(A) the concept
Capture card is mainly to capture the outside world photoelectricity, video, audio, and other analog signals and its digital introduction into the computer for digital processing of the capture device, the main image capture card, video capture card, audio capture card (such as sound card), data acquisition card, and so on.
(2) Usage
Capture card is widely used in security monitoring, education courseware recording, large screen splicing, multimedia recording video, conference recording, virtual studio, virtual reality, security X-ray machine, radar image signal, VDR recorder, medical X-ray machine, CT
(3) A more detailed introduction
You can see the "capture card" in the Baidu encyclopedia's entry --//. history/72792638