[Speex-dev] Upsampling while decoding / Updating

Hermann Weber hermie.weber at gmx.de
Tue May 7 12:12:40 PDT 2013

Dear Nikos,

thank you very much for your advice!

I am not a little bit new to C++, and experiments (like using another 
third party library) always turn out to be days of work for me.
That is why I would first like to try Speex's new internal resampling 

I am currently still using the old 1.0.4 version.

I have now downloaded the new 1.2rc1 version.
Unfortunately it does not want to compile the libspeex.dll right away, 
VS2010 tells me:

Converting project file 

Failed to upgrade platform 'Windows Mobile 5.0 Pocket PC SDK (ARMV4I)'. 
Please make sure you have it installed under 
'%vctargetspath%\platforms\Windows Mobile 5.0 Pocket PC SDK (ARMV4I)'
VCWebServiceProxyGeneratorTool is no longer supported. The tool has been 
removed from your project settings.
Failed to upgrade 'Debug|Windows Mobile 5.0 Pocket PC SDK (ARMV4I)'. 
Please make sure you have the corresponding platform installed under 
'%vctargetspath%\platforms\Windows Mobile 5.0 Pocket PC SDK (ARMV4I)'
The project configuration dimension name/value "(Platform, Win32)" was 
not found in the project manifest.

Is it possible to compile the libspeex.dll without support for Windows 
Mobile 5.0, or is there no other way?
I am afraid of messing anything up by install it.


Am 07.05.2013 16:03, schrieb Nikos Chantziaras:
> On 07/05/13 13:07, Hermann Weber wrote:
>> Hello!
>> I would like to know if it is possible to request encoding to a higher
>> samplerate than the original data.
>> For example my uncompressed data was 22 kHz, and I would now like to
>> decode the compressed data to 48 kHz (to feed it to a filter which
>> expects a high "input" format).
>> Is this possible with Speex?
> Speex comes with a resampler, so yes. You need to resample your signal
> after decoding it.
> However, I'd recommend using the Opus resampler instead of the Speex
> one.  (It can be used stand-alone and directly included in your own code.)
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