A network camera based on Internet Protocol (IP) can be described as a combination of camera and a computer in one unit. It captures and transmits live images directly through a network IP, allowing local or remotely downloading, storing and managing video to authorized users through an infrastructure-based on Ethernet network. A network camera has the IP address.
It connects to the network and has a built-in web server, FTP server, FTP client, e-mail client, alarm management, programmability, and much more. An IP camera does not need to connect to a PC. It operates independently and can be placed wherever there is an IP network connection. In contrast, a Web camera, require connection to a PC via a USB or IEEE1394 and a PC to operate.
An analog camera is a unidirectional transporter of signals that stops at the level of continuous recording on video (DVR) and requires operators, while a network camera is fully bidirectional, incorporated easily and leads the rest of the system with the hardware and software features. It communicates with several applications in parallel, in order to perform various tasks, such as detecting motion or sending video streaming.
In addition to video, a network camera also includes other functions and information that are transferred through the same network connection, e.g. motion detection, audio, digital inputs and outputs (which can be used, for example, to trigger alarms or open lights), serial ports for serial data and control of rotary / lift zoom (pan / tilt / zoom )mechanisms. The integrated image memory (image buffers) into a camera can also save and send images collected before an alarm is displayed, which gives us additional security.
What is a network video?
The network video, often referred to as IP, is used for specific applications such as security surveillance and remote control. It is a system that gives to users the ability to control and video recording through a network IP (LAN / WAN / Internet). In contrast to the analog video systems, network video uses the network, rather than the point-to-point wiring, as the backbone for transferring information. The term “network video” refers to video and audio transfer through the system. In a network video application, digitized information is transmitted as a continuous stream of bit in any location in the world via a wired or wireless IP, allowing visual control and recording moving picture with audio.
The advanced function of network video makes it particularly suitable for applications involved in security surveillance. The flexibility of digital technology enhances security personnel’s ability to protect people, property and areas.- Such systems are therefore a great choice for businesses that currently use the CCTV (old analog camera system).
The network video gives users the ability to gather information for all the key points of an operation and watch them in real time. This makes the technology ideal for monitoring of equipment, people and places locally and remotely. Application example is our project, where we replace the use of scarce and expensive manpower that needed only during the summer months for monitoring of countless forest areas of our country. With our system, we can have access to the space in real-time with video image at any time by any computer anywhere, provided that the terminal station connected to the system to has access to the Internet. The network video camera provides an easy way to be recorded and be distributed high quality video over any type of IP network or the Internet. The video can saved in remote locations for further processing and security, and the information can be transferred via the LAN or the Internet. This means that even in fire-fighting operations, government can control the situation in real time and to take appropriate decisions on the allocation of forces. With our system we can access in real-time with video image at any time by any computer anywhere, provided the terminal station which is connected to the system to have access to the Internet.
Additional features and application integration
An additional feature of the network video system is the integration of applications for specialized purposes such as, in our case, for the automatic detection of fires in forested areas, and for producing an alarm signal for the controller of the shift. Thus, only one person can monitor at the same time several points at a central location, without having constantly to monitor the displays; but instead he can wait the alarm signal generated by the application that can detect the color changes of a region (pattern recognition).
Flexibility and scalability
A network video system can be expanded by adding more network video cameras. This is easy and is done regardless of whether the new video cameras are to be placed on the same site or at a new location which connects through Internet. We can choose exactly what we need today, and remodel later the system to satisfy at anytime our increasing needs. New technologies, extra video-cameras, and extra storage ability meet international standards and are easily combinable together.