SECURITY CAMERAS – CHANIA, CRETE
For complete surveillance
and control of your premises!
Protecting a premises undoubtedly requires a reliable surveillance system. At EXYPNA SYSTEMS, in Chania, we offer comprehensive security camera solutions, catering to the needs of both private individuals and businesses.
The state-of-the-art cameras we install feature high resolution, night-vision capability, 24/7 recording and remote monitoring via mobile phone or computer. This way, you know what is happening on your premises at all times, whether you are in or outside Chania.
We offer a range of solutions: from simple cameras for domestic use to sophisticated CCTV systems with multiple monitoring points and advanced management software. All products come with a reliability guarantee, as we work with leading international manufacturers.
Our company’s technical department undertakes the site survey, the installation of the cameras and provides the technical support required to ensure that every surveillance system performs to the highest standard. At the same time, we offer bespoke solutions, tailored to the specific needs of each client.
Closed-circuit television (CCTV)
The term ‘closed-circuit television’ or ‘CCTV’ refers to a system which, in its simplest form, consists of one or more cameras connected to a monitor for the remote surveillance of an area.
The difference between CCTV and standard television is that standard TV broadcasts signals openly to the public. With CCTV, signals are not broadcast openly to the public. CCTV uses wireless or wired transmission to send video from the cameras to a monitor or recording device. Most CCTV systems are used for surveillance, which may include security monitoring.
Fixed wired connection
A fixed wired connection means that your camera will be physically connected to a monitor or other device via a cable. The coaxial cables used are usually similar to standard television cables.
Wireless Connection
Most wireless CCTV cameras use the 2.4 gigahertz frequency band to transmit video footage to a monitor or DVR (digital video recorder). Typically, these frequencies can be adjusted slightly to allow for more than one set of cameras in a specific area. Wireless CCTV cameras operate on this frequency and can transmit more easily through walls and obstacles.
Naturally, a wireless connection gives you greater freedom within your premises, allowing you to position the CCTV camera almost anywhere. Many of these types of cameras need to be connected to a power supply. However, there are some CCTV cameras that are battery-powered.
This system can be expanded to enable video recording using a digital recording device with a hard disk. This device is known as a recorder or DVR.
IP Camera Technology
IP (Internet Protocol) camera technology enables the transmission of video and audio via the internet or a local area network (LAN), providing real-time remote access from a computer or mobile device. It provides high- , ease of installation and features such as cloud recording, motion detection and smart alerts for enhanced security.
There are two types of DVR (Digital Video Recorders). They are either stand-alone devices or hard drives connected to a computer system. The DVR performs tasks similar to a video recorder, except that the images captured by the CCTV camera are digital. The amount of digital footage that can be recorded on a DVR is determined by a number of factors, including the number of frames per second recorded, the number of cameras, the format in which the DVR stores the images and the compression method used (e.g. MPEG-4). Assuming you have 4 cameras recording at 30 fps, and you use a resolution of 320 x 240 – with each camera recording only when is in motion, and use MPEG-4 compression, you should be able to record 20 hours’ worth of footage to fill a 25GB hard drive in approximately 80 hours.
The purpose of the DVR is to provide a centralised view of the current situation as captured by the CCTV system, converting audiovisual data into digital information, recording it onto magnetic storage media, and playing back or searching for events within the stored data. The first obvious difference from a conventional analogue video recorder (video) is the fact that all of the above can be done simultaneously, using fewer electronic components (replacing the video multiplexer) and consumables (cassettes), and is therefore more reliable. The real revolution, however, lies once again in the word ‘information’.
The data is stored in such a way that it acquires an electronic watermark (digital signature) which guarantees its authenticity, both when reproduced by the recorder and when stored on a portable medium. Furthermore, this requires specialised software that permits changes only to parameters relating to the presentation of the information, and not to the information itself. These features enable the stored information to be used as evidence in court, based on certifications issued by specific authorities.
What is achieved through all the above features is the creation of a real-time control centre, which aggregates data (messages, faults, alarms) from all the subsystems that make up the Area Surveillance System, displays it in an integrated manner, and allows access to, configuration of, and retrieval of information from remote equipment. Recording can take place continuously, on a scheduled basis, or when motion is detected in a camera’s image, triggering the system’s alert. This provides a comprehensive system that enables users to make the most of its output data and quickly make the most appropriate decisions based on current conditions. Of course, it is also possible to access the system from anywhere on the network, should the need arise, further increasing the system’s flexibility and availability.
Frequently Asked Questions about Security Cameras
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1. Can I view the cameras on my mobile phone?
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2. Do the cameras record at night as well?
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3. Do I need a special licence to install cameras?
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4. How does an IP camera differ from an analogue one?