视频采集卡（Video capture card）.doc

视频采集卡（Video capture card） concept Video capture card, also known as video capture card, can use it to obtain digital video information, and store it and play it. Many video capture cards can capture audio information while capturing video, so that the audio part and the video part are synchronously saved and played synchronously when digitized. Video capture card Video Capture Card, its function is to collect video signals to the computer, in the form of data files stored on the hard disk. It is essential to our video processing hardware, through it, we can put the video signal from the camera with the camera onto the computer, using video editing software for digital video post editing, such as adding, filtering, shearing picture and sound settings, ytterbium subtitles transition and the effect of adding various video effects and so on, finally finished editing the video signal into the standard VCD, DVD and online streaming media format, convenient communication from the video signal source and acquisition card interface, video capture card is divided into two categories: one is the analog acquisition card, the other is digital acquisition card. [Combo Video capture card: T501] Two in one video capture card: T501 The analog acquisition card collects analog video signals into the PC through AV or S terminals, and converts analog signals into digital signals. The video signals can come from analog cameras, TV signals, analog video recorders and so on. The data acquisition card through IEEE1394 digital interface to digital to digital form, the digital video signal acquisition to lossless PC, the video signal source is mainly from DV (digital camera) and other digital devices. One important difference between analog acquisition card and data acquisition card is: use the digital acquisition card, in the process of collection of video signal without loss, can be guaranteed with the original video source and the use of simulation results as like as two peas, video signal