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Closed-circuit television (CCTV), also known as video surveillance, [1] [2] is the use of closed-circuit television 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 , point-to-multipoint (P2MP), or ...
HDcctv (High Definition Closed Circuit Television) is an open industrial standard for transmitting uncompressed high-definition analog (AHD) or digital video over point-to-point coaxial cable links for video surveillance applications. [1] [2] [3] HDcctv uses the SMPTE HD-SDI protocol and can transmit 720p or 1080p video over at least 100 m of ...
The term "closed-circuit television" indicates that the video feed is only accessible to a limited number of people or devices with authorized access. Cameras can be either analog or digital. [1] Walter Bruch was the inventor of the CCTV camera. [2]
Closed-Circuit Television Video primarily used for surveillance and security that is not broadcast to the general public. CMOS (complementary metal–oxide–semiconductor) A technology used to make computer chips and some digital camera sensors. C-Mount The first standard for CCTV lens screw mounting.
Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.
ZoneMinder is a free, open-source software application for monitoring via closed-circuit television - developed to run under Linux and FreeBSD and released under the terms of the GNU General Public License (GPL). Users control ZoneMinder via a web-based interface.
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The vast majority of computer surveillance involves the monitoring of data and traffic on the Internet. [9] In the United States for example, under the Communications Assistance For Law Enforcement Act, all phone calls and broadband Internet traffic (emails, web traffic, instant messaging, etc.) are required to be available for unimpeded real-time monitoring by federal law enforcement agencies.