Patent ID: 6792119
Filing Date: 2004-09-14
Classification: H04R,H04S

Abstract:
An audio system comprising a circuit for processing an audio signal, said audio signal processing circuit comprising:an input for receiving the audio signal and an output for supplying an output signal; filtering means coupled to said input for passing low-frequency components of said audio signal to form a filtered audio signal; a harmonics generator coupled to the filtering means for generating harmonics of the filtered audio signal; and adding means coupled to the input as well as to the harmonics generator for supplying a sum of the audio signal and the generated harmonics to the output, characterized in that the harmonics generator comprises: an input for receiving the filtered audio signal; rectifying means coupled to the input for rectifying the filtered audio signal; an integrator coupled to the rectifying means for integrating the rectified filtered audio signal; and resetting means coupled to the integrator for resetting the integrator at resetting times, characterized in that the integrator comprises means for limiting an amplitude of the integrated signal, and the integrator adapts an integration time-constant in dependence on a frequency of the integrated signal.