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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.
In 2022, Hikvision was awarded a Chinese government contract to develop software to track "key people" in order to prevent them from entering Beijing. [16] [17] The same year, IPVM also reported that Hikvision has specific alarms in its software to alert Chinese police to "religion, Falun Gong, and various protest activities. [18]
Comparison of DVR software packages. This is a comparison of digital video recorder (DVR), also known as personal video recorder (PVR), software packages. Note: this is may be considered a comparison of DVB software, not all listed packages have recording capabilities.
File transfer: the software allows the user to transfer files between the local and remote computers, from within the client software's user interface. Audio support: the remote control software transfers audio signals across the network and plays the audio through the speakers attached to the local computer.
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.
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.
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 ...
Remote viewing (RV) is the practice of seeking impressions about a distant or unseen subject, purportedly sensing with the mind. [1] A remote viewer is expected to give information about an object, event, person, or location hidden from physical view and separated at some distance. [2] Physicists Russell Targ and Harold Puthoff, parapsychology ...