Flicker Filter
Flicker Filter – Video data from a VGA is not interlaced. This data must be converted into interlaced format for display on a TV. If every second line is discarded of the non-interlaced data, flicker may occur if, for example, video information is contained in just one noninterlaced line. Flicker will also be perceptible at the top and bottom of multilane objects. A flicker filter overcomes these problems in computing a weighted average of two or three adjacent lines (noninterlaced) for each line of output (interlaced).
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