Are you a homeowner or a business person who is considering a video surveillance system in your home or office due to increasing crime rates? If so, there are a lot of choices out there and you may not be sure what type of system to invest in. In this article, we will discuss the main systems that are available on the market today, the digital video recorder (DVR) system, the network video recorder (NVR) system, and the stand-alone wireless Internet Protocol (IP) system.
A DVR is considered as the heart of a closed-circuit television (CCTV) surveillance system. It has several inputs or channels that are used to connect to the individual cameras. Each specific camera can be set up in a specific manner to guarantee that it can record footage in an optimal way for its location and intended use.
An NVR, like the DVR, is also the center of a CCTV system. It is a central component that is linked to all IP cameras throughout a network using the transmission control protocol TCP/IP. In this case, every camera has its own IP address and communicates with the NVR.
Similar Features of DVRs and NVRs
There are several similar features of DVRs and NVRs. Among them are:
· They both have footage review and archiving capabilities.
· Both have remote viewing features.
· They have text overlay features.
· They possess matrix screen view features.
· They have movement detection capabilities.
· They have alarm triggering features.
· They can produce event reports.
· They both have audio recording features.
· They both have pan, tilt, and zoom controls.
Contrasting Features of an NVR and DVR
Here are some differences between NVRs and DVRs:
– In the NVR, the encoding of a video is directly done at the cameras. With DVRs, video encoding is done on the device itself rather than at individual cameras. Encoding is the conversion of digital video files from one format to another.
– Selecting security cameras for NVRs is harder to do than selecting cameras for DVRs because there are more compatible camera models for DVRs. When buying your security cameras, be sure that they are compatible with your NVR or DVR to ensure a smooth installation process.
– The technology used in DVRs enables secure and direct access to the video feeds, while the technology in NVRs allows remote video access.
– A DVR can only receive the recording and cannot edit or change it, while the NVR can receive and edit the footage in different ways depending on the system.
– The footage captured by an NVR can be viewed remotely, while the videos recorded by the DVR can only be viewed at the device on-site.
Basic Components of a DVR/NVR Surveillance System
The basic devices that make up a DVR/NVR surveillance system are:
- DVR/NVR– These are both the part of the system that record and store the footage taken by the cameras in a digital format to a hard disk drive.
- Cameras– The cameras are used to capture images or video from monitored spaces. There are various types of cameras available on the market today. Among them are:
- Fixed cameras– Fixed cameras are those that are generally intended to monitor a specific area. These cameras are considered more dependable than the other types of cameras because they are focused in one direction and have less moving parts.
- Pan/Tilt/Zoom (PTZ) cameras – These cameras have better focus and coverage because of their ability to pan, tilt, and zoom. These abilities allow them to focus on a moving person or object in their covered area for detailed monitoring.
- 360-degree or virtual PTZ cameras – These types of cameras are usually comprised of several high-resolution fixed cameras that are installed together in a single housing. Because each camera is faced in a different direction, these types of cameras can cover a wide range.
- Monitors – These devices are used to view the footage captured by the cameras.
NVR/DVR Systems vs. Stand Alone Wireless IP Camera Systems
A stand-alone IP camera can capture, record, and transmit the images or video from a monitored space. Because it has a built-in central processing unit (CPU) and web-based solutions, it can operate independently and provides high-resolution video streaming. The camera also supports such advanced functions as alarm management, motion detection, real-time streaming protocol (RSTP), and real-time transport protocol (RTP). It can also be accessed and controlled remotely from any computer or smartphone such as iPhone and Android phones.
Some Benefits of IP security cameras
Here are some advantages of using IP cameras:
· Easy transmission of videos or images as long as there is an Internet connection.
· It has adjustable frame rates and resolutions that can meet your specific requirements.
· It has unrestricted high definition (HD) monitoring capabilities.
· It has advanced file transfer protocol (FTP) alerts, power over Ethernet (PoE), two-way audio, and Wi-Fi capabilities.
· It has a broad range of smartphone applications (apps).
· It provides data transmission with encryption and authentication techniques such as wired equivalent privacy (WEP), as well as Wi-Fi Protected Access (WPA) versions 1 & 2.
Some Disadvantages of an IP surveillance camera
Here are some disadvantages of a wireless IP camera:
* It has high requirements for Internet network traffic. As an example, a basic IP camera with 640×480 pixel resolution and speed of 10 frames per second in MJPEG mode needs a data transfer speed of around 3 megabits per second (Mbps).
* It has a higher initial cost.
* It offers some technical issues as it requires IP camera network settings and IP addresses during installation.
How DVR/NVR Systems Compare?
In contrast to the easy setup and flexibility of a standalone IP camera, DVR/NVR systems will have greater installation requirements and in some cases, higher costs depending on the system selected and the number of cameras included.
They also require additional space on-site to store and protect components. A DVR may be a wired installation which has protections against online hackers but requires the additional cost of wiring and professional installation that may be cost-prohibitive.
For a quick entry level security system, standalone IP cameras may be a simple and fast solution. However for larger homes and businesses that may have more complex surveillance needs, a more complete DVR/NVR system that can be expanded for future needs can be a smart choice. The best way to determine which system to use is to consult a security system professional, either locally or online to help you with your unique surveillance needs. The most important step is to make the smart decision and get your property protected today.