IP camera is a security camera with a special interface operating on the basis of IP-protocol (TCP / IP), that allows transmitting digital data on the network. In other words, it is a camera and a mini-computer in one housing.
The main difference of its functioning from an analog video camera is that the image from the matrix is not translated into an analog electromagnetic signal, but transmitted in packets in digital format to the receiving device (monitor, video recorder, video server or PC). This ensures smooth transmission of video signals without influence of electromagnetic fields on its quality.
Connecting an ip camera
For connection of the ip camera, a standard twisted pair CAT5E cable is used, similar to the one used at routing computer networks. This is a widely used high-speed cable with data transfer of up to 1000Mbs, which is also universal and cost-effective. The CAT5E standard cable is applicable for both indoor or outdoor cable routing with the use of protection pipes - PVC conduits or its all-weather version is used.
For connecting the ip cameras themselves, a standard RJ-45 network connector with excellent connectivity and reliability is used.
Power supply for ip cameras
Modern ip cameras need only one cable for transmission of both video data and power supply. A special PoE (Power over Ethernet) standard is used for that. The main advantage of this technology is using only one set of cables - both for digital transmission of signals and for electricity supply without affecting the quality of the transmitted video signal and smooth signal transmission.
Resolution and image quality
Video Surveillance IP Cameras have a number of considerable advantages of the image quality comparing to analog video cameras.
Resolution is one of the main advantages of digital systems over analog ones. The resolution of standard analog cameras is no more than 700 horizontal lines. High resolution of analog cameras of AHD, SDI, CVI and TVI formats is 1920 × 1080, that is 2 megapixels.
While many digital ip cameras have progressed much more, for example, most models have a resolution of 3Mpx or 4Mpx, but there are even models with a resolution of up to 12Mpx. As a result, the image quality is by several times more detailed than of usual analog cameras and can be zoomed in by several times to see the smallest details.
In addition, as the ip camera uses its own image processor, it also has additional functions that are not available in analog CCTV cameras.
Wide Dynamic Range
There are situations when there is too much difference between dark and light frame areas of the ip camera frame. Areas of the frame with more intense light stream at recording will look too light, while areas of the frame with poor illumination, on the contrary, may look dark. The reason is that the camera must record both light and dark areas at one exposure.
The WDR function provides a special recoding mode, when the camera records two frames with different exposures at the same time.
How does it work? The ip camera records the first frame at a minimum exposure time, as a result a too bright light stream does not have enough time to light areas of the image. The second frame is recorded by the ip camera with maximum exposure and during this time the matrix manages to capture the image of the most shaded areas. Thus, there are two frames: one is adapted best for viewing lit objects, the second allows viewing too dark objects in detail. Then, these two frames are combined into one. The resulting frame has advantages of each of the two originals and does not have their drawbacks at the same time.
Video image compression
The image matrix data is compressed in several ways: per-frame (MJPEG) or as a stream (MPEG-4, H.264, H.265). Some models of ip cameras transmit uncompressed data. IP-based DVRs use TCP, UDP transport network protocols.
The best video compression protocol (codec) today is H.265, it allows recording video twice more compact with the same image quality as H.264, which allows increasing the recording time twice and storing video on the DVR hard drive or to increase the image quality in comparison with the H.264 codec.
IP Network Video Recorder
Unlike usual analog cameras, the video signal is transmitted from the ip camera to the recording device in a digital encrypted form, which excludes the possibility of its unauthorized viewing and each ip camera has its unique ip address on the Internet.
The video image is recorded by a special local NVR device like in usual analog cameras and is safely stored on the hard drive or multiple RAID backup drives. The NVR is connected to the Internet and has secure encrypted access from anywhere in the world allowing an owner to watch live video from any ip camera any time or open and view the recorded archive from any device, such as a computer, tablet or smartphone.
Installation of ip cameras
The installation of ip cameras is a little more complicated than usual cameras, as each camera requires setting ip addresses, the video stream quality and a number of internal parameters, therefore it should be entrusted to certified specialists.
We are dealers of the leading suppliers of professional ip cameras for use in private and commercial facilities and offer professional installation and setup of video surveillance systems in Toronto and GTA. We will calculate the cost of ip surveillance for free and offer the best options.