similar to: Help needed regarding Echo Cancellation

I am trying to use the speex echo canceler and preprocessor with sipXtapi to develop a sip user agent. the sipXmedialib call flow graph uses 10ms frames and I am not sure what the implications are if I try to change this. The documentation seemed to indicate that a 20ms frame was recomended, but it didn't go into the consquences of using other frame sizes. We are going to use headsets

Hi, I couldn't find a discussion that specifically addresses this, so here it is. I'm using Speex AEC in my mobile VoIP application to cancel speaker echo. The used version is 1.2rc1 from the website, and I'm compiling with fixed-point. On most occasions, the AEC works very well and cancels most of the echo (combined with the preprocessor). On some devices, where the microphone signal

But that's what a jitter buffer will do, eventually - drop a packet. And it's better to drop a silence packet. Cheers, .a -----Original Message----- From: Jean-Marc Valin [mailto:jean-marc.valin@usherbrooke.ca] Sent: Wednesday, December 21, 2005 3:39 PM To: Alex Bakaev Cc: Shantanu Gramsci; speex-dev@xiph.org Subject: RE: [Speex-dev] Bitrate problem On Wed, 2005-12-21 at 15:29 -0800,

Hi Jean-Marc, thanks for the response. First, I will clarify again that floating-point solves this - so isn't that a bug in fixed-point? Also, I understand that algorithmically the AEC won't cancel echo properly on a non-linear signal, but why completely distort the output? If the echo just won't get cancelled it would be acceptable, but in the current state it disables the ability to

Hi all: I was analysising the speex code these days and learned much from it. Thank you so much! But I have a question about VAD: After preprocess(denoise and agc are off, vad is on),the input pcm speech was distorted seriously.The input speech include ten syllables(one~ ten), but the output speech lost one! Can you tell me why? Please see the attachment about input and output: (See attached

Hello all how can sample from f(x)~x^(a-1)*ind(0,min(b,-log(u)) in R? where a and b is positive constand and 0<u<1 thanks khazaei

Hi, all. When AGC enabled, I can hear echo and electronic noise. (in newest svn version) In my thought the computed gain value is too big. Which value exactly can affect to max boost level? And I want to implement the echo cancellation. Is there any example? Forgive my poor question. Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL:

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

Hello, I need to append something to the global "llvm.global_ctors". This variable may or may not already be declared within the current module. If I lookup the global variable, I see that it supports a getOperand(i) and setOperand(i,c), but does not support any way that I can enlarge that array to add a new record. Any suggestions? -- Nick Johnson

It appears that both the echo canceller and the noise reducer (NR) introduce rather severe clicking artifacts when presented with audio that has slightly overloaded the A/D converters. I am talking about speech that sounds just slightly distorted, due to clipping, when simply played back. If I pass that speech through the echo canceller or the noise reducer, it acquires really loud clicks and/or

I'm using Speex in Windows VoIP application and trying to implement echo cancellationI'm using waveInXXXX and waveOutXXXX API. I'm doing quite simple thing: After buffer is played (I get MM_WOM_DONE message) I'm just copying it's content to temporary playback buffer After buffer is recorded (I get MM_WIM_DONE message) I call speex_echo_cancellation(state, recorded_buf,

Hi, I use speex 1.1.12 in my program, but I found a strange thing about Echo canceller. That is, I'll hear an explosion in a certain frequency inputing. And I use the echo canceller in 44100Hz sample rate, disable AGC and Denoise. Can you tell me what's wrong with me? -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi there just installed latest build of wine through macports. I'm running MacOS 10.5, with intel core 2 duo 2.4GHz. When I click the audio tab in winecfg it gives me the message: There is no audio driver currently specified in the registry. A recommended driver has been selected for you. You can use this driver or select another driver if available. You must click Apply for the selection

hello, can I get out of wine more than 16 bit output? sound_file -> player -> wine_out, which is 24/32 to linux? somethink like that, I am audiophile :( thank you

I am having trouble running TalonRO which is a ragnarok online private server. I am on Mac OSX 10.6.7 Snow Leopard and I am using Wine 1.3.16. I downloaded the installer file for the game and ran it through wine. The installer seemed to run fine without any problems. After that I ran the patch client for the game which then let me boot into the game. After that the game boots up but it just

First, I'd just like to thank the Speex community, and Jean-Marc especially, for their great work. I'm developing a VoIP library (which uses IAX, the asterisk protocol) as the network protocol. I've been putting off integrating Speex for a while, as things have been working pretty well so far with GSM. (for those interested, the code is at iaxclient.sourceforge.net). However,

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

well i discoverd, HL uses waveIn, which is a part of the DirectSound ... so ... is there a Wine binding for waveIN ? - -moritz angermann

Hello all, I am trying out the echo cancellation of Speex (1.2beta2) on Windows XP. I use the Windows Media API (i.e. waveInOpen, waveOutOpen etc) for playback and capture, but I cannot make echo cancellation works in my use case. Here is a description of what I tried: (the sound is in 8kHz and 16 bits per sample, the frame size is 240, tail_length is long enough to cover the far end to near end

Hi, I use speex1.1.10 [June 10, 2005]in my VoIP application and it works very good for me. But sometimes I get loud metalic noise. Turning off EC, disappears the noise right away. I use EC with denoiser ON, AGC OFF, echo tail 400 ms. Has anyone experienced this? Since Speex1.1.11 has improvement for EC, I tried with the latest release [Speex1.1.12, which has fixed point EC]. But in my test, EC