Ip Cctv

Potential for IP video surveillance video of modern cities
video surveillance systems based on Internet protocol (IP) provide a remarkable improvement features, including live monitoring, video recording and playback of archives., recording, playback Preview

The heart of every CCTV system is digital video recorder (DVR) that processes signals camera (video) for live monitoring, recording and playback. The DVR-based systems have a limited number of video channels - extension of such a system, it will use the next DVR / DVR. DVR can operate as independent units, or can be managed on the IP network via an external management software. A disadvantage of non-IP systems is a limited number of frames per second that can be processed / played / recorded and limited image resolution of the recorded material. It is particularly embarrassing, as when the area is monitored by some one camera and the image resolution is insufficient for identification purposes.

CCTV over IP CCTV DVR systems are based on PC servers. Their potential is limited only by the characteristics of the components used. If higher requirements, simply modify the components that limit the ability of the system. Normally, an extension of the system is to upgrade license (next channel), and the new material does not disturb the structure of the system.
Another important feature of IP video surveillance systems is scalability, associated with their distributed structure. The system can be based on a number of servers and workstations. functional properties of such a system depends on its configuration and access rights of users. Registration servers and clients can be physically located anywhere in the system. Cameras
The main characteristic quality of a camera is the image resolution. Because TV standard conditions, for example, in PAL it is limited to 720 x 576. Digital systems do not impose such restrictions - the image size / resolution can be formed freely. In addition to the equipment popular D1 (compatible PAL: 720 x 576), megapixel cameras quickly increase market share. Camera 1.3 Megapixel (1280 x 1024) has three times more pixels than standard PAL camera. As required, it can be used for 2 Mpix, 3.1 Mpix or even 5 megapixel cameras.
Megapixel cameras can monitor much larger area than standard devices, or - with the goal of others / goal setting - can provide more detailed images. It is particularly important for example in the case of the identification license plates.
Broad and effective video surveillance systems are using "smart" cameras that relieve the main system functions. DVR / NVR only record the video streams that are already compressed in cameras (and the recording process is triggered for example by detecting movement also made by the cameras). These "distributed intelligence" makes the system more reliable and efficient - the server does not process all the information, the transmission is limited to pre-processed data. Comparison of different video resolutions of data
analog surveillance systems were built on the principle "one camera - a cable," so a 50-camera system required to use 50 cables should be connected to the DVR. Packet transmission to change the structure of the system completely. According to the transmission media and other factors, there is some available bandwidth that can not be exceeded. It is virtually the only restriction. If, for example, the bandwidth is 50 Mbps and a single camera is streaming 5 Mbps, this means that the total capacity of the link allows you to use 10 cameras, for example at the same time. The technology does not require it.