| 摘要 |
In order to reduce the disturbing background noises that may arise during the summation with weighting of the spectral coefficients using a correction factor in a downmix method, the proposition is made that the correction factors m(k) are computed as follows: eA(k)=Real(A(k))Real(A(k))+Imag(A(k))·Imag(A(k)) eB(k)=Real(B(k))·Real(B(k))+Imag(B(k))·Imag(B(k)) x(k)=Real(A(k))·Real(B(k))+Imag(A(k))·Imag(B(k)) w(k)=D·x(k)/(eA(k)+L·eB(k)) m(k)=(w(k)2+1)(1/2)-w(k) wherein m is the kth correction factor; and A(k) is the kth spectral value of the signal to be prioritized; and B(k) is the kth spectral value of the signal not to be prioritized; and D is the degree of compensation; and L is the degree of the limitation of the compensation.
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