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Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.

It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point wireless links. CCTV is often used for surveillance in areas that may need monitoring such as banks, casinos, airports, military installations, and convenience stores. It is also an important tool of distance education.

In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room; when, for example, the environment is not suitable for humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing Digital Video Recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion-detection and email alerts).

Surveillance of the public using CCTV is particularly common in the UK, where there are reportedly more cameras per person than in any other country in the world.[1] There and elsewhere, its increasing use has triggered a debate about security versus privacy.

The first CCTV system was installed by Siemens AG at Test Stand VII in Peenemünde, Germany in 1942, for observing the launch of V-2 rockets.[2] The noted German engineer Walter Bruch was responsible for the design and installation of the system.

CCTV recording systems are still often used at modern launch sites to record the flight of the rockets, in order to find the possible causes of malfunctions,[3][4] while larger rockets are often fitted with CCTV allowing pictures of stage separation to be transmitted back to earth by radio link.[5]

In September 1968, Olean, New York was the first city in the United States to install video cameras along its main business street in an effort to fight crime.[citation needed] The use of closed-circuit TV cameras piping images into the Olean Police Department propelled Olean to the forefront of crime-fighting technology.

The use of CCTV later on became very common in banks and stores to discourage theft, by recording evidence of criminal activity. Their use further popularised the concept. The first place to use CCTV in the United Kingdom was King's Lynn, Norfolk.[6]

In recent decades, especially with general crime fears growing in the 1990s and 2000s, public space use of surveillance cameras has taken off, especially in some countries such as the United Kingdom. [edit] Uses [edit] Crime prevention and prevalence in the UK The two-year-old James Bulger being led away by his killers, recorded on shopping centre CCTV

Outside government special facilities, CCTV was developed initially as a means of increasing security in banks. Experiments in the UK during the 1970s and 1980s (including outdoor CCTV in Bournemouth in 1985), led to several larger trial programs later that decade.[6]

These were deemed successful in the government report "CCTV: Looking Out For You", issued by the Home Office in 1994, and paved the way for a massive increase in the number of CCTV systems installed. Today, systems cover most town and city centres, and many stations, car-parks and estates.

The exact number of CCTV cameras in the UK is not known but a 2002 working paper by Michael McCahill and Clive Norris of UrbanEye,based on a small sample in Putney High Street, estimated the number of surveillance cameras in private premises in London is around 500,000 and the total number of cameras in the UK is around 4,200,000. Research conducted by the Scottish Centre for Crime and Justice Research and based on a survey of all Scottish local authorities, identified that there are over 2,200 public space CCTV cameras in Scotland.

According to their estimate the UK has one camera for every 14 people, although it has been acknowledged that the methodology behind this figure is somewhat dubious.[9] The CCTV User Group estimate that there are around 1.5 million CCTV cameras in city centres, stations, airports, major retail areas and so forth. This figure does not include the smaller surveillance systems such as those that may be found in local corner shops.[10]

There is little evidence that CCTV deters crime; in fact, there is considerable evidence that it does not.[11] According to a Liberal Democrat analysis, in London "Police are no more likely to catch offenders in areas with hundreds of cameras than in those with hardly any."] A 2008 Report by UK Police Chiefs concluded that only 3% of crimes were solved by CCTV. In London, a Metropolitan Police report showed that in 2008 only one crime was solved per 1000 cameras. There may be valid reasons for using CCTV in a comprehensive physical security program, but deterrence is not one of them.

Cameras have also been installed on public transport in the hope of deterring crime, and in mobile police surveillance vans, often with automatic number plate recognition. In some cases CCTV cameras have become a target of attacks themselves.

On 22 July 2005, Jean Charles de Menezes was shot dead by police at Stockwell tube station. According to brother Giovani Menezes, "The film showed that Jean did not have suspicious behaviour" .

Because of the bombing attempts the previous day, some of the tapes had been supposedly removed from CCTV cameras for study, and they were not functional.[20] An ongoing change to DVR based technology may in future stop similar problems occurring.[21]

The UK cameras were deployed and are maintained by NEP - Roll to Record, a division of NEP Broadcasting.

In the UK, CCTV is also used to target anti-social behaviour. In many areas, local authority CCTV operators work with the police to combat, for example, drink-related anti-social behaviour in city centres or youth-related anti-social behaviour in housing estates.

In October 2009, an "Internet Eyes" website was announced which would pay members of the public to view CCTV camera images from their homes and report any crimes they witnessed. The site aimed to add "more eyes" to cameras which might be insufficiently monitored, but civil liberties campaigners criticised the idea as "a distasteful and a worrying development".

 

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