[speex-dev] fixed point speex on a texas dsp + real time acquizition

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Thu Apr 1 10:41:06 PST 2004

> I want to know if it is possible to do a real time acquizition and to
> compresse in real time the audio input signal. By example, I have on my
> demonstration card an audio linein input. If I send an audio source (PC
> sound card output) on this input, does speex will be able to compress
> this signal in real time and to store it in a hard disk integrated to
> the demonstration card?

Well, I can't comment on the real-time acquisition and hard-drive
access, since SPeex has nothing to do with that. For real-time encoding,
it depends on the speed of your DSP (I don't know that model). 

> TO test that, i would want to send an audio source to my sound card
> input and  I would want do the acquizition of  my sound card input and
> compress with SPEEX this audio signal and play in the same time the
> decoded file SPX in order to measuring performances with an external
> audio analyser.
> Is it possible?and how can I do that?

Do you mean doing that on a DSP, or on a PC (before you do it on DSP)?


Jean-Marc Valin
Université de Sherbrooke, Québec, Canada

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