What is HD-SDI?
SDI stands for Serial Digital Interface, which is now standard in the TV industry. This standard is also known as SMPTE 292M. SDI has mostly been used in HDTV production and broadcasting in 720P and 1080P high-definition resolutions, which you are likely all too familiar after buying that new flat-screen television set! Well anyway – A few years ago, several surveillance equipment manufacturers began experimenting with surveillance cameras and DVRs based on the HD-SDI standard. Manufacturers wanted the 720p and 1080p HD video resolution to compete with higher-end IP/Network surveillance systems, but without the complex installation process or the higher cost. Hence, HD-SDI cameras began.
In addition, SDI cameras use the same coax cable as analog systems. However, they do require HD-SDI DVRs for compatibilit and HD-SDI fiber extender for long distance. Again, HD-SDI stands for high-definition serial digital interface. I found the following frequently asked questions online, which may help in understanding HD SDI technology:
What type of cable is used to wire HD-SDI CCTV cameras?
Installers can use the same RG59 or RG6 coaxial cable and BNC connectors used with traditional analog CCTV cameras.
Do I need a special type of DVR to record HD-SDI video?
Yes. You cannot use a standard CCTV DVR. The DVR must be specifically made to work with the HD-SDI format. In transmission, the system also needs equipments support SDI signal like SDI fiber extender which could transmit SDI camera video to a very long distance
Remember, with a stunning 720P or 1080p resolution, images will come in clearer than they have ever been before, even at night.
Take note: When looking at the specifications of an HD-SDI product and looking for 1080P, ensure the process or is indeed 1080P and not 720P stretc