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Closed-circuit television (CCTV), also known as video surveillance,[1][2] 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. Even though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that require additional security or ongoing monitoring (Videotelephony is seldom called "CCTV"[3][4]).
Surveillance of the public using CCTV is common in many areas around the world. Video surveillance has generated significant debate about balancing its use with individuals' right to privacy even when in public.[5][6][7]
In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, especially if the environments observed are dangerous or inaccessible to humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, using 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, perhaps equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation.
By one estimate, there will be approximately 1 billion surveillance cameras in use worldwide by 2021.[8][needs update] About 65% of these cameras are installed in Asia. The growth of CCTV has been slowing in recent years.[9][unreliable source?] The deployment of this technology has facilitated significant growth in state surveillance, a substantial rise in the methods of advanced social monitoring and control, and a host of crime prevention measures throughout the world.[10]
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms.
Some alarm systems serve a single purpose of burglary protection; combination systems provide fire and intrusion protection. Intrusion-alarm systems are combined with closed-circuit television surveillance (CCTV) systems to record intruders' activities and interface to access control systems for electrically locked doors. There are many types of security systems. Homeowners typically have small, self-contained noisemakers. These devices can also be complicated, multirole systems with computer monitoring and control. It may even include a two-way voice which allows communication between the panel and monitoring station.
Hampshire (/ˈhæmpʃər/, /-ʃɪər/ (listen); abbreviated to Hants)[a] is a county in South East England on the coast of the English Channel, bordering Dorset to the south-west, Wiltshire to the north-west, Berkshire to the north, Surrey to the north-east and West Sussex to the south east. The county town is Winchester, but the county is named after Southampton. Its two largest cities are Southampton and Portsmouth which are administered separately as unitary authorities; the rest of the county is governed by a combination of the Hampshire County Council and non-metropolitan district councils.
First settled about 14,000 years ago, Hampshire's recorded history dates to Roman Britain, when its chief town was Winchester, then known as Venta Belgarum. The county was recorded in the 11th century Domesday Book, divided into 44 hundreds. From the 12th century, the ports grew in importance, fuelled by trade with the continent, wool and cloth manufacture, fishing and large shipbuilding industries. By the 16th century, the population of Southampton had outstripped that of Winchester. By the mid-19th century, the population was 219,210, double that at the beginning of the century, in more than 86,000 dwellings. Agriculture was the principal industry and 10 per cent of the county was still forest. Hampshire played a crucial military role in both World Wars. The borders of the ceremonial county were created by the Local Government Act 1972 (enacted 1974). Historically part of Hampshire, the Isle of Wight was made a separate ceremonial county and the towns of Bournemouth and Christchurch were administered as part of the ceremonial county of Dorset.
The geography of the county is varied, with upland rising to 286 m (938 ft) and mostly south-flowing rivers. There are areas of downland and marsh, and two national parks: the New Forest and part of the South Downs, which together cover 45 per cent of Hampshire.
Hampshire is one of the most affluent counties in the country, with an unemployment rate lower than the national average. Its economy mainly derives from major companies, maritime, agriculture and tourism. Tourist attractions include seaside resorts, national parks, the National Motor Museum and the Southampton Boat Show. The county is known as the home of writers Jane Austen and Charles Dickens. Hampshire is also the childhood home of Florence Nightingale and the birthplace of engineer Isambard Kingdom Brunel.
