I'm going to test the echo cancellation...
but before doing something wrong, i want to know what is the right way
to use it...
-------------------------------------------------------------------------------------
short * speakerSample; //will contain what the speakers are going to play
short * microphoneSample; //what the microphone is going to register
short* cancelledSample; //the ouput without echo
int* cancelledSpectrum; //output cancelled spectrum
//now i assume that i should initialise everything like that:
SpeexEchoState* pechoState = speex_echo_state_init(160,x*160); //do the
second parameter need to be a multiple of the frame size?
AllocBuffers(SpeakerSample,microphoneSample,cancelledSample,cancelledSpectrum);
do{
captureSpeaker(speakerSample);
captureMicrophone(microphoneSample);
speex_echo_cancel(pechoState, microphoneSample, speakerSample,
cancelledSample, cancelledSpectrum);
while (!keypressed());
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so, do i need to deal with the cancelledSpectrum variable to perform
echo cancellation in a proper way?
do i need to deal with the delay between the sound being registered by
the microphone and the one going out of the speakers? (i don't know you
anderstand what i mean, sorry for my poor english)
also, there is an echo parameter to the preprocess function : int
speex_preprocess(SpeexPreprocessState *st, short *x, int *echo);
do i need to provide to it my cancelledSpectrum variable?
best regards,
fredo
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Le jeudi 30 d?cembre 2004 ? 21:35 +0100, Alfredo Moreira a ?crit :> I'm going to test the echo cancellation... > but before doing something wrong, i want to know what is the right way > to use it...The best I can suggest is to *not* use it... unless you know how to debug/tune it. Jean-Marc> ------------------------------------------------------------------------------------- > short * speakerSample; //will contain what the speakers are going to play > short * microphoneSample; //what the microphone is going to register > short* cancelledSample; //the ouput without echo > int* cancelledSpectrum; //output cancelled spectrum > > //now i assume that i should initialise everything like that: > > SpeexEchoState* pechoState = speex_echo_state_init(160,x*160); //do the > second parameter need to be a multiple of the frame size? > AllocBuffers(SpeakerSample,microphoneSample,cancelledSample,cancelledSpectrum); > > do{ > captureSpeaker(speakerSample); > captureMicrophone(microphoneSample); > speex_echo_cancel(pechoState, microphoneSample, speakerSample, > cancelledSample, cancelledSpectrum); > while (!keypressed()); > > ------------------------------------------------------------------------------------- > > so, do i need to deal with the cancelledSpectrum variable to perform > echo cancellation in a proper way? > do i need to deal with the delay between the sound being registered by > the microphone and the one going out of the speakers? (i don't know you > anderstand what i mean, sorry for my poor english) > also, there is an echo parameter to the preprocess function : int > speex_preprocess(SpeexPreprocessState *st, short *x, int *echo); > do i need to provide to it my cancelledSpectrum variable? > > best regards, > fredo > > > >-- Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca> Universit? de Sherbrooke
Hi all, I have deploy speex 1.1.6 in my application. With no option set, I can hear that the voice sounds a little bit artificial like robot. Any idea what causes this? I use openh323 with speex, but it seems ok. Is it neccessary for me to use more other filter prior to encode the sound or after decode my sound? yueweng __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail