THE
DIFFERENCE BETWEEN DVR AND NVR
PLUG AND
PLAY
For a long time, including NVR network equipment, with
reason of need to config IP address and complexity of admin management
platform, keeps many security contractors away from IP surveillance system. Now,
using the DVR no longer need to config IP address, just need to plug the
Ethernet cable and power on the system, it will automatically search the IP
camera in network, then automatically distribute IP address.
VIDEO
STORAGE
Powerful video recording and storage is one of factor for
people like to use the DVR, however this function is still constrained by its
analogue front-end; for example, DVR cannot support front-end video storage,
once there is problem on central equipment, the video surveillance system will
not be able to receive video footage; At present, majority of NVRs can support
three video storage methods including central storage, local storage (in IP
cameras) and client storage. If the central cannot recording, the system will
automatically switch to local storage for backup video footage; from the
storage capacity, NVR can be filled with high capacity HDD, with External HDD
port, Ethernet port, USB port for extending unlimited storage space.
SECURITY
Network product has been considered face with a security
risk for a long time. In the absence of reliable intrusion protection, the
network might be exposed to attack and intrusion. In nowadays IP surveillance
system, once utilizing AES encryption for video streaming, user authentication,
authorization and other security methods to ensure the security of IP
surveillance systems. Now almost of NVR products can implement this security
protection technology. In contrast, CCTV cameras transmit the video signal
without any data encryption, which lead to easy to be illegally intercepted and
once this happen, the video signal is very easy to be displayed in monitor.
MANAGEMENT
Centralized management is one of core advantages for NVR
surveillance system, it can achieve centralized management for transmission
line, transmission network, and front-end IP cameras, the system can monitor
the status of each equipment, also browsing the parameter of equipment,
nonetheless, CCTV camera connects to DVR in one way, transmission only contains
video signal, therefore it’s impossible to monitor the front-end cameras.
In
summary, DVR records from analogue video stream from analogue CCTV cameras, and
NVR records digital video stream, which has already been, encoded at the IP
cameras. Therefore, you will notice the DVR with many video/audio inputs, In
contract an NVR only with Ethernet port for connecting into LAN or Internet.
With reason of many limitations for the DVR, more and more security projects
are deploy the NVR for advanced video surveillance system.
