DVR in CCTV Camera

What is DVR in CCTV Camera

There are two main types of recording systems in the market. The first being the DVR which is cheaper and easier to setup. The second being the NVR which is fairly more expensive and requires some technical knowledge (but we will be talking about it in the following steps). DVR (Digital Video Recorder) are mostly wired. You need special equipment to make it wireless.

A digital video recorder (DVR) is an electronic device that records video in a digital format to a disk drive, USB flash drive, SD memory card, SSD or other local or networked mass storage device.

[DVR] uses analogue cameras which need a two core cable for signal. Usually coax cables are used and u need an additional cable for power.

Working of DVR

Digital Video Recorders converts the analog signals from a CCTV camera to digital format, store the information into a hard drive and also send live video stream to other devices on the network.

Types of DVR

There are many types of DVR that is available which comes in wide variety of sizes as well. There are three types of DVR available in market they are;

Embedded DVRs
Hybrid DVRs
VPC-based DVRs

Embedded DVR

Embedded DVR is a standalone device which takes the input of the analog camera. It will start to compress the image and afterwards, store into a local Hard disk. Embedded contains all components needed like the operating system, CPU, etc in one cabinet so no external network is allowed. The benefit of this is lesser chance of virus or hacks to happen. However, the problem is that it isn’t fault tolerant in instances when one component fail, you likely have to get a replacement for it since its tied to one chip.

Hybrid DVRs

Hybrid DVRs make use of both inputs from CCTV cameras and IP cameras as well. This allows a mixture of regular analog cameras in low-activity areas and High Definition (HD) IP cameras in high-risk areas for you to use. It is useful for situations where you need to expand the amount of cameras required instead of getting another system. The only few downside is that the IP cameras need to use Ethernet cables in order to work.

PC-Based DVR

PC-based DVR is essentially recording equipment being integrated into your PC. The DVR card meant for recording is in the computer tower/rack along with other standard components in a PC like motherboard, video card, etc. It is often flexible as it is able to upgrade,expand memory storage just like a regular PC. The con of this is that it will be more prone to virus or security breaches as you need to disable your antivirus software and disable windows updates. Even if you aren’t using windows, the drivers for Unix OS are scarce for recording.