similar to: Patch to get impulse response from echo canceller

Hi, I made a small error in the impulse reponse function; when doing the inverse fft in fixed point, it will overflow unless it's properly scaled. This patch uses the same scaling as that used when updating the filters, and the outputs now have the same shape and the same scale in fixed and floating point. Best regards, Thorvald -------------- next part -------------- diff -ubBwr

I have been working on a project importing Speex to a embedded platform for a while. When I tried to shut down the macro TWO_PATH in Speex AEC to save space, an error occurred. Dbf is undefined. The 1.2rc1 code is like this Dbf = 0; See = 0; #ifdef TWO_PATH /* Difference in response, this is used to estimate the variance of our residual power estimate */ for (chan = 0; chan < C;

Hi, Ref the disucussion on IRC yesterday; here's a patch which makes a bit more data from the analysis of the preprocessor and the echo canceller available. For the preprocessor: - Size of power spectrum. - Power spectrum and noise estimate of the previous frame. These are given as squared values, so sqrt() to get values in the 0->32767 range. - Current amplification level

Hi, Here are the next two patches for the data export. speex_get_psd should be applied after speex_get_agc_gain (sent in previous mail). It allows applications to get the power spectrum for the signal and the noise estimate. speex_get_prob should be applied last. It allows fetching the speech probability of the current frame (the value that the _PROB_START and _PROB_CONTINUE parameters are

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 Jean-Marc, I just updated from svn and it looks like there are some errors in the speex.mmp file. the filters.c is duplicated, and the fft/kiss.c files are still missing.. /alfred Jean-Marc Valin wrote: > Applied in svn. Thanks. > > Jean-Marc > > Alfred E. Heggestad a ?crit : >> hi, >> >> this patch should fix the symbian build. >> >> >>

Applied in svn. Thanks. Jean-Marc Alfred E. Heggestad a ?crit : > hi, > > this patch should fix the symbian build. > > > /alfred > > > ------------------------------------------------------------------------ > > Index: symbian/bld.inf > =================================================================== > --- symbian/bld.inf (revision 12114) > +++

I am in the process of dropping the TI DSP lib fft routines into the AEC. Currently, FFTWrap.c uses the USE_SMALLFT and USE_KISS_FFT to select between two packages of FFT routines. ] #ifdef USE_SMALLFT ... #elif defined(USE_KISS_FFT) ... #else #error No other FFT implemented #endif My guess is that every DSP and many other processors will have their own specific FFT and iFFT. What method

Hello - I'm working on improving the robustness of AEC on Android phones. With the audio API I'm given, there's no way to detect a microphone buffer overrun. While overruns don't happen often, they are possible, and I'd like to handle them gracefully. Currently, repeated microphone overruns cause the offset between the capture and play samples to increase over time, unless

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

dear all I got this error when I try to use libspeex in visual studio. when I include speex/speex_echo.h, it complains about unresolved external symbol _speex_echo_state_init. And when I include mdf.c into the source, it generates whole bunch of errors. Any idea? thanks so much --------------------Configuration: audio - Win32 Debug-------------------- Compiling... mdf.c C:\Documents and

There is experimental echo cancellation code. Look in speex_echo.h and mdf.c. Unfortunately there's no sample code, and I don't think anyone's had much luck getting the echo cancellation to work at all. Would anyone like to prove me wrong? I'd love to see this work! I know it's really hard but just tonight the person I was talking to asked me, "Is there ever

> 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? Just use SPEEX_ECHO_GET_SAMPLING_RATE to let the aec know what sampling rate you're using (default is 8000). > Also, are there any tunable parameters besides tail length? I am > wondering about the aggressiveness of

Thanks Jean, I missed that detail. I have a few more compile errors if you could help me with it => In function speex_echo_state_init in mdf.c I am getting error: "undefined reference to exp". I don't see a fixed point implementation of "exp". Can you point me to the correct files. I am using the following files from speex 1.2 beta1 => mdf.c,

Hi Jerry, I'd say the best would be to simply replace the #ifdef USE_SMALLFT by #ifdef USE_TI_FFT #include "ti_fft_wrapper.h" #elif defined(USE_SMALLFT) and have everything in the include file. There's no real point in overriding individual functions since they all go together. Also, make sure you wrap the FFT in the same way as I did with the fixed-point kissfft. For example,

Hi Dan, Thanks for the patch, I'll apply it to svn. One question, why do you need this: +void kiss_fftri2(kiss_fftr_cfg cfg,const kiss_fft_scalar *freqdata,kiss_fft_scalar *timedata); + Cheers, Jean-Marc Dan Everton a ?crit : > Hi, > > I'm one of the people working on the Rockbox project > (http://www.rockbox.org) which is an open source alternative firmware > for a

Hello... I want to ask you something about your software implementation of MDF filter with DTD machanism. (mdf.c speex_echo.h files) My questions are: 1. What are theoretical (using in your articles) equivalents of index symbols from your program? 2. Could you describe or give me an algorith which was using during software implementation of the MDF+DTD 3. How I could freeze MDF by means of DTD

> Today's Topics: > > 1. AEC with WB mode (Jean-Christophe.Berge@etu.enseeiht.fr) > 2. Multiple frame encode and decode (Reza Fatahillah) > 3. cant link speex_echo.h (jesus) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 20 Sep 2006 08:46:03 +0200 (CEST) > From:

Hi, I've attached a patch against SVN r14645 which adds GCC visibility information to all symbols exported from libspeex.so and libspeexdsp.so. It includes a configure.ac change to test that both the compiler flags and __attribute__((visibility)) works, and if so will #define EXPORT __attribute__((visibility("default"))) and if not #define EXPORT I've attached a diff output

Hi, I've attached a patch against SVN r14645 which adds GCC visibility information to all symbols exported from libspeex.so and libspeexdsp.so. It includes a configure.ac change to test that both the compiler flags and __attribute__((visibility)) works, and if so will #define EXPORT __attribute__((visibility("default"))) and if not #define EXPORT I've attached a diff output