Speex dev - Dec 2007 - Echo cancellor causing synthetic noise..?

> the speex files cannot be played by "Windows" (I assume you mean
the
> media player) natively. speex codec will have to be supported as a
> playload type.
> 
> to do that, you have to install a Speex ACM.
> take a look at
> http://www.free-codecs.com/download/Speex_Voice_ACM_Codec.htm
Actually, I tend to recommend using Ogg files instead of wav. Those can
be played using this plugin:
http://illiminable.com/ogg/

Cheers,

	Jean-Marc
> once you have it installed, just open the windows recorder from
> start->programs->accesories->entertainment->sound recorder, in
the
> file->properties choose the speex codec.
> 
> now you can record and play speex files.
> 
> i suggest that the 'small budget set aside' be donated to red
cross.
> 
> - farhan
> 
> On Thu, 20 Dec 2007, jagjit sohal wrote:
> 
>>
>> Hi Jean,
>> This is my last attempt at trying to use speex for a project we are
>> working on. I have contacted you before, but i have had no joy what so
>> ever trying to find a working example in c++ that shows how to add a
>> header to a raw speex file, so that it an be played using windows.
>> If you do know of a working example can you please supply a link. As
>> this is a commercial project
>> maybe you could advise me of somebody that maybe able to help on a
>> small contrcat basis.
>> This may help us speed up development. We have a small budget set
>> aside and can pay for any help with this matter.
>> Thanks in advance.
>>
>> Regards
>> Bobby Sohal
>>
>> _________________________________________________________________
>> Free games, great prizes - get gaming at Gamesbox.
>> http://www.searchgamesbox.com
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>

Hi,

Merry Christmas to all. :)

I have been trying out new 1.2beta3 here and facing some noise problems, (I
can't say this is 1.2beta3 problem because I haven't tried out previous
version yet) and was wondering if anyone also has faced and solved similar
difficulties.

When the speex encoding/decoding (wideband) process starts, the voice is
crispy clear with almost no noise in the background, but as I run it for a
long time, noise start building up and even with (scary?) synthetic sounds
as well. (these noises continue even when I disable mic recording thus only
allowing all zero data from input device - sampling still goes on)  When I
only use the raw PCM data without speex codec, these symptoms didn't happen.

The speex library often prints this statement to my window.
" --> warning: The echo canceller started acting funny and got slapped
(reset). It swears it will behave now."

I am using win32 (Visual C++ 2005), compiled speex source code personally
with very few minor additions to code, using window's media interface (wave
in/out) in multi-thread environment. To transfer the data from wave in to
out, I use local-loop UDP transport.

I have set 10 quality, complexity 4, VBR on, VBR quality 10.0, DENOISE on,
echo canceller linked with preprocessor.

Thanks,

- Tim

It's likely (from the warning) that there's something wrong with the
input you give to the AEC. Most common are clipping and capture/playback
dropouts.

	Jean-Marc

Tim Na a ?crit :
> Hi,
> 
> Merry Christmas to all. :)
> 
> I have been trying out new 1.2beta3 here and facing some noise problems, (I
> can't say this is 1.2beta3 problem because I haven't tried out
previous
> version yet) and was wondering if anyone also has faced and solved similar
> difficulties.
> 
> When the speex encoding/decoding (wideband) process starts, the voice is
> crispy clear with almost no noise in the background, but as I run it for a
> long time, noise start building up and even with (scary?) synthetic sounds
> as well. (these noises continue even when I disable mic recording thus only
> allowing all zero data from input device - sampling still goes on)  When I
> only use the raw PCM data without speex codec, these symptoms didn't
happen.
> 
> The speex library often prints this statement to my window.
> " --> warning: The echo canceller started acting funny and got
slapped
> (reset). It swears it will behave now."
> 
> I am using win32 (Visual C++ 2005), compiled speex source code personally
> with very few minor additions to code, using window's media interface
(wave
> in/out) in multi-thread environment. To transfer the data from wave in to
> out, I use local-loop UDP transport.
> 
> I have set 10 quality, complexity 4, VBR on, VBR quality 10.0, DENOISE on,
> echo canceller linked with preprocessor.
> 
> Thanks,
> 
> - Tim
> 
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> Speex-dev@xiph.org
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> 
>