can provide good quality footage recorded in real time. VCRs can be used to provide continuous recording of up-to 8 hours or event led recording when used in conjunction with a PIR camera and a VCR activator. When using PIR cameras to carry out event led recordings you need to consider the start-up time for the VCR. For example, if the recorder takes a few seconds to actually begin recording each time it receives the signal from the camera then the event may have elapsed before it is recorded (a person walking across the camera range may have passed the field of view before the image is captured on tape). In these situations a separate PIR detector could be used to trigger the recording and overcome this problem. The other thing to bear in mind is that you cannot set the VCR to record a TV channel whilst the camera input is selected.2.2 Domestic DVD RecorderThese operate on a similar principle to the domestic VCR but offer the additional benefits of:* Higher quality digital recording* Increased storage capacity* Improved search and retrieval capability However, for disk only recorders the start-up time before recording actually commences is generally longer than a VCR. To overcome this it is recommended that recorders with a built-in hard drive are used2.3 Standalone Digital Video RecordersThese are rapidly becoming the most popular method of recording CCTV footage. Essentially a DVR is a standalone piece of hardware that is designed exclusively for recording CCTV footage. It has a number ofDigital Security camera recorders clear advantages over the traditional analogue systems and these include:* Storage Capacity – Days, weeks and even months of high resolution recording is possible through use of large capacity hard drives* Consistent Quality Recording – No deterioration of image quality no matter how many you overwrite onto the recording device or how long you store the images for* Viewing and Retrieval – Quick and easy access of footage due to digital format* Transfer and Storage – The digital format allows ease of transfer and storage of footage. Transfer and storage capability is further enhanced by DVRs with built-in CD writers and USB ports.* Remote Access – Many DVRs have the capability for remote access from anywhere in the world through use of a remote PC* Multiplexed Recording – Capability to view and record multiple cameras simultaneously. 2.4 PCI CardsThese are digital video capture cards that can be fitted inside your existing PC to allow the connection of multiple CCTV cameras. The functionality and benefits of PCI cards is very similar to that of DVRs.3.0 DetectionEven with systems that have a very long recording capacity, it is not always desirable to record continuously. Event-led recording is a more efficient means of capturing relevant footage and can be achieved by:3.1 PIR Movement DetectorsSome cameras have PIR detectors built-in and for those that don’t it is possible to install a separate PIR as part of the overall system. In multiple camera systems with PIRs the footage that is being displayed on screen will automatically change to the area that has detected movement.3.2 Video Motion DetectionThis is used in digital CCTV systems and works by analysing the video signal from a camera. Changes in signal are recognised as movement and subsequently used to trigger recording if required. All Voltek digital systems allow users to mark one or more rectangular areas within the display screen and only when motion is detected within these areas will the system begin recording. Where possible, use of PIR movement detection is preferable rather than video motion detection, as it more reliable particularly for external use.4.0 Time and Date StampingThis feature superimposes the time and date onto your CCTV footage. Having this feature can be really useful to identify when an event occurred and was recorded, particularly if the footage is to be used for evidence purposes. For domestic systems Voltek offers a separate time and date generator that can be added to your system. The Spectrum control CCTV securyty cameras has this facility already built-in. The facility is also integral to all the Voltek range of digital CCTV systems.5.0 Cable and ConnectorsSecurity camera wires connectors Cameras can be connected in a variety of ways. All our domestic cameras are supplied with 20m of cable and scart and / or phono plugs to connect directly into your TV, VCR or DVD recorder. All our professional cameras are supplied with 20m of cable and BNC connectors that will plug into our range of digital recorders. The Voltek camera leads can be extended upto 100m in total by the use of appropriate extension leads. Co-axial cable with a local power supply to the camera can enable the camera to be sited upto 250m away from the monitor or recording device. Detailed information on connectors and cable for each of the Voltek cameras is available on the relevant product page on the website.6.0 Camera ProtectionIf your camera is likely to be a target for vandals then consider protecting it with one of Voltel wire cages is a Security camera wire cagesmust. This not only saves your Security cameras from Vandalas but protects any evidences collected during the vandal acts.We at For your Home along with Voltek really hope the following guide will help you in selecting the perfect security cameras for Your Homes and Gardens
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CCTV: Closed Circuit Television


Closed Circuit Television (CCTV) is an installation of directly connected components creating a circuit which cannot be viewed by anybody outside of the circuit.
This is different to a terrestrial television broadcast system which anybody with an antenna and reception equipment can view.
Who needs a CCTV system?
CCTV systems can be found virtually everywhere in these days. They are no longer considered an expensive luxury item, especially when you consider your increased level of security.
CCTV systems can be found in both the private and commercial sector and are used for security/ crime prevention purposes and providing Health and Safety protection to the members of the general public.
You will have seen CCTV systems operating in town centres, football stadiums, high street shops, sports centres, petrol stations, on public transport - the list is endless.
A CCTV system is a proven method of increasing the level of security of your premises. Its visual appearance alone will deter a criminal from approaching or entering your property for fear of being captured and identified on the system.
CCTV solutions can be tailor made to suit individual requirements. They can be as simple as one camera and a monitor, but it is quite common to have multiple cameras/monitors and recording devices in one installation.
The Elements of a CCTV System
There are three basic elements to a CCTV system,
1. Camera 2. Lens 3. Monitor unit
The camera is the element which captures the image and transmits the picture back to a monitor. The camera needs a lens to be able to focus on the subject. There are a wide variety of lenses to suit different applications.
The monitor is the receiver unit which converts the captured image into a picture, allowing you to see it.
Colour or Monochrome?
This is a very common question, but ultimately only you can decide.
A CCTV system should be designed to suit your needs, to fit into the environment on your property. The installing company should provide guidance on the suitability of different options, features and benefits - including colour and monochrome units. It may be that you need a camera that will work in colour during the day and automatically switch to monochrome at night!
Recording
As circumstances don't normally permit the luxury of having a dedicated person to sit and watch a monitor 24 hours a day, the image captured by the camera needs to be recorded so that it can be viewed later, if necessary.
Traditionally, this was done with a time lapse Video Cassette Recorder (VCR) which worked on the same principle as a domestic video but with the ability to record for a much longer period of time.
However, the VCR has now been superseded by the digital Hard Disk Recorder (HDR). Rather than using tapes, the HDR stores the images on to a hard disk drive similar to the way a home computer stores data. More than one camera?! Most systems today comprise of more than one camera, but you don't; a monitor and recorder for each camera. Equipment is available that will split the monitor into four separate screens displaying four cameras, or a four way sequence unit can be used which allows you to choose which camera you would like to view. Alternatively, the automatic mode it will sequence through the four cameras that are connected. However, the most common way of controlling multiple cameras is via a multiplexer. To keep it simple, a multiplexer incorporates the above facilities but also has the ability to individually code mark each image from each camera and because of this, a multiplexer allows all of the cameras on a system to be recorded onto one tape or hard drive unit. The multiplexer then uses these code marks to play back the recorded picture from the camera that you wish to view. Historically multiplexers and recording units were separate pieces of equipment, but recently a number of manufactures have developed units that do both jobs.
I want......I need....... These days, a CCTV system can be designed to fit any scenario you care to imagine, using options from the vast range of equipment available from manufactures worldwide. For example, cameras can be internal, external, highly visible or covert. They can be static or fully controllable/movable from a remote location. You can have one camera or hundreds; you can record for one day or 21 days. With a suitable internet connection, you can even view your property when you are abroad. Get the picture??!!!
Quality Counts. Although an avid DIY-er can buy equipment that claims to be a CCTV system from their local store, and electrical companies have jumped onto the CCTV bandwagon and will install systems too, it is always advisable to seek the advice of a specialist company. Why? In around 70% of cases, CCTV footage is found to be inadmissible as evidence in a Court of Law because the quality of the evidence is considered inadequate. This can result from the poor design and bad installation of the system and highlights the importance to seek professional advice from the outset Only a specialist company who are professional in their approach and can demonstrate experience in design and installation should be approached. Most importantly, you must feel confident that the company you choose will listen to and understand your individual CCTV requirements. Their experience with lens optics and camera technology will guarantee you satisfaction with your system.
A specialist company will also ensure the best value for money, for example by using a different lens or camera mounting positions which can not only monitor the area at risk but also give an outline view of the surrounding area at the same time.
Data protection A CCTV system must be registered in order to comply with the data protection act of 1998. Since 24 October 2001, it has been a criminal offence to have an unregistered CCTV system that records people in a public or a private place (conditions apply). The Code of Practice contains legally enforceable 'Standards' that must be met to ensure compliance with the Data Protection Act 1998. There are also a further 30 points of good working practice which, when used in conjunction with the Standards, are designed to build and maintain public confidence in CCTV systems and to ensure that installers and users operate within the law. The Code of Practice is available for you to view at www.dataprotection.gov.uk.

Home Security- CCTV

CCTV is an important instrument for secure homes and business places. CCTV is the abbreviation of Closed Circuit Television, which is used to monitor certain areas and help to protect it from burglars and thieves. The monitor is a key aspect to the video surveillance setup, and will feed the video from the cameras that make up the system. The monitors are normally black and white and feature a higher resolution than that of a standard television set.
As the name implies, Closed Circuit Television (CCTV) is a system in which the circuit is closed and all the elements are directly connected. This is unlike broadcast television where any receiver that is correctly tuned can pick up the signal from the airwaves. Directly connected in this context includes systems linked by microwave, infrared beams, etc. This article introduces the main components that can go to make up CCTV systems of varying complexity. Closed circuit video magnification systems are capable of higher levels of magnification and can manipulate the brightness and contrast of the image.
CCTV is the use of video cameras to send out a signal to a specific, small set of monitors. Many stores use CCTV as a theft prevention deterrent. CCTV is used in a wide range of areas where large amounts of people gather. It is also used in areas where security is very important. Many factories use CCTV to keep track of entrances and exits. CCTV is different from broadcast television due to the fact that the signal is not openly transmitted. CCTV is widely used for surveillance. It is generally used in areas that need heightened security. Banks, casinos, and airports and military installations often use CCTV in addition to security patrols. CCTV allows these areas to employ less security officers and still have a high security level. Many, if not all, CCTV systems make images to be recorded. These recordings can be used in case of any theft, security breaches or other incident. In a number of large industrial factories, CCTV equipment is often used to watch parts of the factory from a control room. Often CCTV allows workers to view areas where the environment is not safe for humans to work. Many factories that deal with hazardous materials installing closed-circuit television in order to keep workers safe. CCTV systems may operate non-stop or only as required to monitor a particular event or during business hours. It has become essential for CCTV to truly be closed. The use of CCTV continues as a result of the need to meet the terms of data protection laws and human rights. In a wide number of countries, CCTV legislation dictates that many of these surveillance systems must also supply any member of the public, with a legitimate reason, with copies of any recordings. A closed-circuit television used for surveillance may deter crime by being "a closed circuit" but it is also essential to watch over the public to keep these systems from being used for improper purposes. Large companies now perform closed-circuit television and video surveillance across a number of platforms. Many times these companies often use securely linked closed-circuit television systems that are connected to a central monitoring and recording facility over the Internet.