Analog camera systems had as fundamental advantages over other technologies due to their low cost. However, the high definition video standards that the industry is evolving towards have been until now out of the scope of analog solutions.
HDCVI (High Definition Composite Video Interface) is a technology whose objective is to overcome this drawback by adding to the characteristic advantages of analog devices the ability to offer solutions in the high definition range to offer a solution adaptable to all kinds of requirements and applications.
Typically, the video signal that is transmitted in a traditional analog installation through coaxial cable has a format known as CVBS or, simply composite video. HDCVI represents a new approach aimed at offering the benefits of modern video surveillance without sacrificing those aspects that have contributed to popularizing analog technology, mainly the cost and ease of installation.
The main features of HCDI are:
Support for high definition solutions (1080p and 720p): Even the most demanding requirements can be met with HDCVI equipment that allows capturing details that until now were only available to other technologies such as HD-SDI or IP.
Longer transmission distance: HDCVI uses a new modulation to transmit the signal, more immune to the attenuation of the coaxial medium and to noise and interference caused by other electromagnetic signals.
Combination of multiple signals in the same transmission medium: the essential signals in any surveillance installation, that is, video, audio and even control signals are transmitted at the same time through the same coaxial cable, which greatly simplifies the deployment of new facilities and lowers the cost of wiring. On the same analog signal that is used for the transmission of audio and video, HDCVI adds a bidirectional channel for the communication of control commands between the receiver and the emitting equipment, that allows operations such as PTZ control, focus control and alarm sending in real time, among others.
CVBS compatibility: In addition to 1080p and 720p high definition, HDCVI devices and cameras can also be configured to use the CVBS format at lower resolutions, so it is possible to use them in installations that already have pre-equipment that does not support HDCVI.
With this technology, you will be able to take advantage of the already deployed infrastructure of your old camera network and add new HD cameras.
HDCVI does not require modifying the basic design of any analog technology-based video surveillance installation. An HDCVI installation looks the same as a traditional installation, this is a star topology in which the cameras are the emitters and the recording equipment.