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In March 2021, the Federal Communications Commission (FCC) declared that Hikvision services and equipment "pose an unacceptable risk to U.S. national security." [54] After President Joe Biden signed into law the Secure Equipment Act of 2021, in November 2022, the FCC banned sales or import of equipment made by Hikvision for national security ...
Vandal dome-style camera. A closed-circuit television camera is a type of surveillance camera that transmits video signals to a specific set of monitors or video recording devices, rather than broadcasting the video over public airwaves. The term "closed-circuit television" indicates that the video feed is only accessible to a limited number of ...
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 ...
Uncompressed video is digital video that either has never been compressed or was generated by decompressing previously compressed digital video. It is commonly used by video cameras, video monitors, video recording devices (including general-purpose computers), and in video processors that perform functions such as image resizing, image rotation, deinterlacing, and text and graphics overlay.
Recording at the edge. Recording at the edge is the recording of video and storing it either in camera or to a directly connected storage device instead of transporting it across the network to a centralized recording facility such as a digital video recorder . Recording at the edge is a distributed or de-centralized approach to storage—the ...
Simple NVR-based camera system. 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.
Computer data storage or digital data storage is a technology consisting of computer components and recording media that are used to retain digital data. It is a core function and fundamental component of computers. [1]: 15–16 The central processing unit (CPU) of a computer is what manipulates data by performing computations.
In digital images, there is a distinction with the storage aspect ratio (SAR), which is the ratio of numbers of pixels. If an image is displayed with square pixels , then these ratios agree. If, instead, non-square ("rectangular") pixels are used, then these ratios differ.