What Is Digital Video Anyway?

How video works

Analog video

In order to understand digital video, we have to get a clear grasp of what video itself is, and how digital video differs from analog video, the common format used in most televisions and consumer video tape recorders. Like film, video is simply the transmission of time-based visual information accomplished by the rapid sequence of many still images. We see the illusion of real motion because the still images replace each other very rapidly on the screen. In film, the rate of these images is 24 frames, or individual images, per second. In NTSC (National Television Standards Commission) ...

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