1. A method for handling analog signals, the method comprising: performing, by one or more processors and/or circuits in a video system: collecting motion metric (MM) values, for pixels in a video image, within a noise level interval over a plurality of noise level intervals; and determining a noise level for at least a portion of said video image based on a noise level that is calculated for at least a portion of said plurality of noise level intervals based on said collected MM values for each pixel in said at least a portion of said video image in which a detection value is less than or equal to a threshold value.