Need for video transmission over wide geographical range – Putting video on the IT network makes it possible to use switches, hubs, and routers to expand the network to a broader range.
Factors to consider when implementing IP System:
Network Bandwidth
If you are using a local network, cameras can be patched through a special dedicated router for the camera, thus eliminating most concerns about bandwidth. However, if images are sent by PSTN, bandwidth considerations do come into play. To get a performance of 30 frames per second, you need a minimum bandwidth of 120 kB/s.
Hard disk space
Hard disk storage requirements are dependent on the frame rate of the video you want to store. If you want to store all video at 30 frames per second (30 fps) as opposed to 1 fps, then that requires 30 times the amount of storage. Each application has different recording and storage needs in terms video fps, and hard disk storage requirements will differ.
Software application
A wide variety of software applications can be used. What software to use is governed by the end-user application and their specific needs.
System Design & Future expansion
But we don’t need to stop with the first-level upgrade described above. The digital revolution’s video server and camera technology enables us to expand the system and its advantages. With a digital system, you can connect as many cameras as you want. You can attach each new camera directly to the network.
This provides a new set of added benefits:
- Viewing access can be restricted to only authorized persons, or live video can be posted on a company’s website for the entire world to see.
- If the building is equipped with an IP network, then the necessary infrastructure already exists to add network cameras without high installation costs.
- Network cameras perform many of the same functions as a standard analog CCTV camera, but with greater functionality and at a substantial cost saving.
- Network cameras plug directly to the existing network, yielding substantial savings because the coaxial cabling required for analog cameras isn’t needed.
- When computers are already in place, no additional equipment is needed to view the video output from a network camera
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