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  2. Video management system - Wikipedia

    en.wikipedia.org/wiki/Video_management_system

    A feature of some newer VMS is the capability to show multiple camera views from a single recorded stream. This utilizes digital PTZ of high megapixel cameras, and may also be referred to as client-side dewarping for fisheye cameras. A single camera with a very wide or high resolution field of view is capable of covering two or more areas of ...

  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. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    Fixed cameras' resolution typically does not exceed 20 megapixels. The main feature of a PTZ is its remote directional and optical zoom capability. With multi-sensor cameras, wider areas can be monitored. Industrial video surveillance systems use network video recorders to support IP cameras. These devices are responsible for the recording ...

  5. Digital video recorder - Wikipedia

    en.wikipedia.org/wiki/Digital_video_recorder

    A digital video recorder (DVR), also referred to as a personal video recorder (PVR) particularly in Canadian and British English, is an electronic device that records video in a digital format to a disk drive, USB flash drive, SD memory card, SSD or other local or networked mass storage device.

  6. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    When a signal is received, a trained monitoring professional accesses the on-site digital video recorder (DVR) through an IP link to determine the cause of the activation. For this type of system, the camera input to the DVR reflects the alarm panel's zones and partitioning, which allows personnel to look for an alarm source in multiple areas.

  7. IP camera - Wikipedia

    en.wikipedia.org/wiki/IP_camera

    The first centralized IP camera, the AXIS Neteye 200, was released in 1996 by Axis Communications. [3] Although the product was advertised to be accessible from anywhere with an internet connection, [4] the camera was not capable of streaming real-time video, and was limited to returning a single image for each request in the Common Intermediate Format (CIF).

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