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  2. Wireless security camera - Wikipedia

    en.wikipedia.org/wiki/Wireless_security_camera

    Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio. However, some wireless security cameras are battery-powered ...

  3. Network video recorder - Wikipedia

    en.wikipedia.org/wiki/Network_Video_Recorder

    A network video recorder (NVR) is a specialized computer system that records video [1] to a disk drive, USB flash drive, memory card, or other mass storage device. An NVR itself contains no cameras, but connects to them through a network, typically as part of an IP video surveillance system. NVRs typically have embedded operating systems.

  4. Digital video recorder - Wikipedia

    en.wikipedia.org/wiki/Digital_video_recorder

    A DVR CCTV system provides a multitude of advanced functions over VCR technology including video searches by event, time, date and camera. There is also much more control over quality and frame rate allowing disk space usage to be optimized and the DVR can also be set to overwrite the oldest security footage should the disk become full.

  5. IP camera - Wikipedia

    en.wikipedia.org/wiki/IP_camera

    Connection. Ethernet, Wi-Fi. 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.

  6. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    Surveillance cameras on the corner of a building. Surveillance camera in a residential community. 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 ...

  7. Dahua Technology - Wikipedia

    en.wikipedia.org/wiki/Dahua_Technology

    Website. www.dahuasecurity.com. Zhejiang Dahua Technology Co., Ltd. (commonly known as Dahua Technology) is a publicly traded company based in Binjiang District, Hangzhou, which manufactures video surveillance equipment. [4] A minority of Dahua is state-owned (11.67% as of 2023).

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