At the core, both NVR and DVRs are responsible for video recording. DVR stands for Digital Video Recorder, whereas NVR stands for Network Video Recorder. The difference between NVR and DVR is how they process video data. DVR systems process the video data at the recorder, whereas NVR 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. As DVRs and NVRs handle the video data differently, they require different types of cameras. Most NVRs are used with IP cameras whereas DVRs are used with analog cameras. It’s important to note that a DVR based system is a wired security system, whereas NVR systems can be a wired or wireless system.
Both systems record video data and are reliable. Although in the past the video quality of DVR systems lagged behind comparable NVR systems, today this gap is significantly lessened. The difference between DVR and NVR systems come down to the cost, how the data is transmitted, and type of cameras. NVR systems tend to have better picture quality, as well as easier installation, increased flexibility, and native support for audio on every camera that has a microphone. However, NVR systems also tend to be quite a bit more expensive than comparable DVR systems, which is an important consideration for the budget conscious consumer. For people looking for a relatively straightforward security system, a DVR system will most likely be sufficient, especially if your property is already wired for a coaxial cable from an existing security system. If you need a top of the line, very flexible solution, an NVR based system will be best. At the end of the day, the deciding factor will be based on the specific security needs of your property.
Following are the issues you need to address before buying a CCTV system:
Should my CCTV cameras be discreet or a visual deterrent?
Box cameras present an obvious sign for anyone who passes by that they are being recorded on CCTV and this can be a great deterrent of theft and crime. Whereas dome cameras are smaller and more discreet. These compact cameras are ideal for monitoring a larger area such as your front or back garden and can follow movement with ease.
How do I know what to use indoors and outdoors?
When thinking where you would like to place your cameras, you might want to think about how they will be mounted and housed, in order to ensure that they’re in the best location and well protected. For example, if your camera is to be placed outside, you will want it to be robust and weather proofed. If it’s to be placed indoors you will want to ensure it will not be affected by grease or steam from a kitchen.
What are the light conditions like?
Test different camera models to see what works best with the lightning in your area, because no matter whether they’re inside or outside, the lighting will differ throughout the day. You will want to check any reflections and back lighting during the day and night.
Is image clarity important?
Depending on how expansive the area is that you want to cover, the resolution of the CCTV camera you choose will need to reflect the landscape in order to provide a clear, useful image. However, if situated in a small room, the camera need not be of a high resolution.
Is audio required?
Audio isn’t required, however, if you do wish to opt for audio there are systems where you can speak to a person who has broken into the property. Audio can be used to deter criminals by automatically playing something when they get a certain point inside, an ideal way to make them think that there are people inside the building.
Instead of transmitting video over a video cable to a monitor or DVR, an internet camera transmits digital video over a data connection: ethernet, USB, WiFi, etc. Everything required to transfer images over the network is built into the unit. It is connected directly to the network, just like any other network device, like a printer or scanner. Depending on what type of camera it is, it may save video to an attached memory source, connect to another device on the network for storage, or stream captured video to the internet.
An internet camera captures images the same way any digital camera does. What makes it different is its ability to compress the files and transmit them over a network. If a building is equipped with a network, the necessary infrastructure is already in place to install network cameras. If adding one or a few cameras, a user may use a decentralized network camera, one that has its own control interface and storage medium built in. When installing multiple network cameras it can be wise to use a centralized network camera, which requires a network video recorder (NVR).
An NVR is a program that can store video from network cameras and allow for viewing of multiple cameras at once. It is similar to a DVR, but while a traditional DVR is responsible for encoding and processing video from component cameras, an NVR depends on the cameras to encode their video, simply storing it and allowing for centralized remote viewing. NVR software can be installed on a dedicated device with its own operating system or on an existing computer. There are hybrid systems available that can accept both IP and analog inputs. These will often allow analog cameras to be viewed remotely along with any network cameras.
Let’s take a look at the different area’s you need to explore in order to make an educated decision about which indoor security camera system you need.
- Video Quality – Most of today’s indoor security cameras offer 1080p video quality which has a sharp picture that’s easy to stream over your Wi-Fi network. There are also some 720p indoor cameras still on the market as well. The picture won’t be as clear, but the pricing will generally be lower.
- Night Vision – Night vision is an important feature when you’re talking about any security camera. This is what will enable you to see what that noise is that’s coming from another part of your home. The main thing you need to look at here is the range of vision. Some night vision cameras have a shorter range than others.
- Wide-Angle Lens – The wider the camera lens is, the more you will be able to monitor and view all areas from the front, left, and right of the camera lens. Most cameras have an average of about a 130-degree angle, but some have more and some have less. There are also 360-degree wide-angle lenses as well; however, sometimes on the super-wide-angled cameras, distortion can be a problem.
- Live Streaming – This option will remotely let you see what’s going on via a video camera in your home in real-time from anywhere and at any time.
- Two-Way Talk – A two-way talk feature uses a microphone and speaker located on your camera or control panel to communicate with guests, intruders, and even your kids and pets remotely.
- Alerts – Most indoor cameras have motion and/or sound sensors that will send you an alert if motion and/or sound is detected. And many models can even distinguish or recognize family members and pets in which case an alert will not be sent.
- Video Storage – There are a wide variety of security cameras that offer some type of video storage, whether that be a cloud storage option or local storage on a microSD card. Some companies charge for this service and others do not. So keep that in mind.
- Adjustability – Some indoor security cameras offer a fixed camera view and others offer a camera that will pan, tilt, and zoom so you can scan and view a larger area. So while the fixed camera will cost less, you might have to buy more of them to cover the area you want to monitor. However, while a pan and tilt camera seems like it costs more, you might only need one camera to cover that same area, which will ultimately end up costing you less.
- App – Most of today’s security cameras come with an app you can use to remotely access, monitor, and control your security and home automation equipment from your mobile device and/or laptop/computer.
- Price – The cost of your new indoor security camera system will vary greatly depending on which equipment options, features, or packages you choose. And that will all depend on your particular security needs, as well as the size of your home and how many areas of coverage you need. Therefore, there’s no real way to give you an average or even a price range for what you might need. You can start by deciding on the features, options, equipment package, and monitoring (if you want that), then do a price comparison for the companies that offer the equipment or product packages you want.
Firstly, we need to differentiate between analogue and IP cameras. Some benefits of the first type are the cost, wider choice of vendors and simplicity. The cost can often be significantly lower for the analog camera, but the gap between the prices is definitely getting smaller. If you need a bigger number of cameras and have a limited budget, analog is a way to go.
Analog cameras have been used for many years now meaning that it might be easier for you to find a vendor or an installer.
The simplicity of installation is another advantage of analog cameras. They send the recordings to a Digital Video Recorder (DVR) which is also fairly simple to set up.
On the other hand, image quality and frame rate of IP cameras are undoubtedly better. The areas with a lot of traffic and motion are better covered with IP cameras since they create much sharper images and allow for you to zoom in. Also, IP cameras cover a wider area, require less equipment and provide encrypted and secured transmission.
CCTV Camera Shop, located in the UK, offers a lot of different options. For a very reasonable price, you can get outdoor video monitoring CCTV kit which includes 4 channel HD DVR paired with 4 weather-proof 720p surveillance bullet cameras with night vision.
If you’re ready to spend a bit more money and need something that will give you a better video quality and clarity, high resolution (1080p) weather-proof cameras with night vision to up to 100ft and a motion detector could be a way to go. Options truly are plentiful.
Most video security systems consist of several cameras. They can be concealed in many places, including smoke detectors, telephones, and even in the frames of artwork hanging on the wall. These cameras are generally used to monitor activity inside the home. Some outdoor systems leave one or two cameras exposed as a deterrent, while the other cameras capture happenings in other areas. They can be connected to a VCR or DVR so you can review footage at your leisure.
It is also possible to have remote monitoring, allowing someone with the proper equipment installed on their personal computer to look in on a video surveillance system at another location. This is a feature offered to parents at a growing number of daycare centers, and is becoming increasingly popular for parents who want to check on their older kids who are home alone after school, etc.
Some surveillance cameras are designed to record sound as well as video, while others record only images. While signs warning consumers that they are being filmed and recorded must be posted on the doors in all public places that use audio and video systems, there are no such requirements in private homes.
You need to consider the following things when buying a security camera:
Advantages of using an infrared (IR) security camera:
- Infrared Cameras produce high resolution color video during the day. In low lux (light) or no light conditions they are the preferred camera type.
- They are able to “illuminate the area” by automatically switching from color to black and white. The infrared illuminators turn on and allow you to see much cleared that the human eye in both low light and no light.
- Whether being used indoor or outdoor, they provide a huge advantage in low light or no light situations.
- They can be weatherproofed and can withstand hot and cold temperatures without any additional camera housing needed.
- Indoor infrared cameras offer a clear video image in the light and in the dark.
Advantages of a dome camera:
- Expect a clear color high resolution picture with the dome camera.
- Most pan tilt zoom cameras are in a dome type housing as well.
- Professional “box type” cameras are used both indoor and outdoor with a camera housing.
Advantages of a pro box camera:
- Lenses can be changed on the pro box camera based on the viewing angle and zoom that is required.
- Some Pro Box Cameras are called day / night cameras as they can switch from color during the day to black and white in the evening or in low lux (light conditions).
- The lower the lux, the better the camera can see in complete darkness.
- Infrared cameras are considered night vision cameras and have a 0 Lux rating. You might prefer a box camera if you do not need or want infrared and are more concerned with quality daytime video.
Benefits of a pan tilt zoom camera:
- You can capture a license plate or zoom in on a face from far away.
- You can also program them to do preset tours where you can have them monitor certain areas while you are away.
- Airports, casinos, large department stores such as Target or Walmart are examples of places that use PTZ (Pan Tilt Zoom Cameras).
- Pan tilt zoom cameras are expensive, starting at $500 and up. The question is, “do you need a pan tilt zoom camera”, or can you use fixed cameras to get the desired solution?
- Pan tilt zoom controllable cameras require one additional cable for operation. A CAT5 cable is needed in addition to the power/video RG-59 Siamese coax cable in order to control it live and over the internet. Simply run a CAT5 cable next to the RG-59 to control your pan tilt zoom camera.
Benefits of hidden cameras:
- The main disadvantage is that hidden cameras do not have infrared capabilities which limit their performance in low light.
- In addition, many hidden cameras are not weatherproof, so they take are not as useful as infrared bullet and dome cameras when being used outdoors.
- Pharmacies, hallways of hotels, assisted living facilities, and homes are examples of some of the applications in which hidden cameras are used.
Some interesting facts about CCTV cameras are down below:
- CCTV cameras have been around for far longer than we think. In fact, the first cameras were developed in 1942 but only became mainstream in the security industry in the 1960s.
- The first camera was not actually used for security purposes. Instead, it was used to carefully watch the launching of a rocket.
- The first person to develop a CCTV camera was a German man by the name of Walter Bruch.
- It’s not only those wanting to add extra security to their homes or businesses that use closed circuit tv cameras. With the development of smaller CCTV systems, criminals are also using them for surveillance. Criminals have used closed circuit TV cameras at ATMs to gather important banking information from clients withdrawing money.
- 20% of the world’s installed closed circuit TV cameras can be found in the UK. In fact, statistics say that the UK has 4 million cameras, which equates to 1 camera for every 11 people. It sounds like something reminiscent of George Orwell’s 1984, which was, in fact, also set in the UK.
- It is said that up to 67% of robberies can be deterred by having a noticeable closed circuit TV camera system set up.
- Overall, there are about 25 million CCTV cameras set up across the globe.
- Again, in the UK, about 3% of crimes have been successfully solved using closed circuit TV camera footage.
- It has been estimated that the average UK and US citizen is spotted on a closed circuit tv camera at least 300 times a day.
- Closed circuit TV is not just used to protect people and assets from criminals, it is also used to protect people from entering and being harmed in dangerous, out of bounds areas, such as nuclear facilities or weapon testing grounds.
- Most modern cameras can be accessed via the internet. This allows you to keep an eye on your property regardless of where you are.
- Analogue cameras are becoming exceptionally popular because they produce higher quality images.
For a person who never had security cameras might come across some myths about them. This is very common and happen to anyone with a little to no idea about a CCTV system. Following are some common myths about the CCTV camera systems:
- A CCTV camera system can be installed by anyone.
- CCTV camera systems are only for the rich.
- Criminals might get encouraged by the CCTV cameras.
- CCTV cameras might be trampled by smart intruders (only seen in the movies).
- I live in a safe neighborhood.
- CCTV systems are very hard to use.
- These cameras are nothing but a waste of time.
Safety today is a concept that eludes us. With the ever-increasing crime rate anything can happen when we are away from the house. Only solution that comes to mind is a CCTV camera security system. It can do a lot of good to our families.
Not only can we monitor the activities in and around the house but also it can give us a sense of peace that comes with it. The best quality of security cameras is it can be installed anywhere where crime might take place. CCTV cameras come in an array of different sizes and functionalities. What kind of camera you need will depend on what purpose you bought it to serve.
As mentioned before, CCTV cameras can serve different purposes. However, the main purpose of it lies in surveillance. We can be away from home and watch what’s going on from our mobile devices. We can see when the kids get home from school or how the nanny is managing our infants. Other than that, most obviously a CCTV security system keeps the unwanted guests at bay.