Yeah. In the  Because it 's  a little bit different of the other method. Well , we have  If this  if this is the noise signal ,  uh , in the log domain , we have something like this. Now , we have something like this. And the idea of these methods is to   n given a , um
How do you say ? I will read because it 's better for my English. I i given is the estimate of the PDF of the noise signal when we have a , um , a statistic of the clean speech and an statistic of the noisy speech. And the clean speech  the statistic of the clean speech is  from a  codebook. Mmm ? This is the idea. Well , like , this relation is not linear. The methods propose to develop this in a vectorial Taylor series  approximation.
I I 'm actually just confused about  the equations you have up there. So , uh , the top equation is  is  is
No , this in the  it 's  this is the log domain. I  I must to say that.