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How would you treat this interference noise in a video?

Posted: Sun Dec 15, 2013 3:44 pm
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

Posted: Sun Dec 15, 2013 4:11 pm
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

Posted: Fri Mar 14, 2014 6:57 pm
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.