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Author Topic: DSP Noise Reduction Software  (Read 3365 times)
VK4ALL
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Posts: 3




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« on: June 09, 2015, 11:15:50 PM »

I noticed the program BRuniFilt which is a DSP Universal Noise Reduction software using the computers sound card for use by SWL's and Hams.
Unfortunately there is no setup instructions  - has anyone used this program on HF and if so what was the results - and please include your connection setup.
Thank you.
Rob
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W0BTU
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« Reply #1 on: June 10, 2015, 01:18:18 PM »

Where can we see it? Google turned up nothing useful here.

There's Winrad and Linrad. They are said to work well.
« Last Edit: June 10, 2015, 01:20:58 PM by W0BTU » Logged

K5WLR
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« Reply #2 on: June 10, 2015, 02:01:15 PM »

Found the zip file. It ran in Windows 7 as a stand-alone executable. Looks like all it needs is for you to feed the audio from your receiver to the computer and have a good set of speakers or headphones on the computer to get it to work. That is as far as I got. Best way to learn something like this is to play with it and have some fun!

73!

Will Rogers, K5WLR
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VK4ALL
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« Reply #3 on: June 10, 2015, 05:41:49 PM »

Where can we see it? Google turned up nothing useful here.

There's Winrad and Linrad. They are said to work well.

There is a video on You Tube showing this software being used for CW - have a look at  https://www.youtube.com/watch?v=lx9GbSWRcRs     its in the top right of the screen.

The software is on DX ZONE  http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=9871

thanks for the comments.
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KG7FIU
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« Reply #4 on: July 02, 2015, 01:53:46 AM »

Would be interested to see how well it works.

Not to be skeptical, but some "noise reduction" units don't really do what they say.
When you watch a video with someone doing an A/B test, you see how the unit just drops the entire audio level 2 to 3 dB  -- causing an uninformed user to say "ooh -- listen to how it cuts the noise!".  
Yeah the noise got cut -- but so did the signal.  Not very useful.
One could realize a similar "reduction in noise" by simply lowering the AF volume.
 
To do a credible job in evaluating the effectiveness of the noise-processing, one might need to boost the output of the processed audio a few dB so  it is on-par with that of the unprocessed audio.   And then compare.

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