Patent ID: 9521502
Filing Date: 2016-12-13
CPC Classification: H04R,H04S

Claim Text:
1. A method for determining an output stereo signal based on an input stereo signal, the input stereo signal comprising a first input audio channel signal and a second input audio channel signal, the method comprising: determining a first differential signal based on a difference of the first input audio channel signal and a filtered version of the second input audio channel signal, and determining a second differential signal based on a difference of the second input audio channel signal and a filtered version of the first input audio channel signal; determining a first power spectrum based on the first differential signal and determining a second power spectrum based on the second differential signal; determining a first weighting function and a second weighting function as a function of the first power spectrum and the second power spectrum, wherein the first weighting function and the second weighting function comprise an exponential function; and filtering a first signal, which represents a first combination of the first input audio channel signal and the second input audio channel signal, with the first weighting function to obtain a first output audio channel signal of the output stereo signal, and filtering a second signal, which represents a second combination of the first input audio channel signal and the second input audio channel signal, with the second weighting function to obtain a second output audio channel signal of the output stereo signal, wherein an exponent of the exponential function lies between 0.5 and 2.