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Wave Corrector Users • View topic - Linearly averaged noise profile
Page 1 of 1

Linearly averaged noise profile

PostPosted: Mon Jan 17, 2005 9:46 pm
by schiller
I mainly use WC on shellac, and there, due to all the parameters of the format and the scanning process, a noise profile sampled in the lead-in will typically differ much from a noise profile as found in the lead-out.

When de-noising with one of these, it is typically found to work quite well close to where the profile was sampled and degrade in efficiency the further away one gets.

HENCE:

Why not allow to specify TWO noise samples N1, N2 say at times t1, t2 (beginning and end of track) and employ a time-dependent noise profile that is a linear mix of the two when de-noising the signal in between:

N(t) = N1x((t2-t)/(t2-t1)) + N2x((t-t1)/(t2-t1))

PostPosted: Tue Jan 18, 2005 10:08 am
by Derek

PostPosted: Sat Jan 22, 2005 1:41 am
by schiller

PostPosted: Sun Jan 23, 2005 3:35 pm
by Derek

PostPosted: Mon May 23, 2005 6:30 am
by mannie.gross

PostPosted: Wed May 25, 2005 8:06 am
by Derek

PostPosted: Wed May 25, 2005 8:25 pm
by mannie.gross

PostPosted: Wed May 25, 2005 8:51 pm
by Derek

PostPosted: Thu May 26, 2005 5:29 am
by mannie.gross

PostPosted: Wed Nov 02, 2005 8:05 pm
by mannie.gross

PostPosted: Thu Nov 03, 2005 10:06 am
by Derek

PostPosted: Mon Jul 31, 2006 8:41 pm
by mannie.gross
I don't think I can see this in the just released beta. Pity, I was looking forward to this feature.

Regards,
Mannie

PostPosted: Tue Aug 01, 2006 7:12 am
by Derek
Yes, sorry about that. I am still looking at it and it could still be included in this release cycle. It was given a low priority because I'm not sure how big a requirement there is for this.

Do you (or anyone else) have a sample file that exhibits this phenomenon, ie where the noise varies linearly between the start and end of the file? I'd like to be able to test the effectiveness of any change I make. We have an ftp site that you could upload to. You can pm me for details.

PostPosted: Tue Aug 01, 2006 9:13 pm
by mannie.gross
Sorry, I don't have one that I know of. How would I tell? I suppose what I am hoping for is something that will give me better noise removal. I could test this by listening to the results.

Regards,
Mannie

PostPosted: Mon Aug 07, 2006 9:44 am
by Derek
The latest build of the beta now implements this functionality. See