DVR (Digital Video Recorder)
Digital video recorders (DVRs) can be used with analog or IP CCTV security cameras. DVRs record images and video from CCTV security cameras in a digital format file, using software and a computer hard disk, converting analog video into digital. Video can then be copied to portable hard disk, USB drive, SD memory card or other local or network storage device enabling you to view CCTV video in real-time or playback later.
DVR allow for remote access to security footage using a PC, Smart Phone, or tablet can also be achieved by connecting the DVR to a LAN network that has an internet service.
NVR (Network Video Recorder)
Network video recorders (NVRs) record video images in digital format to a hard disk via an ethernet network using Cat5 or Cat6 cabling. IP CCTV security cameras and NVRs are slightly more expensive than analog CCTV security cameras and DVRs, but IP cameras and NVRs provide much higher image resolution and video clarity compated to analog cameras and DVR systems.
The main difference between a network video recorder (NVR) and a DVR is that the NVR is not limited to being located in the same area as your camera cabling. An NVR can be located anywhere as long as it is connected to the same LAN network as the IP cameras.
Unlike DVRs, NVR video is encoded and processed on the camera then streamed over the internet to the NVR for storage or remote viewing.
Most modern DVRs and all NVRs allow for remote access of CCTV video footage via the internet using either PC, laptop or smart phone. Remote monitoring using DVRs is more complex and with NVRs as servers, IP addresses and bandwidth need to be taken into consideration.
Contact us for assistance and advice on which CCTV system best suits your requirements.