How would you treat this interference noise in a video?

questions about practical use of Neat Video, examples of use
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rimage
Posts: 33
Joined: Thu Aug 01, 2013 5:44 pm

How would you treat this interference noise in a video?

Post by rimage »

Trying to remedy a specific kind of noise in a video, this horizontal banding that looks like electrical interference of some sort. Not talking about the interlace combing but rather the background banding. Below is a screen shot and a link to a short .mpg example.

Original

http://forum.videohelp.com/attachment.p ... 1387078276

After my initial effort to treat with NV, the banding is still there.

http://forum.videohelp.com/attachment.p ... 1387078341

Short video example - 3.79 mb

http://forum.videohelp.com/attachments/ ... ample2.mpg
NVTeam
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Joined: Thu Sep 01, 2005 4:12 pm
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Post by NVTeam »

I would try to build a noise profile using a large area including those waves, then would enable Very Low Freq option, probably increase the Low Freq Noise Level, play with the temporal filter radius too.

Vlad
Zach
Posts: 38
Joined: Sat Jun 01, 2013 12:37 pm

Post by Zach »

Sorry this reply is so late, hopefully you figured this out already but I wanted to reply so that people didn't end up confused by what they were seeing vs what you reported.

Your clip is either Interlaced. Or Possibly a mix of Interlaced + Telecine as well.

I found that out with 5 minutes of playing around in MeGUI using DGindex and various deinterlacing techniques.

There are still some combing artifacts but I was able to produce an image almost devoid of combing, vs all the combing your screenshots showed.

You probably just need to fiddle around with something like Avisynth and a very good (i.e slow) decomb filter.
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