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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
Blackmagic Design's DeckLink HD card supports standard and high definition and all major analog and digital sources and destinations. The four BNC connectors on the card (top) are SDI links, and all the cables (bottom) plug into the 15-pin D-Sub connector on the card. (Images courtesy of Blackmagic Design Pty. Ltd.)