Patent ID: 6064966
Filing Date: 2000-05-16
Classification: G10L,H04R

Abstract:
A method for determining audio quality of an output signal generated by a signal processing circuit with respect to a reference signal, the method comprising the steps of:generating a first signal parameter as a function of time and frequency in response to the output signal;compressing said first signal parameter so as to yield a first compressed signal parameter;generating a second compressed signal parameter in response to the reference signal;determining a difference signal in response to the first and second compressed signal parameters;generating a quality signal in response to the difference signal, through integration with respect to frequency and time;converting at least two further signal parameters into a third signal parameter, said at least two further signal parameters being derived from one of said first signal parameter and a second signal parameter, one of said at least two further signal parameters being at a first time-point and at a first frequency and an other of said at least two further signal parameters being at a second time-point and at a second frequency, wherein either the first and second time-points or the first and second frequencies are different from each other; anddiscounting the third signal parameter during the step of generating the quality signal so as to yield the discounted third signal parameter.