Scanning and Interlacing
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Skip Navigation LinksHome : Video course : Module 1: Camcorders : Technical : Scanning and Interlacing

With progressive scan, an image is captured, transmitted and displayed in a path similar to text on a page: line by line, from top to bottom.

The interlaced scan pattern in a CRT (cathode ray tube) display completes such a scan too, but only for every second line. This is carried out from the top left corner to the bottom right corner of a CRT display. This process is repeated again, only this time starting at the second row, in order to fill in those particular gaps left behind while performing the first progressive scan on alternate rows only.

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