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Glossary: INTERLACED VIDEO

In traditional television systems each frame of a video pitcure is divided into two fields, the first field containing the odd numbered scan lines and the second field containing even numbered scan lines (the two fields being interlaced). Historically this was done because televisions could not re-draw frames quickly enough to prevent CRT phosphors at the top of a television screen from fading before the gun reached the bottom of the screen, causing the picture to flicker.

Interface
IRE
ITU-R BT.601-2

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