What is HD-SDI Camera?
HD-SDI CCTV cameras also known as HD security cameras, are quickly gaining popularity as a high definition video surveillance solution. With the advent of HD-SDI technology for security cameras, users can now capture 1080p resolution video using the same RG59 or RG6 coaxial cable that is used by traditional CCTV cameras.

What is HD-SDI?
HD-SDI stands for High-Definition Serial Digital Interface, It is the common term for a high-definition digital video transmission standard known as SMPTE 292M. HD-SDI allows you to connect 1080P (1920 x 1080) and 720P (1280 x 720) CCTV Cameras to a DVR over standard Coax cable. To do this you will need both a HD-SDI camera and an HD-SDI DVR. PST sell both of these items;

What are the Advantages of HD-SDI?
The advantage of this technology allows you to use your standard coax cable on your old DVR system and upgrade to High Definition video surveillance system. Prior to this type of DVR system you would have to use IP cameras and run new CAT 5 cable in order to get HD video. In addition with IP cameras you need to configure the cameras, and router to see each other on the network. With HD-SDI you connect just like a standard analog camera;
HD-SDI CCTV cameras are capable of true HD 1080p resolution (1920 x 1080). This higher resolution is the same as a high definition television and movies that consumers are use to. The SDI technology behind HD-SDI CCTV cameras is the same as the video cameras that capture video footage for “high def” motion pictures.
Some traditional CCTV cameras can actually capture slightly larger images than D1, but are unable to take advantage because traditional CCTV DVRs are limited to 704 x 480 resolutions, which is why D1 is the accepted max resolution in the CCTV industry.