When video images are transmitted over cable, skew is a distortion in the image caused by the late arrival of one or more of the color signals. The delayed color signal is shifted to the right of other colors in the image, resulting in poor image quality.
Skew is caused when high-resolution video signals are transmitted long distances over twisted pair cables. If the rate of twist varies between the pairs, each pair may be a different length and this can cause skew. A zero-skew cable is specifically designed for video transmission and has twisted pairs that are exactly the same length so the red, green and blue signals of the video arrive at exactly the same time.
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