Any organisation today has the security of the premises and the people as one of their important objectives. Many type of security devices aid in achieving this objective. One of the primary and essential security devices is the surveillance camera.
Surveillance cameras are of two types
- Analogue Cameras
- Network or IP cameras
Analogue cameras are the simplest form of cameras which is easy to set up and maintain. In this surveillance setup, cameras send the recorded video or captured images in the traditional base band format via a coax cable or an UTP cabling to a Digital Video Recorder (DVR). Here, video gets digitized and is stored on hard drives
The customer can choose the locations where there is necessity for cameras for eg. The gates, the production line, the cash counter etc. and the system can be setup accordingly.
Pros and Cons
Suitable for smaller premises
Distance will usually degrade image quality
Analogue image capture method has quality limitations
Not easy to expand as DVR has physical Analog to digital converters
IP/ Network cameras
This is the more advanced version of cameras in the market today. These cameras use the same technology as the internet. In this surveillance system arrangement; IP cameras transmit their videos as a digital stream over an IP network. Like in the case of analog system, where the video is recorded on hard drives of a DVR, a video from the IP camera is streamed straight from the camera to the network video recorder (NVR). Video footage is stored on these NVRs and is protected by RAID technology, in order to make the solution redundant and fault tolerant. These cameras can even be streamed over the internet if the connection is fast enough, as the technology used is similar. This however does not mean that they need internet to function, they can function independently over a local area network.
Pros and Cons
They can have much higher resolutions
Have larger storage capacity
Easy to increase number of cameras both in terms of wiring and storage
Can use existing Lan network
Longer distances possible between camera and recorder (even across continents if speed permits)
More inbuilt image processing for images with more visual details
Comparison between Analogue and Digital Cameras
|Description||Analogue cameras||IP/Network cameras|
|Simplicity||Simpler to install and configure||Installation is simple, but configuration is more complicated than Analogue|
|Image quality||The image quality of the best analogue camera is not as good as the lowest configuration IP camera||Image quality is excellent and customers can choose from 1.3 MP to 29 MP and higher|
|cabling||Analogue needs two systems of cabling, one for transmitting the video and the other for power||Here there is only one system of cabling wherein both functions takes place together. POE|
|Internet||Does not need internet||Does not need internet if locally hosted NVR, however if NVR is remotely hosted needs large bandwidth internet connection.|
|Area covered||The total available resolution is limited and therefore only limited area can be covered with acceptable image quality.||Due to availability of higher resolution cameras it is possible to use a single high resolution camera to cover a larger area. The image can be later digitally zoomed to look at area of interest.|
|Transmission of data||Analogue cameras are mere sensory devices that can produce image, they only transmit the capture image to the DVR.||IP cameras have inbuilt processing systems that can receive data and respond accordingly. They can even email a suspect’s picture on a specified event trigger.|
|Remote viewing||Analogue cameras by themselves cannot be used for remote viewing. However most modern DVR’s have remote viewing capabilities.||Possible to view the videos from anywhere where there is internet access even without the presence of an NVR.|
In conclusion, the need for cameras is for capturing images and videos. Hence the biggest parameter to judge a camera is by its image quality. In that case, an IP camera wins hands down.
Nambiar Associates can provide both analogue and IP cameras to the customer according to their needs. Our technicians have the expertise to consult, install and configure both types of camera systems. We use good quality products imported to Burundi which we have tested ourselves and ensured the quality, so that the customers can have the assurance that they are buying only good quality products from us.