They are different CCTV technologies?
Analog technology is the standard in video surveillance.This technology is also known as CCTV which in English means closed circuit television.
The technology of this image data is transmitted in an analog manner ie by a cable which is not called BNC from the camera to a recording apparatus, where they are stored or displayed.
This technology has several advantages such as independence of the pass bands or radio network, as well as the way of exclusive transmission and finally the real-time display.
Indeed, the image data is “captured” inside the lens, more focal length determines the viewing angle of the camera but also the length of the detection range.
The transmission of this signal analog technology is generally carried by coaxial cable.
The display image data is usually done on a screen connected to the recorder. With the corresponding networking, the display can also be made via Internet PC or on portable devices.
In the technology of the IP video surveillance or network-based, cameras compress the video signal and transmit it over the network called LAN or WLAN.
The data is saved and decompressed on the PC or network recorder connected and displayed on the monitor. A decisive advantage of the IP technology is the highest resolutions, the field of megapixel.
This technology allows to carry audio and video through a computer network. The cameras are connected to the network via WiFi or via a network cable and do not need to be connected directly to the recorder. They can stream the videos locally or via the Internet and then without recorder.
As for analog cameras, the image information contained in the light recorded through the lens. For cameras with megapixel resolution, be sure to use the same quality goals.
HD-SDI in English means High Definition Serial Digital Interface, that is to say specifically that the transmission is uncompressed digital HD signals via an analog interface.
This technology via a single cable KX6 high quality or HD-SDI cable to transmit high definition signal.Installation is as simple as analog video and gives you a execellente quality, the image quality of this technology is impeccable.
CCTV this technology now also allows to transmit and represent analog surveillance images in high definition and in real time.
This video surveillance technology with many advantages such as high-resolution surveillance images are as Full HD, high quality. As for HD-SDI cameras they offer high resolution video in HD quality but also with resolutions up to 2 megapixels.
The HD-SDI video surveillance technology effectively and gathers the advantages of analog and digital technology: Megapixel video surveillance in real time.
HDCVI in English means High Definition Composite Video Interface , or in French Interface composed of high definition video.
CCTV Technology HD-CVI is a new technology almost equivalent to the HD-SDI technology but actually allows to use classical KX6 cable lengths up to 700m. This technology provides a high definition quality HD1080P image, a little lower in quality to the HD-SDI CCTV and IP technology but still much higher than analog.
In deluxesurveillance, the video signal transmitted in a traditional analog system via coaxial cable has a format known as CVBS or simply composite video. This format allows only offer video and no option to add audio and standard definition signals.
You should also know that HDCVI brings a lot more features compared to conventional analogue systems for both recorders, cameras and for ease of wiring.
The HDCVI products are high performance with quality and impeccable reliability.
Comparative table of different video technologies