[Speex-dev] Denoise causing drain pipe effect in audio

Gurinder Singh
Fri, 04 Jun 2010 11:58:15 -0000

Hi Jean

Thanks for the reply.

We expect to use the codec in an environment where we expect very high
background noise where high noise suppression will be needed. In a
situation like a soccer match.

Is there a way of retaining high noise suppression and still getting
better audio quality. Your pointers will be of great help.

Thanks,
Gurinder

On 6/4/10, Jean-Marc Valin <jean-marc.valin at usherbrooke.ca>
wrote:
> On 10-06-04 05:16 AM, Gurinder Singh wrote:
>> I have been developing an audio application using Speex. To reduce the
>> background noise in the captured audio I have enabled the denoise
>> feature and set the noise suppression level to 60.
>
> There you go, don't do that. There's a reason that's not the
default. If
> increasing that level didn't cause artefacts, I would have set it
higher
> by default.
>
> 	Jean-Marc
>
>> Although the
>> constant background noise is reduced but using denoise introduces a
>> weird effect in the audio which can be described as 'Drain
Pipe'
>> effect.
>>
>> Has anyone faced a simiar issue with the denoise. If yes how did u
>> manage to solve it or reduce this effect.
>>
>> Thanks,
>> Gurinder
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>>
>>
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