Patent ID: 8014999

Claim:
A method for operating a computer-based audio transmission system ( 1 ) having an input signal (X n ) and a time framed output signal (Y n ), the computer-based audio transmission system establishing a first frequency compensated input pitch power density function (PPX′(f) n ) of the time framed input signal (X n ), the method comprising the steps of: processing ( 2 . 1 . . . 2 . 3 ) the input signal (X n ), to obtain an input pitch power density function (PPX(f) n ); processing ( 2 . 4 . . . 2 . 6 ) the output signal (Y n ), to obtain an output pitch power density function (PPY(f) n ); frequency compensating ( 2 . 7 , 2 . 8 ) the input pitch power density function (PPX(f) n ), with a first frequency compensating function (H 1 (f)), to obtain the first frequency compensated input pitch power density function (PPX′(f) n ); the method being characterized by the step of frequency compensating ( 2 . 7 , 2 . 8 ) the input pitch power density function (PPX(f) n ) comprising a power based softscaling function with offset [6] using with a power in the range of 0.5, and an offset in the range of 4*10 5 .