With the on-screen displays, under the User Mode settings...does anyone know what the heck the MPEG Digital Noise Reduction options do? There is the 3D-NR (0 to +4), Block NR (0 to +3), and Mosquito NR (0 to +3). The manual says they reduce / smooth noise. I would assume that the higher the setting, the less noise. Do you use these settings?