similar to: echo canceller

? ? Hi Jean-Marc, When speech is played in speaker, we are feeding that speech to echo canceller for cancelling its echo from captured data and the echo canceller work very well. But when there is no speech, we are feeding samples of value zero to speaker and the same to echo canceller. But microphone is always capturing something. But when speech is played again after these zeros(silent

Hello everybody. I have the same problem like you. I use ARM microcontroller too. Here is the list of all functions called by speex_echo_cancel until goes into infinite loop: speex_echo_cancel() | spx_fft | kiss_fftr | kiss_fft | kiss_fft_stride | kf_work Function kf_work looks like: static void kf_work(kiss_fft_cpx * Fout, const kiss_fft_cpx * f, const size_t fstride, int

On 06/22/2011 09:30 AM, Steve Kann wrote: > Speaking of AEC (thought not quite on topic for this thread), > > Has anyone on this list played with the GIPS code that google just > open-sourced? It looks like their AEC also has code to handle > differential sample rates, though I haven't really evaluated it > thoroughly. > > There is really a lot of code in the drop ?

Then why ONE sound card have different capture and playback rate? It must be ONE single physical clock generator which is used by both ADC and DAC in the sound card, isn't it? If you are a hardware engineer. Will you design two different physical clock for ADC and DAC seperately? What on earth causes this problem? Who knows its intrinsic real reason? Isn't there any other solutions? For

Hi, Is there any win32 echo canceller demo with source code,speex echo canceller is very good,but with real net stream,it seems not work, it seems many people has this problem.Thanks a lot. Best regards Yong Chen admin@seeyoucn.com

Hi all, speex is great,echo canceller in speex is great,when I test echo canceller with testecho.c, it is much better then the echo canceller demo in intel IPP 5.1,but when I use the echo canceller in a real voice chat program for win32(16khz,20ms,winmm or portaudio or directsound), it is not work. Who can help me? I will pay money for a demo using dsound with source code.Thanks a lot.

Hi Folks, I am having trouble using speex_echo_cancel. As a starting point, I am using the testecho.c source code. I compiled the 1.2beta1 version. I have not tried any other versions of speex. The document says that the order of arguments to Speex_echo_cancel is (echo_state, input_frame, echo_frame, output_frame, residue) where "input_frame" is as captured from mic and

Hi Jean-Marc, I am developing a voice chat for win32 using speex,when I do echo cancellation, after 2 seconds adaptation, the echo canceller work very well,but after process silent(zero) echo signal(when enabled VAD,DTX),it work very bad,I have to reset it, it seems adapt faster then do not rest it, so I always here echo produce by my fisrt two second speech,how can I solve this problem?

On 06/22/2011 04:57 AM, Arun Raghavan wrote: > On Tue, 2011-06-21 at 11:39 -0700, Arun Raghavan wrote: > [...] >> I'm also running this on x86 (x86_64, technically), and it's all >> floating-point, so I guess this is a regression somewhere. Will try to >> see if I can run it without any optimisations if possible, which I >> assume should serve as an adequate

I am using 'portaudio' and 'speex' to implement a speech audio capture/playback. Preprocess works fine but not the echo canceller (associated with preprocessor). I have read 'testecho.c' but it didn't help me. What I am doing bad? This is my implementation: One thread to capture and playback, both are different functions called in different times directly from

> > Hello everybody. > > I have the same problem like you. I use ARM microcontroller too. > > Here is the list of all functions called by speex_echo_cancel until goes > > into infinite loop: >... > > else > > { > > do > > { > > kf_work(Fout , f, fstride*p, in_stride, factors,st); // ><---------- > > here this

Terrific! The patch fixes my problem quite decisively. I will want to use this with a 16K sample rate. Is it expected to work well with just another slight patch, or will we need to modify it more deeply? Also, are there any tunable parameters besides tail length? I am wondering about the aggressiveness of adaptation and I know you are an expert in that area. Thanks so much, Michael

Jean-Marc, I have traced the second infinite loop further. When st->adapted becomes true (mdf.c line 623), the first Yf[i] value is 4, the leak_estimate is 0xd4e, the resulting r is 3. The first value in st->Rf is 0, so e is 1, and r is set to e>>1, or 0. A little later there is a divide by r, and there is the hang. It seems that the 0 in Rf[0] is the problem, but I am not

Perhaps that's because I have some problem understanding the documentation, or dunno how to fine tune it. I tried to use the echo canceller to cancel out echo in case it is present, but when I tried it, it gives me echo even there is no echo at all, and the echo is more serious if there is echo present. I'm using speex with JNI, I shall give more details if needed. But i just want to

Just tried your files and I'm not running into any infinite loops and the cancellation works fine. Unless the C6x has the same problem, I suspect a 16-bit problem. I'll check and see if I find something. About the r=0 problem, I can't find where it ends up in a denominator, so I suspect is not (directly) the problem. Jean-Marc Le lundi 08 mai 2006 ? 20:05 -0400, Jim Crichton a ?crit

Hi,When captured speech contain sudden burst of sound like a bell ringing or a loud click sound along with echo, &nbsp;echo canceller seems go wrong in latest svn version. Is it because of sudden &nbsp;change from normal speech to say some high frequency sound?ThanksJam -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi Jim, I've just been made aware of these problems (look for the thread "speex echo cancellation limitations"). It's on my short-term TODO list. > If fftwrap.c, I ifdefed out the spx_fft_float and spx_ifft_float routines, > because there were not used and required smallft.c (which is not so small at > all) to be added to the build. Right, need to cleanup that

Hello. I'm from Federal University of Rio Grande do Sul - Brazil and I'm trying to adapt speex_echo.h (speex-1.2beta3-win32) to our video-conference software code. We are working on amplitude values, but I realised that in order to AEC works, one has to convert amplitude to frequency and filter the echo frequencies. So, my question is: Do I have to manually convert amplitude samples to

Hi, I wanted to play around with the echo canceller so I tried the testecho program. As speaker sound I fed it with a 440 Hz sine wave, and as mic with a 550 Hz + 440 Hz sine waves sound (but the 440 Hz component half the amplitude). I kind of expected to get a somewhat clean 550 Hz sine out, but it doesn't seem to work that way. Are there better samples I can use with testecho to see

I ran some further tests on mdf and here are the results: 1. reduced tail length to 100ms, aligned mic and speaker signals to within 10ms - almost no echo attenuation 2. aligned mic and speaker signals to within 5 samples - still almost no echo attenuation 3. ran testecho using the same file for mic and speaker - very good echo cancellation (of course this is expected, but I needed to do a sanity