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  2. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    The system is used by Chicago's Office of Emergency Management in case of an emergency call: it detects the caller's location and instantly displays the real-time video feed of the nearest security camera to the operator, not requiring any user intervention. While the system is far too vast to allow complete real-time monitoring, it stores the ...

  3. Closed-circuit television camera - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television...

    These cameras do not require a video capture card because they work using a digital signal which can be saved directly to a computer. The signal is compressed 5:1, but DVD quality can be achieved with more compression (MPEG-2 is standard for DVD-video, and has a higher compression ratio than 5:1, with a slightly lower video quality than 5:1 at best, and is adjustable for the amount of space to ...

  4. Home security - Wikipedia

    en.wikipedia.org/wiki/Home_security

    Current cameras feature abilities such as motion detection and two-way audio, allowing users to receive notifications of activity and speak and listen through the camera. Home surveillance cameras used for security purposes have become more accessible, but have sparked security concerns from consumers. [10]

  5. Surveillance - Wikipedia

    en.wikipedia.org/wiki/Surveillance

    A surveillance camera in Cairns, Queensland Surveillance cameras such as these are installed by the millions in many countries, and are nowadays monitored by automated computer programs instead of humans. Surveillance cameras, or security cameras, are video cameras used for the purpose of observing an area.

  6. IP camera - Wikipedia

    en.wikipedia.org/wiki/IP_camera

    An Internet Protocol camera, or IP camera, is a type of digital video camera that receives control data and sends image data via an IP network.They are commonly used for surveillance, but, unlike analog closed-circuit television (CCTV) cameras, they require no local recording device, only a local area network.

  7. A three-judge panel of the appeals court found that the officers who had identified Belnavis using surveillance cameras did not have "sufficient relevant familiarity" with him to make a convincing ...