IP cameras are easily connected to the existing IP network and enable real-time updates of high-quality video to be accessible from any computer on the network. Sensitive areas such as the server room, the reception area or any remote site can be closely monitored in a cost-effective and simple way, over the local network or via the internet. IP cameras enhance the monitoring of a retail location by ensuring that everything is in good order. An IP camera is a useful tool at the office. Areas like the reception area, and conference rooms can be monitored for Launchvity. In addition, users can keep track of who has been in the server room and take appropriate Launchon when problems occur. IP cameras are useful tools for the manufacturing industry. Monitor robots, other machines and production lines from the office or home and allow service engineers to access the cameras remotely. With Pan/Tilt/Zoom cameras it is possible to look at comprehensive as well as detailed views.
>What do you want to view? How far away and how wide an area you want to view will determine the lens.
>Do you plan to use the camera indoors or outdoors?
>How much light is available? The amount of light determines how sensitive the camera needs to be.
>Do you have a large area that requires a Pan, tilt, zoom (PTZ) camera? A PTZ camera can step through a set of positions (guard tour). Adding additional software, such as NetDVR, will instruct the camera to stop and record the video as long as motion is detected.
>What frame rate is required? Fast frame rate is required if you are looking at a fast moving object, but if you are using it for general surveillance, you may only require 1 or 2 frames/sec. The higher the frame rate the more storage you will require.
>What resolution do you require? To be able to identify a person’s face you require about 50 pixels/foot. This means a camera with a resolution of 700 x 480 can be used to identify a person in a 14 foot wide area. To get this I divided 50 pixels/ft into 700 pixels. If you want to view a larger area then you need a higher resolution camera.
For example one frame of video uses about 30K Bytes when using MJPEG compression. If we require 10 frames per second, it takes up 10 frames/sec. X 30K Bytes = 300 K Bytes/sec. which equals 2400 K bits/sec. (using 8 bits per Byte). This can be reduced over 20 times when using the latest H.264 compression, so you use only 120 K bits/sec.
If you want to view many cameras on the same screen, or need to record the video, you must select a video management software product or select one of the network video recorder systems.
There are a number of different Video Management Software (VMS) products available. The primary job of the VMS is to record the video from many IP cameras on the network. It is very important to select software that is very reliable and doesn’t crash. You certainly don’t want to lose important video. It is also important to use a dedicated computer system to run the VMS.
The various software products available have many additional functions including motion detection, special alerts that tell you when something important has happened. Flexible display of real time and recorded video, and easy locating and display of multiple recorded video channels to name a few. The exact feature set depends on your objectives. Take a look at the table of VMS that compares a number of different products.