If you’ve been scouting the market for home surveillance systems, then you would have certainly come across several DVRs. With so many different options, it’s bound to get confusing. No worries, here in today’s post, you can find all that you need to know about these digital surveillance systems.
First things first, what is DVR?
DVR is the acronym for Digital Video Recorder. With a HDD as the name implies, these systems can record and store surveillance footage digitally. This means you can capture videos of higher quality.
However, unlike IP cameras DVRs don’t connect directly to the internet. They are a part of the closed circuit system, meaning they connect to each other locally and not to other external networks.
Let’s take a closer look at the working of a DVR.
Working of a Digital Closed Circuit Surveillance System
A DVR system comprises of a set of CCTV cameras that are connected to a DVR device. This device is capable of recording digital videos. If you have an analog CCTV system, you can easily transform it into a digital system by replacing the VCR with a DVR.
The DVR is essentially a computer that stores the security video/images on a hard drive. Majority of the security cameras used today capture analog images. The DVR converts these analog signals into digital and stores them on the hard drive after compression.
DVRs can handle inputs from several cameras. You can view all these images and videos at a time or one by one, depending on your preference. There’s no need for any additional switches, multiplexors or quads.
Types of DVRs
DVRs are available in a wide array of sizes from small, pocket-sized ones to large PC sized ones. Additionally, a few DVRs can be connected to an external network, which allows you to view the footage via the internet.
The Three Main Types of DVRs include:
This is a stand-alone device that takes in analog CCTV camera inputs and stores it in a local HDD after compression. The OS and the software are on a chip and it comes with an HDD to store the images.
Embedded DVRs use an exclusive embedded operating system that is not open to external networks. This means they are less vulnerable to viruses, hackers and other malicious attacks, making them highly secure.
This type of DVR CCTV systems can accept video inputs from both CCTV cameras and IP cameras. You can opt for these to smoothly transition from an analog surveillance system to an IP-based surveillance system.
This means you can use both CCTV and IP cameras in your home. You can opt for CCTV cameras in less vulnerable areas and go for high-resolution IP cameras in high-risk areas.
PC based DVRs:
As the name suggests, a PC-based DVR is integrated into a personal computer. It contains a network card, a motherboard, a video board, a DVR capture card and a memory drive.
The key benefit of this type of DVR is that you can upgrade and expand the memory space easily by adding more hard disk drives to the system.
Finally, how to choose the right DVR system? While there’s no doubt that DVR systems are highly efficient, finding the right DVR box is essential to ensure that you meet all your security requirements. The best way is to consult a professional security system installer like Eurovigil to help you find the best one that perfectly matches all your requirements.