A CDE Definition
video capture board
An expansion card that provides inputs and outputs for analog and digital video. It is used to link video cameras, camcorders and tape decks to the computer for editing. Analog video inputs are converted to digital YUV or RGB color spaces for processing and converted back to analog formats for analog destinations. Capture boards that support SDI connections are used for high-end video editing. See SDI.
A High-End Video Capture Board
(1) See software-defined infrastructure, Single Document Interface, Strategic Defense Initiative and Switched Digital International.
(2) (Serial Digital Interface) A hardware interface for transmitting digital video. SDI uses a high grade of coaxial cable and a BNC connector with Teflon insulation. It also supports optical fibers with ST, SC and FC connectors. Following are the common formats transmitted over SDI. See ITU-R BT.601, BNC connector, fiber-optic connectors and serial interface.
SD-SDI Aspect Transfer
(Standard Definition) Ratio Rate
Digitized NTSC (4FSC) 4:3 143 Mbps
Digitized PAL (4FSC) 4:3 177 Mbps
Component ITU-R BT.601 4:3 270 Mbps
Component ITU-R BT.601 16:9 360 Mbps
HD-SDI (High Definition) See HD-SDI.
Component ITU-R BT.709 16:9 1,485 Mbps
Dual-link (two cables) 2,970 Mbps
3G-SDI (3 Gbps)
One-cable version of HD-SDI 2,970 Mbps
Blackmagic SDI Capture Board
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