Patent ID: 6757014
Filing Date: 2004-06-29
Classification: H04N

Abstract:
A video signal noise reduction apparatus comprising:pixel data outputting circuit responsive to a pixel clock signal for outputting data of a center pixel and data of peripheral pixels from a video signal; difference calculation means for calculating differences of said data of said peripheral pixels from said data of said center pixel; correlation pixel data detecting means for detecting a portion of said data of said peripheral pixels showing high correlation with said data of said center pixel in accordance with said differences and a threshold value; counting means for counting said detected portion of said data of said peripheral pixels from said correlation pixel data detecting means; correlation pixel selecting means responsive to said correlation pixel data detecting means for selectively outputting a portion of said differences of said portion of said data of said peripheral pixels; summing means for obtaining a sum of said portion of said differences in accordance with said counting result; dividing coefficient generating means for generating a dividing coefficient of 2n in accordance with said counting result of said counting means; dividing means for dividing said sum with said dividing coefficient; and adding means for adding said dividing result to said data of said center pixel to generate an output video signal; wherein said summing means includes weighting means for weighting each of said portion of differences in accordance with a predetermined priority and said summing means obtains said sum from said weighted differences.