Spectral Subtraction
Simon Brown
Understanding spectral subtraction and its use in noise reduction for SDR Console. Not yet as good as SDR# but a step in the right direction!
https://www.g4eli.com/blog/spectral-subtraction
Simon Brown
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Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
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Conrad, PA5Y
Simon thank you for your work.
I find the burbling sounds associated with Spectral subtraction most off putting. I believe it is called ‘musical noise’ and is more obtrusive with speech than music.
This is interesting. https://www.vocal.com/noise-reduction/musical-noise/
It offers suggestions as to how it may be reduced which do work. Probably Simon has already incorporated these techniques.
I have been working commercially on this very subject exclusively with AM radio for the last 4 months with great success, unfortunately I cannot share what we have done.
SDR# suffers from the same affliction, at least based on the recordings that I could find online. If anyone has any good examples of spectral subtraction with SDR# please post them.
Watch the video below at 08:24, this is about the best in amateur radio I’ve heard, the artefacts are there but acceptable for our purposes.
https://www.youtube.com/watch?v=KR5t4Hei9FA
73
Conrad PA5Y
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
On Behalf Of Simon Brown via groups.io
Sent: 13 May 2022 09:29 To: SDR-Radio@groups.io Subject: [SDR-Radio] Spectral Subtraction
Understanding spectral subtraction and its use in noise reduction for SDR Console. Not yet as good as SDR# but a step in the right direction!
https://www.g4eli.com/blog/spectral-subtraction
Simon Brown
- + - + - Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
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Simon Brown
Conrad,
This is being worked on, I’m now at a stage where I can move forward with Luciano Dato’s work.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Conrad, PA5Y
Sent: 13 May 2022 10:25 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Spectral Subtraction
Simon thank you for your work.
I find the burbling sounds associated with Spectral subtraction most off putting. I believe it is called ‘musical noise’ and is more obtrusive with speech than music.
This is interesting. https://www.vocal.com/noise-reduction/musical-noise/
It offers suggestions as to how it may be reduced which do work. Probably Simon has already incorporated these techniques.
I have been working commercially on this very subject exclusively with AM radio for the last 4 months with great success, unfortunately I cannot share what we have done.
SDR# suffers from the same affliction, at least based on the recordings that I could find online. If anyone has any good examples of spectral subtraction with SDR# please post them.
Watch the video below at 08:24, this is about the best in amateur radio I’ve heard, the artefacts are there but acceptable for our purposes.
https://www.youtube.com/watch?v=KR5t4Hei9FA
73
Conrad PA5Y
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown via groups.io
Understanding spectral subtraction and its use in noise reduction for SDR Console. Not yet as good as SDR# but a step in the right direction!
https://www.g4eli.com/blog/spectral-subtraction
Simon Brown
- + - + - Please use https://forum.sdr-radio.com:4499/ when posting questions or problems. -- - + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
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Conrad, PA5Y
I am quite sure that you will do a good job!
Conrad
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
On Behalf Of Simon Brown via groups.io
Sent: 13 May 2022 11:30 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Spectral Subtraction
Conrad,
This is being worked on, I’m now at a stage where I can move forward with Luciano Dato’s work.
From:
main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
On Behalf Of Conrad, PA5Y
Simon thank you for your work.
I find the burbling sounds associated with Spectral subtraction most off putting. I believe it is called ‘musical noise’ and is more obtrusive with speech than music.
This is interesting. https://www.vocal.com/noise-reduction/musical-noise/
It offers suggestions as to how it may be reduced which do work. Probably Simon has already incorporated these techniques.
I have been working commercially on this very subject exclusively with AM radio for the last 4 months with great success, unfortunately I cannot share what we have done.
SDR# suffers from the same affliction, at least based on the recordings that I could find online. If anyone has any good examples of spectral subtraction with SDR# please post them.
Watch the video below at 08:24, this is about the best in amateur radio I’ve heard, the artefacts are there but acceptable for our purposes.
https://www.youtube.com/watch?v=KR5t4Hei9FA
73
Conrad PA5Y
From:
main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
On Behalf Of Simon Brown via groups.io
Understanding spectral subtraction and its use in noise reduction for SDR Console. Not yet as good as SDR# but a step in the right direction!
https://www.g4eli.com/blog/spectral-subtraction
Simon Brown
- + - + - Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
- + - + - Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
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Siegfried Jackstien
i am sure you can make it perfect ... if that slight hiss that is left is also filtered away then there is no need to use squelch anymore ;-) good job dg9bfc sigi ps tnx fer restoring the max values up Am 13.05.2022 um 11:30 schrieb Simon
Brown:
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Simon Brown
Indeed, that paper you referenced is my next reading material.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Conrad, PA5Y
Sent: 13 May 2022 10:42 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Spectral Subtraction
I am quite sure that you will do a good job!
Conrad
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown via groups.io
Conrad,
This is being worked on, I’m now at a stage where I can move forward with Luciano Dato’s work.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Conrad, PA5Y
Simon thank you for your work.
I find the burbling sounds associated with Spectral subtraction most off putting. I believe it is called ‘musical noise’ and is more obtrusive with speech than music.
This is interesting. https://www.vocal.com/noise-reduction/musical-noise/
It offers suggestions as to how it may be reduced which do work. Probably Simon has already incorporated these techniques.
I have been working commercially on this very subject exclusively with AM radio for the last 4 months with great success, unfortunately I cannot share what we have done.
SDR# suffers from the same affliction, at least based on the recordings that I could find online. If anyone has any good examples of spectral subtraction with SDR# please post them.
Watch the video below at 08:24, this is about the best in amateur radio I’ve heard, the artefacts are there but acceptable for our purposes.
https://www.youtube.com/watch?v=KR5t4Hei9FA
73
Conrad PA5Y
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown via groups.io
Understanding spectral subtraction and its use in noise reduction for SDR Console. Not yet as good as SDR# but a step in the right direction!
https://www.g4eli.com/blog/spectral-subtraction
Simon Brown
- + - + - Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
- + - + - Please use https://forum.sdr-radio.com:4499/ when posting questions or problems. -- - + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
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Max
On Fri, May 13, 2022 at 10:25 AM, Conrad, PA5Y wrote:
Conrad, that is one of the best ever NRs I've ever heard. No detectable "burbling" on the voice, just noise reduction. Very nice. Hope Simon can emulate this and will be fantastic. 73 Max
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What is the hardware requirement, Simon? Is this processing the two channels of a device like the RSPDuo?
Regarding the artefacts, yes they can be annoying, but this level of noise reduction would only usually be used on signals at the limit of readability. Failing to get a new DXCC in the logbook is even more annoying than a bit of burbling and a confirmed log entry! -- Martin G8FXC
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Simon Brown
Hi,
No special hardware, it runs in the demodulation chain.
Simon Brown
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of martinbradford2001
Sent: 14 May 2022 11:51 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Spectral Subtraction
[Edited Message Follows] What is the hardware requirement, Simon? Is this processing the two channels of a device like the RSPDuo? -- - + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
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Siegfried Jackstien
and does a really well job .. grin :-) dg9bfc sigi Am 14.05.2022 um 19:15 schrieb Simon
Brown:
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