1. An objective quality assessment method for estimating a perceptual quality degradation of a processed signal, the method comprising the following steps to be executed on the processed signal and a reference signal: a) splitting the reference signal and the processed signal into associated frame-pairs; b) selecting a first frame-pair; c) creating a reference residual signal and a processed residual signal for the selected frame-pair; d) calculating separate ratios of p-norms on both residual signals for the selected frame-pair; e) calculating and storing a per-frame quality estimate based on the ratios of p-norms for the selected frame-pair; f) iteratively selecting additional frame-pairs, and repeating steps c) to e) for each additional frame-pair; and g) aggregating the calculated per-frame-pair quality estimates to provide an objective per-signal quality estimate that is proportional to the perceptual quality degradation of the processed signal.