Now let’s take a look at IP video technology, which covers cameras, storage solutions and software solutions supporting them.
Strengths:
۱٫ This technology can achieve megapixel resolution of images which results in excellent clarity and crystal clear picture. Zooming in x2 or even x16 of a playback or live image will still provide useful and clear image
۲٫ Wireless transmission of the IP camera signal is much more robust, resistant to interference and very secure
۳٫ It is easy to remove, replace or add new cameras into the system
۴٫ It is also easy to move or replace the NVR and the data storage devices
۵٫ IP Technology allows a variety of data storage options including redundant storage, remote storage, etc.
۶٫ Easy to maintain and upgrade the firmware and software of the IP cameras and other network devices
۷٫ The same CAT5/6 network cable is shared for the video transmission, control data and power supply to the cameras. No other cables are required for the installation
۸٫ A large range of video analytics and many other video applications and integrations are readily available on the market. These include licence plate recognition apps, traffic counter apps, face recognition apps, as well as integration with many compatible access control systems
۹٫ Many network recording software apps are powered with intelligent search based on operator’s requirements as well as digital zoom with good quality
۱۰٫ Some IP CCTV manufacturers offer their own SDK (software development kits) so the third party manufacturers and developers can design new video security applications with their products.
Weaknesses
۱٫ IP camera performance under low light conditions is significantly inferior to its analogue counterparts
۲٫ IP CCTV systems are more fragile than analogue ones, because they rely heavily on the network infrastructure. If the network goes down there will be no live video monitoring neither recording by the NVRs
۳٫ Because of the packetised nature of the IP network data transmission there will be always a delay in the video signal. This delay can be in magnitudes of 10 or 20 seconds and is especially noticeable while viewing all cameras simultaneously in real time at higher resolutions
۴٫ Installation of a large IP CCTV system requires lots of initial planning and extensive knowledge in computer networking as well as IP video. If not designed and specified properly, the system will suffer from latency, delays and missing frames. If that is the case, even simple operations like a simultaneous play back of 2 or more cameras will be very slow and frustrating for the security operator. Bear in mind that missing frames from a video stream mean missing frames from streams recorded on the NVR, so there is a probability that some important events may not be recorded at all. Our experience is that Murphy’s Law often proves applicable in cases like this because when the network was configured at the right level, we had quite a few instances of missed recordings from important events
۵٫ There are a few compatibility limitations among the cameras, NVRs and CMS software that have to be sorted out when planning and deciding what IP CCTV equipment to use
۶٫ There is a limitation of max 100m cable run between the network nodes
۷٫ Larger systems require fast and robust network infrastructure which usually has to be built from scratch
۸٫ Megapixel IP cameras require much more storage space than analogue CCTV cameras
۹٫ Every IP camera has its own allocated data storage which is a different recording approach than the global, shared, storage used by the analogue systems. In order to optimise the IP CCTV system’s storage capacity it will require every individual IP camera to be monitored for its activities over certain time
۱۰٫ Cost to build and setup the IP system is at least double than any other CCTV system and cost to maintain is triple or more
۱۱٫ Many central management software – CMS vendors, on top of charging for their application software, ask for an additional licence fee for every IP camera used in the system.
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