Displaying 20 results from an estimated 1300 matches similar to: "Performance of the acoustic echo canceller"
2007 Mar 06
0
Performance of the acoustic echo canceller
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
2007 Mar 06
1
Performance of the acoustic echo canceller
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
2007 Mar 05
1
Performance of the acoustic echo canceller
Hi All, I am working on my master project to port the Speex Acousic Canceller to FPGA. But I am not able to get a satisfied result in its performance whenI integrated it to a SIP softphone as my first step. The SIP softphone calls to a PSTN gateway and lands to my land line phone. I can hear the echo of my every word while I talks on the land line phone. I am using G.711 codec, frame_size 80
2007 Sep 22
1
Echo Cancellation Problem -- with sound sample
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
2006 Sep 21
1
echo cancellation causes assertion
Hello,
i'm adding echo cancellation to my voip application, but when i call
speex_echo_capture() or speex_echo_playback() causes an assertion
failed, it seens that there is a delete in any where.
i've encapsulated echo canceller in a class that storage the state and
simply call the functions:
void EchoCanceller::Playback(short *echo_frame)
{
speex_echo_playback(echo_state,
2008 Feb 08
1
Echo Canceller on Windows Mobile
Hi Jean Marc,
We are running the speex echo canceller code on a Windows Mobile smartphone using a TI OMAP 201MHz 850. We are making voip calls and audio is working without echo canceller code. Simply adding the following 2 functions whether the echo cancellation is wired in (ie we use the output frame ) or not performance becomes terrible. Note 2 separate threads are used to handle audio.
2009 Jan 26
2
speex_echo_cancel, please help!
Hello,
Need some help using the speex_echo_cancel.
I've read the documentation about the
speex_echo_cancellation function:
speex_echo_cancellation(echo_state, input_frame, echo_frame,
output_frame);
(in) echo_state => speex internal state.
(in) input_frame => audio captured by mic.
(in) echo_frame => the signal that was played in the
speaker.
(out) output_frame => the
2007 Sep 22
1
Echo Cancellation Problem -- with sound sample
Thank you for you quick reply, Jean-Marc.
I have just used a human voice to replace the sine wave, but the result is like a broken voice after tens of seconds. Do you have some sample voice in .sw that I can test with? I want to have one set or a few sets of sample voice that work for my understanding and debugging.
This is the output from echo_diagnostic.m in my human voice test:
Far end to
2006 Oct 27
2
Echo Canceller trouble in 1.2beta1
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
2006 Oct 27
2
Echo Canceller trouble in 1.2beta1
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
2006 Oct 27
0
Echo Canceller trouble in 1.2beta1
Can you first try the svn version (or apply
https://trac.xiph.org/changeset/11882). As I mentioned in a previous
email, there's a bad bug in the 1.2beta1 echo canceller.
Jean-Marc
Coffey, Michael a ?crit :
> 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
2007 Sep 14
0
Speex echo canceller creating some problems. No voice coming.
Hi,
I am new to speex so please redirect me to some links if the question is
repetative.
Just for testing the echo canceller performance, I have added
mdf,fftwrap,misc,kiss_fftr,kiss_fft source files to my project.
Now In my multithread application when I receive packets from mice, I calls
speex_echo_capture(echo_state, input_frame, output_frame,Youtput_frame)
with input_frame as
2009 May 26
0
Hi, I've got 2 problems about Speex
Hello! I hope this Email is still available.
My goal is to cancel the echo caused by the client's mic and speaker through the Internet, which is also the aim of Speex.
I have read the manual and the api reference, but still have some problems about the usage.
1. about function speex_echo_cancellation(echo_state, input_frame, echo_frame, output_frame);
Parameters (input_frame,
2008 Feb 11
0
Echo Canceller on Windows Mobile
_____
From: Mohammed Sulaiman [mailto:mhh.sulaiman@talk21.com]
Sent: Monday, February 11, 2008 12:53 AM
To: Dennis Liu
Subject: RE: [Speex-dev] Echo Canceller on Windows Mobile
Hi, thanks. One question did you use these 2 functions
speex_echo_playback
speex_echo_capture
No, I didn't use them. I use my own code to buffer microphone and speaker
data.
or do you have your audio in
2005 Oct 09
0
Fw: problem in encoder/decoder
-------Original Message-------
From: Eid
Date: 10/09/05 14:07:44
To: speex-dev@xiph.org
Subject: problem in encoder/decoder
hi all,
I'm developing an app to broadcast voice over web. i tried to use speex and
download ver 1.04 documentation and use it to develop encoding and decoding
but after decoding voice is damaged i attach my encode/decode function.
BOOL
2014 Sep 02
0
Speex_echo_cancellation() always same output
Hi all,
I have been trying to impelement echo cancellation on STM32F4 Discovery board (having ARM based uC).In my project, I simply initialized the echo_state by speex_echo_state_init() by using frame_size 160, filter_length 800 (at 8kHz Sampling rate.) Then, I simply used speex_echo_cancellation() function in where i am getting sound. However, I have recently realised that output_frame has been
2005 Dec 10
3
AEC params
Hi:
By 'no success', I mean result gets worse in terms
that, there comes in a shrill noise with high gain and
also *no* attenuation of the echo.
I am trying to validate the DC offset part. But can
you please feed some light on how does the DC offset
matter for AEC. As I have already mentioned, I tried
adding silence (from 2 ms to 10 ms) in the start of
the reference signal. This is for
2006 Aug 14
2
AEC on a TI C6x - has no effect
Hello all,
I am attempting to integrate the AEC algorithm from Speex into an
RTP-based voice-over-IP application. The application is supposed to
operate on a TI C6412-based board, using Code Composer Studio for
development. Everything seems to be working, but the problem is that
there is no discernible difference in the output, whether the echo
cancel function is called or not.
Let me first
2008 Mar 28
1
acoustic echo canceller & noise reduction sample code
Hello?
My name is Hyeonwoo Oh.
I?m developing video conference software using speex library.
Can you give me some sample codes for acoustic echo canceller and noise
reduction?
I tried noise reduction API, but failed.
Normal encode/decode API is working well.
Thank you very much for your good job.
I?m very pleased with speex.
Best regards,
Hyeonwoo Oh
2010 Nov 04
1
About Acoustic Echo Canceller
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