HD-TVI, similar to HD-CVI, which is another high definition analogy camera technology. HD-TVI has many advantages include delivering 720p/1080p HD video over traditional coaxial cable, and transmission range is up to 500 meters. The HD-TVI can allow users to upgrade existing analogy system to HD system without hassle. Today, there are many HDTVI cameras are available, they are based on different solution such as Nextchip + Sony/Aptina CMOS sensor, Fuhuan + Sony/Aptina CMOS sensor.