Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint, or mesh wireless links. Effective video surveillance based on particularly clear image data. Depending on the area of application, location and individual security needs, the range of required camera functions varies for the type of security needed. In the following, we present you with different technologies – IP, HD-SDI, AHD (HD-TVI) and analog – to give you an initial overview of the strengths of the individual camera types.
HD-CVI stands for High Definition Composite Video Interface. This is a brand new technology in the security camera industry that provides a different method of transmitting video signals over coaxial cables. Until this new technology surfaced, analog CCTV video was limited to 960h video resolution. 960h resolution refers to the 30% increase in horizontal resolution, so the maximum analog resolution up to this point was 960 x 480 pixels. This has been the accepted limit to analog video transmission for many years. In order to achieve greater transmission would mean switching to digital video using either HD-SDI (High Definition Serial Digital Interface) or Network IP video formats.
Enter HD-CVI, a true alternative to Network IP solutions. HD-CVI uses a licensed video transmitter and receiver that is able to transmit up to 1080p video resolution (1920 x 1080) in an uncompressed format over the same standard coaxial cable that is used for standard CCTV cameras. This uncompressed video format is able to transmit over longer distances than either HD-SDI or Network IP cameras and without the latency and bandwidth issues that are so common. Additionally, HD-CVI is able to transmit video, audio and control (OSD or PTZ) over a single coaxial cable instead of requiring separate cables for each transmission.