Patent ID: 8036765

Claim:
A method of qualitatively evaluating a digital audio signal, comprising: calculating, using a measuring system, in real time, in continuous time, and in successive time windows, a quality indicator, wherein said calculating further comprises: a) calculating a temporal activity of the digital audio signal in each of said time windows, b) calculating a sliding average over N 1 successive values of the temporal activity, and c) retaining a minimum value of M 1 successive values of the sliding average, and wherein: said quality indicator is obtained from said digital audio signal that represents an analog audio signal, said quality indicator is associated with each of said time windows, and said quality indicator comprises a number of elements which is at least one hundred times less than the number of audio samples in a time window, said number being from 1 to 10; and directly estimating quality of said digital audio signal as a function of said quality indicator.