MUSE DECODER WITH COLOR NOISE REDUCER

摘要

PURPOSE:To perform noise reduction to chrominance signals utilizing exact correlation and further, to effectively perform the noise reduction for the noise converted to a conspicuous lowfrequency area by time expansion. CONSTITUTION:An adaptive type color noise reducer 31 provided in the rear stage of an adaptive mixing processing means 20 performs the noise reduction by utilizing the fact that line sequential color difference signals lead as the chrominance signals are correlated between two frames. At this time, by motion signals indicating the motion of video images from a motion detection processing means 15, a noise reducing amount is made small in an area with the large motion of the video images, the noise reducing amount is made large in the area with the small motion of the video images and the noise reduction of the linear sequential color difference signals is adaptively performed.