Patent ID: 7466831
Filing Date: 2008-12-16
Classification: H04S

Abstract:
1. A processing circuit for audio signals and comprising: inputs for receiving first and second signals respectively; a first filter arranged to process the sum of said signals; a second filter arranged to process the difference of said signals; a first scaling unit coupled to the first input signal to provide a first scaled signal; a second scaling unit coupled to the second input signal to provide a second scaled signal; a third scaling unit coupled to the output of the first filter to provide a third scaled signal; a fourth scaling unit coupled to the output of the second filter to provide a fourth scaled signal; an adder arranged to add the first scaled signal, the third scaled signal and the fourth scaled signal in order to provide a processed first output signal; and a subtractor arranged to subtract the fourth scaled signal from the sum of the third scaled signal and the second scaled signal in order to provide a processed second output signal.