Differences and similarities between NVR and DVR systems

Both technologies use a video recorder: NVR (network Video recorder), DVR (digital video recorder). To find the differences, we’ll need to check the capabilities, and characteristics on both technologies.

NVR Systems

a) NVR systems power the cameras from the NVR (PoE embedded in the NVR), or they can power the cameras through PoE Network switch.

b) NVR systems use network wire, Cat6 or Cat5e to transport signal and power.

Cat6 for security camera

c) The wiring can transmit signal 300 feet without Poe Network Switch.

d) The signal can be transmitted for more than 300 feet, or big distances using Poe Network switch.

e) The resolution delivered by this systems can be from 2 megapixel (1080p) to 8 megapixel (4K).

f) Medium range on infrared capabilities (less than 100 feet).

g) Wireless capabilities. (Wi-Fi Network camera).

h) Frame rate from 12 fps to 30 fps (frames per second).

i) Audio capabilities for each camera.

j) Big distance transmission signal, more than 1 mile using Beams.

DVR Systems

a) DVR systems power the cameras with a 12 volts DC, or 24 Volts AC power supply installed on the surroundings of the  the DVR.

b) DVR systems use Siamese wire, Coaxial wire for signal and a pair of wires attached to the coaxial to power the cameras.

Siamese camera wire

c) The wiring can transmit signal 1000 feet or more without repeaters.

d) The resolution can be from 2 megapixel (1080p) to 8 megapixel (4K).

f) Long range on infrared capabilities (More than 120 feet).

g) Frame rates from 12 fps to 30 fps (frames per second).

h) Audio capabilities installing a microphone.



Customers used to think that: IP cameras can provide higher video quality than analogue cameras. Basically the new analog technologies can produce the same video resolution as IP Cameras. Furthermore  both technologies offer zoom-in capabilities, and same frame rate. The selection of the technology has to be based on the Installation analysis, requirements and budget. Certainly NVR technology is often more expensive than analog technology.