Surveillance is used by governments for intelligence purposes, prevention of crime, protection of a process, person, group or object or for the investigation of crime.
It is also used by criminal organizations to plan and commit crimes such as robbery and kidnapping, by businesses to gather intelligence, and by private investigators. Surveillance is often a violation of privacy, and is opposed by various civil liberties groups and activists. Liberal democracies have laws which restrict domestic government and private use of surveillance, usually limiting it to circumstances where public safety is at risk. Authoritarian government seldom has any domestic restrictions; and international espionage is common among all types of countries.
In IP video surveillance, existing networks can be used to transmit video signals. This is done by compressing the signals via the network and transmitting. This is saved to the PC or a recorder which when switched on, will display after decompressing it.
It provides high resolution video images with a resolution up to 2 mega pixels. The transmission takes place smoothly and in real-time via a conventional CCTV infrastructure with coaxial cables and avoids conversion to IP video surveillance. HD-SDI combines the analog and digital technology: Megapixels and real-time video surveillance.
They are easy on the budget, easy to install and use as the cameras are simply connected to a recorder using coaxial cables. Signal failure is virtually impossible with these stable analog systems which ensure secure 24-hour surveillance. Analog cameras provide reliable video image data quality.
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