We’re going to answer one of our more common questions that we get today and that are what the difference between an NVR and a DVR is. You may be familiar with these terms and know that both of these are used in the CCTV industry to record and capture video signals from your cameras. They are different pieces of equipment however and we’re going to explain a little bit more about each one their benefits strengths and weaknesses.
first let’s take a DVR firstly know that DVR stands for digital video recorder this technology has been commercially available since around 1999 which makes it a little bit older than. It is NVR counterpart all a DVR does is take video from an external source such as this analog camera and encodes and records it to its internal hard drive. Digitally in CCTV DVR are used to capture the incoming video signal from cameras using analog cables connected to the ports on the back of the DVR. The signal transmitted can be analog but more commonly as a digital signal. The DVR has processors capable of encoding and compressing the incoming video signal to make better use of space. This space is located on as many hard drives as installed in the DVR. Most modern DVR are hybrid systems capable of using more than one digital or analog video signal type. Most of our DVR can actually add a certain number of ip cameras as well though how many and for what channels you’re able to add them depend on the model of DVR. so you may be asking yourself can’t NVR do all this as well not exactly there are some key differences.
So let’s talk a little bit now about NVR, NVR stands for network video recorder which leads right into one of the major and more obvious differences between DVR and NVR. NVR only work with IP/network cameras they cannot take the analog or digital video signal input from an analog camera. Some NVR supply power over Ethernet or POE right from an on-board POE switch port cluster. Other NVR connect to cameras on an external POE switch on the same local network additionally unlike DVR. the vast majority if not all the processing done to encode the video data and compress it does not take place on the NVR IP cameras usually do their own data compression and encoding then send this data to the NVR to be recorded to its hard drives. This is an advantage because this frees the NVR processing power up for other activities with less bogging down including remote viewing with less lag playback and exporting with less chop and advanced features like artificial intelligence processing because of that extra processing power headroom.
we discussed NVR are a little bit better at doing some of other features additionally they’re more commonly associated with working with higher resolution cameras like 4k and up DVR and analog cameras. NVR are better for installations that might already have some equipment on site from older install IP cameras and NVRs can be better on newer installations where fewer cables need to be run for a brand new installation.
There’s tons of other reasons why each of these setups can be beneficial in their own way we’ve got two great videos one about the benefits of IP cameras and the other about the benefits of analog cameras. We explain about the primary differences between NVRs and DVRs.