Re: Inverse matrix


"stef" <kabbaj@xxxxxx> wrote in message
news:6q-dnSbKc7TRSbbZRVn-qw@xxxxxxxxxxxxxxx
Hello, i'm new to this group
I'm trying to demix two audio signal.
My audio signals are y1 and y2 (Y=[y1;y2])
The impulse resonses: H11, H12, H21, H22.
The matrix form of the system is: y=H*x
I'm searching for x: x=(H^-1)*y
The problem is: det(H)=0, also invertible!
i'll be grateful for any idea.

There was some work done along these lines (the objective / not the
method)
using cepstral methods. The orchestra was removed from a Caruso
recording.
But, that's a lot more sophisticated than the method you are pursuing.

Fred

Thanks a lot for your answers,
I've tryed to calculate the inverse impulse responses in the time domain
using Levinson-Durbin Algorithm, and then i transform them to the
frequency domain using fft.
The problem now is that the inverse matrix H^-1 have a complex
parameters.
Any one know what means a complex impulse response matrix?
Thanks.
Stef




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