Patent ID: 8077893

Claim:
Method for computing inter-channel level differences from a first audio source signal x 1 and a second source signal x 2 , the first source signal x 1 being wired with a first processing module PM 1 and the second source signal x 2 being wired with a second processing module PM 2 , the second processing module PM 2 receiving wirelessly information from the first processing module PM 1 , this method comprising the steps of: (a) acquiring first samples of the first sound signal x 1 by the first processing module PM 1 , (b) defining a first time frame comprising several acquired samples of the first source signal, (c) converting the first time frame into first frequency bands, (d) grouping the first frequency bands into at least two first frequency sub-bands, (e) calculating a first power estimate of each first frequency sub-bands, (f) encoding the first power estimates and transmitting the encoded first power estimates to the second processing module PM 2 , (g) acquiring second samples of the second sound signal x 2 by the second processing module PM 2 , (h) defining a second time frame comprising several acquired samples of the second source signal, (i) converting the second time frame into second frequency bands, (j) grouping the second frequency bands into at least two second frequency sub-bands, (k) calculating a second power estimate of each second frequency sub-bands, (l) receiving and decoding the encoded first power estimates, (m) computing for each frequency sub-band, an inter-channel level difference by subtracting the first decoded power estimates and the second power estimates.