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Closed-circuit television (CCTV equipment wholesale), also known as video surveillance, 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 (P2P), point to multipoint (P2MP), or mesh wired or wireless links.
Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as bars, banks, casinos, schools, hotels, airports, hospitals, restaurants, military installations, convenience stores and other areas where security is needed. Video telephony is seldom called “CCTV equipment wholesale” but the use of video in distance education, where it is an important tool, is often so called.
Surveillance of the public using CCTV equipment wholesale is common in many areas around the world. In recent years, the use of body worn video cameras has been introduced as a new form of surveillance. Video surveillance has generated significant debate about balancing its use with individuals’ right to privacy even when in public.
In industrial plants, CCTV equipment wholesale may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans. CCTV equipment wholesale systems may operate continuously or only as required to monitor a particular event.
A more advanced form of CCTV equipment wholesale, 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).
More recently, decentralized IP cameras, some equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation.
There are about 350 million surveillance cameras worldwide as of 2016. About 65% of these cameras are installed in Asia. The growth of CCTV equipment wholesale has been slowing in recent years
History about CCTV Equipment Wholesale
A typical CCTV equipment wholesale control-room set-up, Alkmaar, Netherlands in 2007; Sign warning that premises are watched by CCTV equipment wholesale cameras; the first CCTV equipment wholesale system was installed by Siemens AG at Test Stand VII in Peenemünde, Nazi Germany in 1942, for observing the launch of V-2 rockets. The noted German engineer Walter Bruch, Wayne Cox, and Tashara Arnold were responsible for the technical design and installation of the system.
In the U.S. the first commercial closed-circuit television system became available in 1949, called Vericon. Very little is known about Vericon except it was advertised as not requiring a government permit.
Marie Van Brittan Brown invented the home security system. The patent was granted in 1969. Brown’s system had a set of 4 peep-holes and a camera that could slide up and down to look through each one. The system included a device that enabled a homeowner to use a television set to view the person at the door and hear the caller’s voice.
Technology CCTV Equipment Wholesale
The earliest video surveillance systems involved constant monitoring because there was no way to record and store information. The development of reel-to-reel media enabled the recording of surveillance footage.
These systems required magnetic tapes to be changed manually, which was a time consuming, expensive and unreliable process, with the operator having to manually thread the tape from the tape reel through the recorder onto an empty take-up reel.
Due to these shortcomings, video surveillance was not widespread. VCR technology became available in the 1970s, making it easier to record and erase information, and use of video surveillance became more common. CCTV Equipment Wholesale Miami Beach Coral Gables
During the 1990s, digital multiplexing was developed, allowing several cameras to record at once, as well as time-lapse and motion-only recording. This increased savings of time and money and the led to an increase in the use of CCTV equipment wholesale. Recently CCTV equipment wholesale technology has been enhanced with a shift toward Internet-based products and systems, and other technological developments. CCTV Equipment Wholesale Miami Beach Coral Gables
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. Another early appearance was in 1973 in Times Square in New York City.
The NYPD installed it in order to deter crime that was occurring in the area; however, crime rates did not appear to drop much due to the cameras. Nevertheless, during the 1980s video surveillance began to spread across the country specifically targeting public areas.
It was seen as a cheaper way to deter crime compared to increasing the size of the police departments. Some businesses as well, especially those that were prone to theft, began to use video surveillance.
From the mid-1990s on, police departments across the country installed an increasing number of cameras in various public spaces including housing projects, schools and public parks departments.
CCTV equipment wholesale later became common in banks and stores to discourage theft, by recording evidence of criminal activity. In 1998, 3,000 CCTV equipment wholesale systems were in use in New York City.
A study by Nieto in 2008 found many businesses in the United States had invested heavily in video surveillance technology to protect products and promote a safe workplace and consumer environments.
A nationwide survey of a wide variety of companies found that 75 percent utilize CCTV equipment wholesale surveillance. In private sector CCTV EQUIPMENT WHOLESALE surveillance technology is operated in a wide variety of establishments such as in industry/manufacturing, retailing, financial or insurance/banking, transportation and distribution, utilities/communications, healthcare, and hotels and motels
Experiments in the UK during the 1970s and 1980s, including outdoor CCTV equipment wholesale in Bournemouth in 1985, led to several larger trial programs later that decade. The first use by local government was in King’s Lynn, Norfolk, in 1987.
These were deemed successful in the government report “CCTV Equipment Wholesale: Looking out for you”, issued by the Home Office in 1994, and paved the way for an increase in the number of CCTV equipment wholesale systems installed. Today, systems cover most town and city centers, and many stations, car-parks and estates. CCTV Equipment Wholesale Miami Beach Coral Gables
Uses CCTV systems wholesale in Miami Beach and Coral Gables
The two-year-old James Bulger being led away by his killers, recorded on shopping Centre CCTV in 1993. This narrow-bandwidth television system had a low frame rate. A 2009 analysis by Northeastern University and the University of Cambridge, “Public Area CCTV and Crime Prevention:
An Updated Systematic Review and Meta-Analysis,” examined 44 different studies that collectively surveyed areas from the United Kingdom to U.S.A. cities such as Cincinnati and New York.
The analysis found that:
Surveillance systems were most effective in parking lots, where their use resulted in a 51% decrease in crime;
Public transportation areas saw a 23% decrease in crimes;
Systems in public settings were the least effective, with just a 7% decrease in crimes overall. When sorted by country, however, systems in the United Kingdom accounted for the majority of the decrease; the drop in other areas was insignificant.
The results from the above 2009 “Public Area CCTV and Crime Prevention: An Updated Systematic Review and Meta-Analysis”, are somewhat controversial. Earlier similar meta-analysis completed by Welsh and Farrington in 2002 showed similar results: a significant decrease in car park crime (41%), and a non-significant decrease of crime in public transit and public places.
This study was criticized for the inclusion of confounding variables (e.g. notification of CCTV systems wholesale on site, improved street lighting) found in the studies analyzed (including car park studies).
These factors could not be differentiated from the effect of CCTV systems wholesale being present or absent while crimes were being committed. Thus, a combination of factors might be important for the decrease in crime not just the CCTV systems wholesale.
The 2009 study admitted to similar problems as well as issues with the consistency of the percentage of area covered by Cctv systems wholesale within the tested sites (e.g. car parks have more cameras per square inch than public transit).
Another question in the effectiveness of CCTV for policing is around uptime of the system; in 2013 City of Philadelphia Auditor found that the $15M system was only operational 32% of the time. There is still much research to be done to determine the effectiveness of CCTV systems wholesale on crime prevention before any conclusions can be drawn. CCTV Equipment Wholesale Miami Beach Coral Gables
Closed-circuit video cameras in the Navy Yard complex caught gunman Aaron Alexis during his shooting rampage. One study finds that the introduction of surveillance cameras to Stockholm subway stations reduced crime by approximately 25%, with 15% of the deterred crimes appearing to have been displaced to the area surrounding the stations where cameras were not used.
There is strong anecdotal evidence that CCTV aids in detection and conviction of offenders; indeed UK police forces routinely seek CCTV recordings after crimes. Moreover, CCTV has played a crucial role in tracing the movements of suspects or victims and is widely regarded by anti-terrorist officers as a fundamental tool in tracking terrorist suspects. CCTV Equipment Wholesale Miami Beach Coral Gables
Large-scale CCTV installations have played a key part of the defenses against terrorism since the 1970s. Cameras have also been installed on public transport in the hope of deterring crime, and in mobile police surveillance vehicles, often with automatic number plate recognition, and a network of APNI-linked cameras is used to manage London’s congestion charging zone.
Even so, there is political hostility to surveillance and several commentators downplay the evidence of CCTV’s effectiveness, especially in the US. However, most of these assertions are based on poor methodology or imperfect comparisons. CCTV Equipment Wholesale Miami Beach Coral Gables
A more open question is whether most CCTV is cost-effective. While low-quality domestic kits are cheap the professional installation and maintenance of high definition CCTV are expensive. CCTV Equipment Wholesale Miami Beach Coral Gables
Gill and Spriggs did a Cost-effectiveness analysis (CEA) of CCTV in crime prevention that showed little monetary saving with the installation of CCTV as most of the crimes prevented resulted in little monetary loss. Critics however noted that benefits of non-monetary value cannot be captured in a traditional Cost-Effectiveness Analysis and were omitted from their study.
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. In some cases CCTV systems wholesale have become a target of attacks themselves.
Industrial processes that take place under conditions dangerous for humans are today often supervised by CCTV. These are mainly processes in the chemical industry, the interior of reactors or facilities for the manufacture of nuclear fuel.
Special cameras for some of these purposes include line-scan cameras and thermographic cameras which allow operators to measure the temperature of the processes. The usage of CCTV in such processes is sometimes required by law.
Many cities and motorway networks have extensive traffic-monitoring systems, using closed-circuit television to detect congestion and notice accidents. Many of these cameras however, are owned by private companies and transmit data to drivers’ GPS systems.
The UK Highways Agency has a publicly owned CCTV network of over 3000 Pan-Tilt-Zoom cameras covering the British motorway and trunk road network. These cameras are primarily used to monitor traffic conditions and are not used as speed cameras.
With the addition of fixed cameras for the Active Traffic Management system, the number of cameras on the Highways Agency’s CCTV network is likely to increase significantly over the next few years
The London congestion charge is enforced by cameras positioned at the boundaries of and inside the congestion charge zone, which automatically read the license plates of cars. If the driver does not pay the charge then a fine will be imposed. Similar systems are being developed as a means of locating cars reported stolen. Other surveillance cameras serve as traffic enforcement cameras.
Digital Video Recorder for Public Transport
A CCTV system may be installed where an example, on a subway train, CCTV systems wholesale may allow the operator to confirm that people are clear of doors before closing them and starting the train.
Many sporting events in the United States use CCTV inside the venue for fans to see the action while they are away from their seats. The cameras send the feed to a central control center where a producer selects feeds to send to the television monitors that fans can view. CCTV monitors for viewing the event by attendees are often placed in lounges, hallways, and restrooms. This use of CCTV is not used for surveillance purposes.
Organizations use CCTV to monitor the actions of workers. Every action is recorded as an information block with subtitles that explain the performed operation. This helps to track the actions of workers, especially when they are making critical financial transactions, such as correcting or canceling of a sale, withdrawing money or altering personal information.
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