CCTV (closed-circuit television) is a system that allows you to monitor movements and events through the use of cameras. It is one of the most popular types of video surveillance technology in operation today and used by most businesses.
1. What is CCTV
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2. CCTV Technical terms to understand
Image Sensors
Video Encoders
Recorders
Image sensors are used in cameras to convert light into electronic signals. They contain multiple pixels that register the amount of exposed light, transforming it into electrons.
Video encoders make it possible for CCTV systems to migrate to some network systems. This migration allows you to capitalize on modern features and cheaper hardware. Encoders allow a wired connection and digitize video signals, sending them to a wireless IP-based or wired system.
There are two types of recorders; digital video recorders and network video recorders.
- Digital video recorders process footage themselves and are often used with analog cameras.
- Network video recorders encode and process the footage at the camera level, then stream it for storage and remote monitoring. Network video recorders are used with IP cameras.
3. Types of CCTV systems used
Digital CCTV
IP-Network CCTV
Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point-to-point (P2P), point-to-multipoint (P2MP), or mesh wired or wireless links. Even though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that require additional security or ongoing monitoring
IP CCTV systems use a video server to stream the feed over the internet. They use digital or analog HD security cameras to capture the footage. If you use IP cameras, however, you can contain multiple cameras in one. This option would allow you to cover wider angles—something that would take several cameras or camera systems to accomplish. Some of the advantages these systems offer include:
- Remote monitoring
- Better resolution
- They do not need network cabling
- You can use Distributed Artificial Intelligence to analyze images and footage, enabling the automation of the surveillance process
- You can get Power Over Ethernet
- hey are highly mobile
4. Typical applications of CCTV
Person Detection and movement
Person Recognition
Dangerous Objects detection
Intruder detection
Parking Lot surveillance
Unattended Objects detection
5. Considerations for buying and installing CCTV systems
Type of Camera system
- Choose between hard wired or wireless Network systems
- Select the right Resolution to fit the application (Mp or Megapixels, min set at 1080p or preferably 4k)
- Choose a Camera that has the correct viewing angle (some are capable of 360 deg viewing)
- Decide if Black and white or Colour is required to provide the desired output
- Choose whether the camera is fixed or needs to be remotely controlled for movement
- The relative lighting in the environment will also dictate the type of camera and resolution to be used
The type of Storage and Location
- Choose the correct storage device, typically can be DVR (Digital Video Recorder), or NVR (Network Video Recorder)
- Location for storage needs to be secure
- Cloud based storage is the recommended options as data is backed up off-site and controlled in a data centre
Amount of Storage required
- Depending the type of recording to be completed will determine the storage requirements
- Movement based recording will only record based on movement
- Constant recording will record 24/7 with data being overwritten at a given interval. This requires the most storage requirements
- Your data centre and Security provider will advise the best option
6. Understand the nuances of using CCTV
- Depending on the application can be considered invasive to employees
- Workplace surveillance can install a false sense of security making people less vigilant
- Employees can become stressed and feel unproductive as they know they are being watched
7. Useful Links
Security Services
CCTV Surveillance Systems / Operations
Transition
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Some video surveillance providers require contracts, and some don’t. Research this factor before you make a purchase, especially if you are moving business locations in the next year or don’t want to be locked into a contract.
1. CCTV FAQ
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Do Business Security Cameras require Contracts ?
This also depends on the provider and your subscription plan. Some providers include 24/7 professional monitoring with your subscription, while others require you to pay extra and others do not offer it at all.
How often are Security Cameras monitored ?
Security cameras can help protect your business against theft, intrusion, fire, flood, or burglary, significantly increasing peace of mind. They can be expensive, depending on business’s needs, but generally are worth the investment.
What are the pros and cons of using Security CCTV cameras ?
You can pay for long-term or even infinite storage, depending on your provider, or use external storage devices if you want a long-term backup copy of your data. Many surveillance systems store footage for 14 or 30 days.
How long does the recorded data stay on the system ?