1. A method of improving temporal consistency of an enhanced signal representative of at least one frame using a sharpness enhancement algorithm with an enhancement gain, said method comprising the steps of: receiving the enhanced signal including at least one frame; obtaining an enhancement gain associated with the sharpness enhancement algorithm for each pixel in the frame; determining an updated enhancement gain for the enhancement gain of each pixel in said frame; storing said updated enhancement gain to gain memory; and applying the updated enhancement gain to said sharpness enhancement algorithm to improve temporal consistency of said enhanced signal.