Surveillance DVRs


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Closed-circuit television (CCTV), also known as video surveillance is the use of video 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 (P2P), point-to-multipoint (P2MP), or mesh wired or wireless links. Even though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that require additional security or ongoing monitoring.

CCTV is a video system in which specifically placed cameras record video images and transmit these to a monitor/monitors, with only a small number of people being able to access it. It is also system that are primarily used for security, monitoring and surveillance purposes. In terms of security, CCTV can be used to monitor both public and property security. It allows you to keep an eye on what’s going on in and around your you, cameras and monitors enable you to view events live, and recorders archive footage for later reference.
Don’t mistake a CCTV monitor for an ordinary television. It doesn’t receive publicly broadcasted content—only footage from security cameras installed on the premises, this technology has been around for decades, but improvements in recent years make it even more effective at capturing criminals in the act and bringing them to justice. Consider the various parts of a CCTV system and how they all work together.

DVR Means Digital Video Recorders. DVR records security footage that your CCTV security camera captures, allowing you to watch it back when you need to. This is paramount to site security. In the case of a security threat or criminal attack, a DVR system will ensure you’ve got security footage as proof, and it will also enable you to identify the assailant. In fact, businesses of all sizes should make a habit of regularly backing up their data, as it safeguards you in the event of physical damage or theft.

A DVR converts analog footage into a digital format, while an NVR typically only works with digital footage. DVR systems process data at the recorder, while NVR systems encode and process data at the camera before transmitting it to the recorder for storage and remote viewing.

Video on a DVR is encoded and processed at the DVR, while video on an NVR is encoded and processed at the camera, then streamed to the NVR for storage or remote viewing, additional processing may be done at the NVR, such as further compression or tagging with meta data.

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