AHD CCTV is an analog high definition closed-circuit television video surveillance standard that uses coax cable to transmit HD video from security cameras to DVRs. AHD supports 720p and 1080p HD video resolutions.
HD-CVI is a revolutionary technology that can transmit high definition video quality over standard RG59 Siamese cable. This technology is also Ideal for installations where there is Siamese cable already installed and it makes this type of configurations a breeze lowering the cost of labor and equipment
HD-TVI cameras - new technology for analog HD solution. ... HD-TVI means High Definition Transport Video Interface, HD-TVI is based on traditional coaxial cable for video and data transmission, it supports not only 720P/1080P video signal, but also including audio, data signal over long distance up to 500 meters.
Serial digital interface (SDI) is a family of digital video interfaces first standardized by SMPTE (The Society of Motion Picture and Television Engineers) in 1989. For example, ITU-R BT.656 and SMPTE 259M define digital video interfaces used for broadcast-grade video. A related standard, known as high-definition serial digital interface (HD-SDI), is standardized in SMPTE 292M; this provides a nominal data rate of 1.485 Gbit/s