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judderInformal chiefly Brit
abnormal vibration in a mechanical system, esp due to grabbing between friction surfaces, as in the clutch of a motor vehicle
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
judderA shaking or wobbling effect in a video image. Judder is often caused by the conversion of a 24 frames-per-second (fps) movie to a 30 or 60 fps video format, or when viewing 24 fps content on a 60 Hz monitor. See telecine, flicker and adaptive sync.
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