Apple Final Cut Pro 7 - Manual (Page 196)

SDI
Serial Digital Interface (SDI) is the standard for high-end, uncompressed digital video
formats such as D1, D5, and Digital Betacam. Many devices can send both video and
audio data through a single SDI connection.
BNC connector
HD-SDI
High Definition Serial Digital Interface (HD-SDI) is a higher-bandwidth version of SDI
designed for the extremely high data rates required by uncompressed HD video. Like
SDI, HD-SDI is capable of sending both video and audio through a single connection. The
following decks have HD-SDI interfaces: DVCPRO HD, D-5 HD, and HDCAM decks.
Some devices provide even higher data rates by pairing two HD-SDI channels together
(known as dual-link HD-SDI). Uncompressed HD RGB video and other digital cinema
formats can be transmitted using dual-link HD-SDI.
SDTI
Serial Digital Transport Interface (SDTI) is based on SDI, allowing native video formats to
be sent in real time within an SDI video stream. SDTI does not define a specific video
signal format but instead uses the structure of SDI to carry any kind of data. This allows
video facilities to use their existing SDI patchbays and routers to transfer other native
video formats, or transfer any kind of data. For example, some DV decks can transfer DV
via SDTI, which means native DV can be transferred long distances over existing coaxial
cable instead of via the usual FireWire connection. Other formats, such as HDCAM and
MPEG, can also be transferred via packets within an SDTI transport stream.
VGA
VGA interfaces use a 15-pin D-subminiature connector to transfer analog RGB video and
sync information between computers and computer CRT displays or video projectors.
This connector and signal format is being replaced by newer display formats such as DVI
and HDMI. However, adapters are available to convert between DVI and VGA.
VGA connector
196 Chapter 12 Connecting Professional Video and Audio Equipment