Close Circuit Television (CCTV) security offers a wide range of options for homes and businesses. CCTV is now seen as a major preventive measure in the fight to reduce crime.
Cameras are linked to monitors to enhance access control and provide on-site security with low manpower costs. Systems range from single camera line fed to multi-site applications with fibre optic and microwave transmission. Pictures can either be viewed or recorded on location or transmitted to remote sites.
There are varied applications where CCTV can be useful. The cameras can be installed internally and externally and come in many shapes and sizes all of which are suitable for the correct environment.
Whatever system you choose will have the desired affect both against the criminal by deterring them from committing crime and making you feel safer both at day and night.
What is CCTV?
CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes.
CCTV relies on strategic placement of cameras, and observation of the camera’s input on monitors somewhere. Because the cameras communicate with monitors and/or video recorders across private coaxial cable runs or wireless communication links, they gain the designation “closed-circuit” to indicate that access to their content is limited by design only to those able to see it.
Mobile and Remote CCTV
With advances in mobile and internet technology your images can also be controlled from your phone or from any other place providing you have an internet connection. Ideal for those on holiday, in the office or simply for people that cannot be in two places at one time.
Free No Obligation Survey
With many years experience in consultancy, design, installation and servicing A Matter of Security Limited will find the correct CCTV system for you.
Your CCTV systems design will depend on several factors. Our surveyor will advise you on your exact requirements and discuss all the options available to you. You can be completely confident that we have a solution for your premises.
The CCTV System can be integrated with other security systems that you may already have in place.
A Matter of Security carry out work to the highest of industry standards by our approved engineers.
Analogue CCTV is the oldest of all the CCTV platforms. It uses coaxial cable to transmit analogue signals over cable lengths of around 200m, without being repeated or amplified. Analogue CCTV is the most proven platform for CCTV, but is being replaced by higher resolution platforms like IP and HD-SDI
Benefits of Analogue
- Easy to source
- Well proven and reliable
- Smooth motion
- Less complex to implement than IP or ONVIF
Drawbacks of Analogue
- Based on old technologies
- Lower picture quality in most cases
- No inbuilt intelligence or analytics on the camera
- No ‘edge storage’ options available from camera
For every analogue camera you wish to install, you must have a coaxial cable run to the location of the camera.
Each analogue camera you add to the system must be plugged into a spare input on a DVR (Digital Video Recorder). If no inputs are available you must purchase another DVR unit with enough inputs.
High Definition Serial Digital Interface (HD-SDI), also known as the SMPTE 292M standard, is an interface standard that allows the transmission of high definition video over coaxial cable at speeds of around 1.485 Gbit/s. The cable length will vary depending on the quality of the video you require and the quality of the cable used.
The maximum cable length for HDcctv™ 720p and 1080p standard is 100 metres. If you do not require HD resolutions, cable lengths can be up to 300metres can be used. This broadcast television technology has been technically proven through application in television studios worldwide since the late 1990’s.
Although HD-SDI is new to video surveillance applications, HD-SDI has been around for many years in Television broadcast production), the high cost is what has kept HD-SDI out of the mainstream. This is now changing with more manufacturers producing SDI equipment at a more competitive price. Since many organizations have existing coaxial based analogue CCTV networks, the upgrade path to High Definition CCTV will be less expensive by utilizing HD-SDI technology rather than IP.
HD-SDI has the potential to solve many common issues associated with both conventional analogue CCTV and IP based systems, some of these being scalability to High Definition and implementation complexity and cost. It’s still early days for HD-SDI, hardware availability is improving.
Benefits of HD-SDI technologies
- Works with existing coaxial cabling
- Near zero latency – Very smooth motion
- No network configuration or modification needed
- Recording is immune to IP network interruptions
- Less complex than IP based systems
Drawbacks and considerations for HD-SDI
Poor quality coaxial cables can affect HD-SDI performance. Newer HD-CVI is now more forgiving that HD-SDI when it comes to bad quality cabling.
HD-SDI cameras cannot be used directly for edge storage. Current CCTV HD-SDI standards only allow for 720p, 1080p (1920×1080 pixels) resolutions whereas some IP cameras can support resolutions of over 10Mega pixels (3648×2752 pixels) and higher.
With the exception of HD-CVI & HDcctv V2.0 AT, configuration of HD-SDI cameras must be performed physically at the camera, which can make maintenance more tedious and time consuming.
How Good is HD Video
IP video surveillance devices use the same communication medium and protocol that most computer networks use, that being Cat5 cabling and the IP protocol, which is the same protocol the ‘internet’ uses.
A video codec in the form of a bitstream is encapsulated into IP packets and sent down this medium to an NVR (Network Video Recorder) to record the video and to Users who wish to monitor this video stream.
An IP based surveillance system also allows for better centralized management of the entire CCTV network and the versatility to integrate access control and building management into one unified security solution.
Benefits of IP video technologies
- Very high resolution options
- Multi-stream options give you more versatility
- Highly scalable
- Ability to remotely configure cameras, reducing TCO
- Cameras can be used for edge storage
- Onboard video analytics processing
- Allows for centralized management of entire CCTV network
- Integrated wireless options
Drawbacks of IP video
- Large HDD storage required
- Can be more expensive to implement
- Motion can be less fluid than analogue or HD-SDI solutions
Data Protection Act
Businesses that process and collect CCTV images on their premises are required to register and comply with the Data Protection Act and its Code of Practice and we can help you comply with this legislation.