Patent ID: 7194093

Claim:
A measurement method for aurally compensated quality evaluation of audio signals comprising: comparing an audio test signal to a source reference signal; breaking down the test signal and the reference signal after a prefiltering step into a frequency range using a filter bank the filter bank having a characteristic and filter output signals; subsequently time-domain spreading the filter output signals so as to form an aurally compensated representation of the test signal; and comparing the aurally compensated representation of the test signal to an aurally compensated representation of the reference signal, wherein the filter bank is aurally adjusted, and an undamped sinusoidal oscillation having a filter mid-frequency is generated from the test signal by recursive, complex multiplication, the sinusoidal oscillation being discontinued by subtracting the test signal delayed by an amount of time equal to a reciprocal value of a filter bandwidth and multiplied by a phase angle corresponding to the delay.