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What is the difference between DVR and NVR?
Let us understand what a digital video recorder DVR is.
DVR
DVR stands for Digital Video Recorder. It is a recording device that records video in a digital structure and saves it on hard drives instead of videotapes. It needed video signals to be digitized and compressed to save as many days’ worth of video feed as available.
Security systems using DVRs play an important role in alarm verification and security assessment. The digital video images are saved on hard disks similar to those used in the PCs and have storage areas calculated in gigabytes. It provides a cheap but efficient technique for saving compressed video files. It is generally used to record analog or coax-based cameras.
Components of DVR Systems
There are various components of DVR systems which are as follows −
Analog Cameras
The DVR system uses analog cameras. The camera is answerable for streaming an analog signal to the recorder, which then processes the video information. Unlike NVRs, some DVR cameras are less costly.
Coaxial Cables
The coaxial cables attach the analog camera to the DVR system. The use of a coaxial cable cannot seem significant because of its limitations; however, ultimately data is shared over this cable type. Coaxial cable does not provide power supplying devices on the equivalent line.
Therefore, another cable is required to transfer electrical signals, while the other cable transmits data signals for video transmission. These cables are inflexible and larger than Ethernet cables, creating installation a challenge. Audio is a limitation as the standard coaxial cable cannot provide audio transmission.
AD Encoder
DVR recorders heavily depend on AD encoders, which are responsible for processing the raw information streaming from the camera into visible footage. Therefore, each camera in this security system is required to be attached to both the recorder and an independent power source.
NVR
NVR stands for Network Video Recorder. It is an electronic recording device that uses digital or analog cameras transformed into IP cameras using a network server. The digital data is created to a network in consent with the TCP/IP transport protocol and documented by an NVR.
It is a self-included system that involves the computer, software, storage, and a multiport Power over Ethernet (PoE) transform in one unit. NVRs are plug-and-play devices equal to DVRs, except they are used with IP cameras rather than analog cameras.
The Network Video Recorder receives, saves, and handles digital video streams shared by IP cameras over the network. The NVR enables us to watch, browse, playback, manage, and save multiple IP cameras simultaneously.
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