The other thing is to , uh  Most of the speech enhancement techniques have reported results on small vocabulary tasks. But we  we going to address this Wall Street Journal in our next stage , which is also going to be a noisy task so s very few people have reported something on using some continuous speech at all. So , there are some  I mean , I was looking at some literature on speech enhancement applied to large vocabulary tasks and spectral subtraction doesn't seems to be the thing to do for large vocabulary tasks. And it 's  Always people have shown improvement with Wiener filtering and maybe subspace approach over spectral subtraction everywhere. But if we  if we have to use simple spectral subtraction , we may have to do some optimization  to make it work @ @.
So they 're making  there  Somebody 's generating Wall Street Journal with additive  artificially added noise or something ?
Yeah , yeah.
Sort of a  sort of like what they did with TI - digits , and ?