Patent ID: 7054455
Filing Date: 2006-05-30
Classification: H04R,H04S

Abstract:
1. 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; an integrator coupled to the input for integrating the filtered audio signal, said integrator comprising means for limiting an amplitude of the integrated signal, and said integrator adapting an integration time-constant in dependence on a frequency of the integrated signal; and resetting means coupled to the integrator for resetting the integrator at resetting times.