DVRs & NVRs: All You Need to Know

It is crucial that you understand the difference between DVR and NVR security camera systems before making a decision on which one best suits you and your needs.

This article will tell you everything you need to know so that you are in the best position possible when it comes to purchasing a CCTV system.

The fundamentals of DVR and NVR systems

DVR stands for Digital Video Recorder, whereas NVR stands for Network Video Recorder. Both CCTV systems have one purpose and that is to record video, however, the way in which they process the video data is different.

DVR CCTV systems are wired only, and slightly more straightforward in the sense that they process the video data at the recorder; whereas NVR (wired or wireless) systems encode and process the video data at the camera, then stream it to the NVR recorder which is used for storage and remote viewing.

One of the most important things you must know before purchasing either a DVR or NVR CCTV system is that they each require different cameras. NVRs require IP cameras while DVRs require analog cameras.

DVR: pros and cons

Analogue camera

There are pros and cons to both DVR and NVR CCTV systems. One of the biggest pros to DVRs is the price. They are considerably cheaper than NVRs which is largely due to the analog security camera that must be used with them. This basically means that there is less variety in the types of cameras you are able to use. Another advantage of a DVR security system is its simplicity. For example, the analog cameras stream an analog signal to the recorder, which then processes the images.

System usability 

This section gives NVRs another point on the board. While NVR systems can be either wired or wireless, DVR CCTV systems are limited to being only wired. In addition to this, DVR CCTV systems have fewer mounting options due to the routing cable requiring a power source for every camera.

Audio and image quality 

Essentially, DVRs fall short to the NVRs when it comes to image quality and audio options. The analogue signal sent from the camera via the cable to the recorder results in a lower quality image than that of the NVR. The analogue camera also often does not transmit audio.

NVR: pros and cons

IP camera

The IP cameras, which NVR CCTV systems use, process the video data at the camera opposed to on the recorder as DVR analogue cameras do. This means that they are capable of capturing images on their own and they are able to record and send audio as well as video. They are much more advanced than the analogue cameras used by DVR CCTV systems – hence the bigger price tag.

System usability

Arguably, the most notable advantage of an NVR CCTV system is its wireless network feature. It does not have to be plugged into the recorder meaning, so long as each camera is connected to the same network, they can all be accessed as a complete system.

Audio and image quality

The video quality of the NVR IP camera is far better than that of the DVR analogue camera. It is also able to transmit audio – another reason why it is more expensive than the DVR system.

The conclusion: DVR or NVR systems?

It ultimately boils down to how much you are looking to spend on your CCTV surveillance. Both systems are effective and will boost the security of your company’s site tremendously. 

NVR systems are more expensive but have better video quality, are easier to install and include audio. DVR systems are the perfect solution for customers who have a smaller budget but still want to bolster the security measures of their building.

If you would like more information on DVR and/or NVR CCTV systems, or if you would like to inquire about a quote, please feel free to get in contact with a member of our sales team today.