Patent ID: 8335579

Claim:
A method of restoring a corrupted audio signal comprising the steps of: inputting the corrupted audio signal in a first channel, inputting one or more further correlated audio signals in one or more further channels, and restoring the corrupted audio signal using a mathematical model that models the corrupted signal as a linear combination of scaled time shifted portions of the further signal(s) and the corrupted signal, in which the mathematical model uses the following equations: x 1 ⁡ ( n ) = ∑ i = 1 P 1 1 ⁢ a 1 1 ⁡ ( i ) ⁢ x 1 ⁡ ( n - i ) + ∑ j = 1 P 2 1 ⁢ a 2 1 ⁡ ( j ) ⁢ x 2 ⁡ ( n - j + τ 2 1 ) + ∑ k = 1 P 3 1 ⁢ a 3 1 ⁡ ( k ) ⁢ x 3 ⁡ ( n - k + τ 3 1 ) + … + e n ⁢ ⁢ 1 ⁢ x m ⁡ ( n ) = ∑ i = 1 P m m ⁢ a m m ⁡ ( i ) ⁢ x m ⁡ ( n - i ) + ∑ j = 1 P 1 m ⁢ a 1 m ⁡ ( j ) ⁢ x 1 ⁡ ( n - j + τ 1 m ) + ∑ k = 1 P 2 m ⁢ a 2 m ⁡ ( k ) ⁢ x 2 ⁡ ( n - k + τ 2 m ) + … + e n ⁢ ⁢ m wherein x 1 , x 2 , . . . , x m , are outputs of channel 1, 2, . . . , m; a j i are model coefficients between channels i, j; P j i are orders of model coefficients between channels i, j; τ j i are time-shifting constants between channels i, j; and e n1 , e n2 , . . . , e nm are white noise inputs.