Network video surveillance based on IP cameras and IP servers.
IP systems have many advantages over analog systems. These advantages include:
— Progressive scanning, which allows you to shoot and capture the entire image at once, unlike analog interlaced scanning.
The image of a fast-moving object captured by an analog camera is always blurred.
In a system with progressive scanning, there is no effect of shaking, stepped contours or blurriness.
In the context of video surveillance, this feature is critical for the user, as it allows the operator to view details of moving images — for example, to see the face of a person who has run away.
— Power over Ethernet (PoE).
Even with 50 or 100 cameras installed, there is already significant savings.
In addition, the PoE option allows you to power the entire video surveillance system together with the cameras from a single power source, as well as use uninterruptible power supplies, allowing the system to function even during power outages.
— Resolution in megapixels.
With high resolution, network cameras provide more detailed images and cover larger areas, so you can see the burglar's face and what he takes away.
In addition, the increased resolution of network cameras allows for functions such as digital pan, tilt, and zoom, which is necessary when working with archives.
— Integrated pan, tilt, and zoom (PTZ) control. An analog camera with PTZ functions requires a separate cable in addition to the video cable. This is an expensive and bulky solution.
The technology used for network cameras allows for PTZ control over the same network that transmits the video signal.
Moreover, network cameras can include input and output signals, such as alarms and lock control.
This allows you to reduce cable costs, funds and increase functionality and integration capabilities.
— Integrated audio signal.
In an analog system, sound transmission is impossible, unless a separate cable is laid.
A network camera solves this problem by recording sound with the camera itself, synchronizing it with the video signal, or even integrating it into the same video stream and sending it for monitoring and/or recording over the same network.
Audio communication can be completely bidirectional, allowing interlocutors to talk through intercoms.
The economic benefit of implementing an IP system instead of a conventional analog-digital system becomes noticeable when there are 40 or more cameras, so we recommend such systems for large facilities or where the advantages of megapixel cameras can be used.
Network video surveillance rightfully takes its place on our list, being modern and technologically accessible