dot crawl


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dot crawl

An artifact of composite video sources in which dots seem to crawl between contrasting colors. This is the result of an inexpensive comb filter that does not entirely separate the luma from the chroma (the black & white from the color). Also called "cross-luma."


Dots Crawling
Dot crawl (cross-luma) is noticeable at the boundary of contrasting colors such as blue and yellow. (Image courtesy of Home Theater and High Fidelity, www.hometheaterhifi.com)
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References in periodicals archive ?
Chrominance and luminance filters limit dot crawl effects and tearing effects are managed using a dedicated tearing effect signal.
58 notch filter reduces dot crawl, and Video Noise Reduction helps smooth the picture.
By comparison with the original Digital Home Theater(TM) unit, black levels are significantly better, the colors are more vivid and dot crawl is virtually non-existent.