similar to: Problems with Speex echo canceller in 1.1.10

Jean-Marc, That was my first thought as well. However, I double checked everything and it wasn't reversed. I also reversed it to see what would happen. In that case, the NES came out unchanged. (This NES was the original FES.) Any other ideas? Also, do you know what algorithm is used? - Eric Scott > -----Original Message----- > From: Jean-Marc Valin

I'm having trouble getting the echo canceller to work and I'm hoping some one can get me started in diagnosing what's going on. The symptoms I'm seeing are these: 1. If the NES is silence (i.e., no echo, no speech), the ec puts the FES back into the audio. 2. If the NES is similar to the FES (same speech words), the ec doesn't seem to remove the echo. 3. For case #2, I pushed

Eecho cancellation is used to eliminate the echo which mixed with near end speech, while it was occured by far end speech. It always work like this: Find the similar speech in near end speech and eliminate it. In case 1: Because the there is no echo in near end speech, and the EC module still works on it. So a inverse model is been calculated, and a inverse signal is produced. In this way ,

Hi, I tried keeping it for a very long time and put logs there and it always went to not adapting. This is how I initialize speex_echo_cancel SpeexEchoState* _echoState = speex_echo_state_init(160, 320*10); I have 20 msecs of audio with 16bits for a sample. If two frames are identical and are given to speex_echo_cancel for many iterations, should I expect silence. Thanks -Anurag Quoting

Look at the manual. There's just too many possibilities to screw up I don't feel like listing them every time. With 8 kHz audio, 20 ms frames and 50-300 ms tail, I can definitely say that it works (as long as you get things right). Jean-Marc Le mercredi 21 d?cembre 2005 ? 13:51 +0800, wu xudong a ?crit : > I have tested the AEC by file model,but found it > doesn't work!The

hi all, i want to use the echo canceller feature of Speex 1.1.10. For that i hav added speex_echo.h in my code.and have called the function. till compilation everything is fine but on linking it is giving me uresolved symbol error ... speexenc.obj : error LNK2001: unresolved external symbol _speex_echo_state_init Debug/speexenc.exe : fatal error LNK1120: 1 unresolved externals Error executing

All, Wonder why all my posts has no line breaker when it displayed the forum... I used Hotmail(Windows Live Mail) with FireFox 2.0. I am posting this msg with IE 7.0 and see if it make any difference. Anybody experienced the same issue and how to workaround it? Thanks a lot! Regards, William From: espzzh@hotmail.comTo: jean-marc.valin@usherbrooke.caCC: speex-dev@xiph.orgSubject: RE:

Hi everyone, I've just released Speex 1.1.9. The main change in this release is the echo canceller work sponsored by Tipic Inc (http://www.tipic.com/). It is now possible to do acoustic echo cancellation and obtain good attenuation after a short adaptation time. This has been tested at 8 kHz, but it should also work at 16 khz and above, so give it a try. There were also some fixes to the

The builds that I referred to in my last mail should be 11398 and 11387, not 11387 and 11343. Sorry for any confusion. - Jim ----- Original Message ----- From: "Jim Crichton" <jim.crichton@comcast.net> To: "Jean-Marc Valin" <Jean-Marc.Valin@USherbrooke.ca> Cc: <speex-dev@xiph.org> Sent: Wednesday, May 10, 2006 11:47 AM Subject: Re: [Speex-dev] Speex echo

Hi So in your case if you don't want to use speex_echo_cancellation than you should do next way: Save the playback frames (clean echo) within separate playback thread with speex_echo_playback func. Then use speex_echo_capture - it will remove the clean echo frame (saved with speex_echo_playback func) from const spx_int16_t *rec buffer (saved with speex_echo_capture) and you will get

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

Hi Yes, it's absolutely unnecessary to use speex codec. You can encode the echo cancelled auido data with any codec you want. The Echo Canncelation API is here - http://www.speex.org/docs/api/speex-api-reference/group__SpeexEchoState. html I would advice you to look at speex_echo_cancellation function but you will have to sync playback and capture streams by yourself. I've used

Why not use gcc? You can get either mingw or cygwin. Otherwise I don't know. Speex should compile with a C++ compiler with only minor tweaks (forcing the compiler to accept the C casts). Jean-Marc Le lundi 18 juillet 2005 ? 17:55 +0000, Wolfgang Frotten a ?crit : > I am a delphi coder and i have successfully compiled version 1.0.5 to use the > resulting dll in John Villars

Hi Jean-Marc, Thanks for the suggesting. I tried the test wtih my recording file offline through the testecho. I got the same result(no prepocessor echo suppression) as my recording file for that live call. Basically I don't see the difference between input_frame and output_frame. As I mentioned in my original post, the echo return loss is about 20db. I guess the echo cancelleris not really

It seems like the firefox 2.0 not quite works with hotmail... I am reposting my message again with IE for easy readability. Sorry about mess. Hi Jean-Marc, Thanks for the suggesting. I tried the test wtih my recording file offline through the testecho. I got the same result(no prepocessor echo suppression) as my recording file for that live call. Basically I don't see the difference

Jean-Marc, Well I finally tracked down the problem. Then I checked my mail and found that you had fixed it several hours earlier. :( Build 11387 produces the same result as my modified build 11343. Because of compiler limitations in the TI tools, I did have to make modifications to pseudofloat.h (separating return of float values) and nb_celp.c (adding braces around a variable declaration

I have tested the AEC by file model,but found it doesn't work!The output file I got still had echo. And I have found several version of mdf.c,could you tell me which version I should use? Now I'm using version 1.11.1.1 and under windows there have some bugs. --- Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>??: > > > haven't got the chance to sit down and look into

Following up on the original topic of synchronization between the local mic and local speaker streams: We can separate this problem into two sub-problems: (1) compensating for differences in sampling rates; and (2) compensating for delay between the two streams. For estimating the delay, what do you think of the idea of using cross-correlation? -mjc -----Original Message----- From: Jean-Marc

Definitely! It tells me that my delay is fine but drifting is -15. I use the same onboard sound to record the near end and far end voice. So I can assume it should be fine? But I don't see the any different between input and output the echo_canceller function for this recording. Maybe there is some nonlinearity issue there? The link of this file(Capture1.zip) is in

> Build 11387 produces the same result as my modified build 11343. Because of > compiler limitations in the TI tools, I did have to make modifications to > pseudofloat.h (separating return of float values) and nb_celp.c (adding > braces around a variable declaration in the middle of code). I have > attached a patch. You might prefer to do the nb_celp.c change in a >