ADAPTIVE ENHANCEMENT OF SIGNAL-TO-NOISE RATIO IN TELEVISION IMAGERY

摘要

12985ADAPTIVE ENHANCEMENT OF SIGNAL-TO-NOISERATIO IN TELEVISION IMAGERYAbstract of the InventionA noise reduction filter for a television receiver inwhich two running averages of video signal amplitude aregenerated over regions of the video picture where thebrightness level is substantially constant. One or theother of the averages is used to control intensity toobtain a reduction of random noise in the video signal.In areas of the picture where rapid changes in intensityoccur, the averages are not used in favor of theunmodified video signal.