Once people decide that they’d like to install security cameras at their home or office, the next common step is browsing through different camera options on the internet. Most of them also start thinking about the best places to install the cameras. In the process, they often overlook one of the most important aspects of security cameras- their recording technology.
NVR (Network Video Recorder) and DVR (Digital Video Recorder) are the two types of systems used for recording surveillance videos. To help you decide between the two, we have listed some of the most significant differences between them-
- What are NVR and DVR Systems?
NVR systems record the video streaming that is transmitted through the network cable. The LAN network or the internet is used for connecting NVR to IP cameras. NVRs are self-contained systems which combine computer, surveillance software, PoE (Power over Ethernet) switch, and storage.DVR systems record the surveillance footage from analogue cameras in digital format. These systems receive analogue video signals from the cameras which are compressed and then stored into hard drives. The DVR systems have storage space just like computers for storing the compressed videos of several days.
- The technology of NVR and DVR
As mentioned above, NVR systems come with pre-installed software for surveillance video management. With the help of this software, the system is able to record videos from the network cameras or video encoders. Such systems are mostly used with IP security systems which can be remotely managed through the internet.DVR systems are just recording devices. Their function is to receive digital and analogue video input signals before compressing the signals and storing them in the hard drives. If the video input signal is analogue, the DVR system first converts it into digital before compressing it. There are now self-contained DVR systems that come with PC-based proprietary operating system.
- Cabling and Installation of NVR and DVR
With NVR systems, there is a single cable connected to the security cameras. The single cable does the job of transmitting video signals and powering the camera. This makes installation of the NVR camera considerably easier.DVR systems are connected to the security cameras with the help of fibre optic or coaxial cables. There are generally separate cables for video signals, power, and functions like PTZ (Pan, Tilt, Zoom). This makes the installation for DVR systems and analogue cameras a little difficult as compared to NVR. But as cables are responsible for signal transmission, DVR systems are known for their reliability.
- Surveillance Video Access with NVR and DVR
As the NVR system works on an internet connection, it allows remote viewing of the recorded footage. There are now IP cameras and NVRs that enable you to remotely view the security footage on your mobile phones, PCs, laptops, and tablets.With DVR systems, you need to be physically present at the system to view the footage. But as most DVR systems now come with a USB port, you can transfer the recordings to an external storage device and carry the same with you.
- Cost of NVR and DVR
As NVR IP camera is technically more advanced, it is more expensive as compared to DVR. But with IP systems, one requires to install fewer cameras to cover the same area as compared to analogue cameras. Even their cabling needs are minimal.DVR systems and analogue cameras are generally cheaper than NVR IP systems. While analogue technology has been around for a long time, it is still very commonly used as the backbone of modern surveillance systems.
Making a Decision
Both NVR and DVR systems have their own benefits, and the decision ultimately relies on your requirements. If you already have coaxial cable and analogue cameras installed, you can consider DVR.
But if this is the first time that you are installing security cameras and want the installation to be as easy as possible, go with NVR system and IP security cameras. If you are unable to decide, look for a reputed brand like Eurovigil that offers risk assessment and consultation services.